publicationDate stringlengths 1 2.79k | title stringlengths 1 36.5k ⌀ | abstract stringlengths 1 37.3k ⌀ | id stringlengths 9 47 |
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1997-03-02 | On the Self-Consistent Spin-Wave Theory of Two-Dimensional Magnets With Impurities | The self-consistent spin-wave theory is applied to investigate the
magnetization distribution around the impurity in isotropic and easy-axis
two-dimensional ferro- and antiferromagents. The temperature dependences of
host magnetization disturbance and impurity magnetization are calculated. The
short-range order in the ... | 9703010v1 |
1999-05-24 | Temperature behavior of the magnon modes of the square lattice antiferromagnet | A spin-wave theory of short-range order in the square lattice Heisenberg
antiferromagnet is formulated. With growing temperature from T=0 a gapless mode
is shown to arise simultaneously with opening a gap in the conventional
spin-wave mode. The spectral intensity is redistributed from the latter mode to
the former. For... | 9905340v1 |
1999-11-23 | New Spin-Wave Mode in Weak Ferromagnetic Fermi Liquids | We study a phenomenological model for weak ferromagnetic Fermi liquids and
investigate the properties of the spin waves in the model. The Landau kinetic
equation is used to derive, in addition to the known Goldstone mode, a new
spin-wave mode -- the first Silin-like ferromagnetic mode. We discuss the role
of the intera... | 9911363v1 |
2000-05-29 | Orbital-ordering-induced anomalous softening of the ferromagnetic spin waves in perovskite manganites | Spin wave excitations were measured in the ferromagnetic phase of
Nd$_{1/2}$Sr$_{1/2}$MnO$_{3}$ by neutron scattering. This compound is located
in proximity to the A-type antiferromagnetic state, and it shows a clear
anisotropy and anomalous softening of the spin wave excitations. The softening
in the ferromagnetic pha... | 0005497v2 |
2002-10-18 | Spin-Wave Description of Haldane-gap antiferromagnets | Modifying the conventional antiferromagnetic spin-wave theory which is
plagued by the difficulty of the zero-field sublattice magnetizations diverging
in one dimension, we describe magnetic properties of Haldane-gap
antiferromagnets. The modified spin waves, constituting a grand canonical
bosonic ensemble so as to reco... | 0210399v3 |
2003-03-20 | About possible Phonon to Magnon alignment in 2 dimensions and theory of superconductivity in Copper-Oxide planes | We suggest that the phonon dispersion in cuprates becomes strongly
anisotropic due to interaction with spin waves; moreover the phonon dispersion
becomes singular along $|k_x|=|k_y|$ directions. This would allow more
electrons to form Cooper pairs and increase temperature of the superconducting
transition. The interact... | 0303402v5 |
2003-03-22 | A long-wave action of spin Hamiltonians and the inverse problem of the calculus of variations | We suggest a method of derivation of the long-wave action of the model spin
Hamiltonians using the non-linear partial differential equations of motions of
the individual spins. According to the Vainberg's theorem the set of these
equations are (formal) potential if the symmetry analysis for the Frechet
derivatives of t... | 0303479v1 |
2004-04-03 | Electromagnetic analog of Rashba spin-orbit interaction in wave guides filled with ferrite | We consider infinitely long electromagnetic wave guide filled with a ferrite.
The wave guide has arbitrary but constant cross-section $. We show that Maxwell
equations are equivalent to the Schr\"odinger equation for single electron in
the two-dimensional quantum dot of the form D with account of the Rashba
spin-orbit ... | 0404072v1 |
2004-07-29 | Field-induced spin density wave in (TMTSF)$_2$NO$_3$ | Interlayer magnetoresistance of the Bechgaard salt (TMTSF)$_2$NO$_3$ is
investigated up to 50 teslas under pressures of a few kilobars. This compound,
the Fermi surface of which is quasi two-dimensional at low temperature, is a
semi metal under pressure. Nevertheless, a field-induced spin density wave is
evidenced at 8... | 0407764v2 |
2004-09-17 | Solitary waves on finite-size antiferromagnetic quantum Heisenberg spin rings | Motivated by the successful synthesis of several molecular quantum spin rings
we are investigating whether such systems can host magnetic solitary waves. The
small size of these spin systems forbids the application of a classical or
continuum limit. We therefore investigate whether the time-dependent
Schroedinger equat... | 0409456v3 |
2005-08-30 | Current induced transverse spin-wave instability in thin ferromagnets: beyond linear stability analysis | A sufficiently large unpolarized current can cause a spin-wave instability in
thin nanomagnets with asymmetric contacts. The dynamics beyond the instability
is understood in the perturbative regime of small spin-wave amplitudes, as well
as by numerically solving a discretized model. In the absence of an applied
magneti... | 0508732v1 |
2005-11-11 | Magnonics: Experiment to Prove the Concept | An experimental scheme for studying spin wave propagation across thin film
samples is proposed. An experiment upon a periodically layered nanowire is
numerically simulated, while the sample might equally well be a continuous film
or an array of elements (e.g. nanowires) that either have uniform composition
or are perio... | 0511290v1 |
2005-11-11 | Spin wave spectrum of a magnonic crystal with an isolated defect | Real magnonic crystals - periodic magnetic media for spin wave (magnon)
propagation - may contain some defects. We report theoretical spin wave spectra
of a one dimensional magnonic crystal with an isolated defect. The latter is
modeled by insertion of an additional layer with thickness and magnetic
anisotropy values d... | 0511295v1 |
2006-11-30 | Theory of Brillouin Light Scattering from Ferromagnetic Nanospheres | We develop the theory of Brillouin light scattering (BLS) from spin wave
modes in ferromagnetic nanospheres, within a framework that incorporates the
spatial variation of the optical fields within the sphere. Our recent theory of
exchange dipole spin wave modes of the sphere provides us with eigenvectors.
When properly... | 0611785v1 |
1993-05-18 | Spin Structure of the Pion in a Light-Cone Representation | The spin structure of the pion is discussed by transforming the wave function
for the pion in the naive quark model into a light-cone representation. It is
shown that there are higher helicity ($\lambda_{1}+\lambda_{2}=\pm1$) states in
the full light-cone wave function for the pion besides the ordinary helicity
($\lamb... | 9305283v1 |
2004-12-18 | Relativistic wave equations for interacting massive particles with arbitrary half-intreger spins | New formulation of relativistic wave equations (RWE) for massive particles
with arbitrary half-integer spins s interacting with external electromagnetic
fields are proposed. They are based on wave functions which are irreducible
tensors of rank $n ($n=s-\frac12$) antisymmetric w.r.t. n pairs of indices,
whose component... | 0412213v1 |
2006-05-16 | Detection of Gravitational Wave - An Application of Relativistic Quantum Information Theory | We show that a passing gravitational wave may influence the spin entropy and
spin negativity of a system of $N$ massive spin-1/2 particles, in a way that is
characteristic of the radiation. We establish the specific conditions under
which this effect may be nonzero. The change in spin entropy and negativity,
however, i... | 0605135v1 |
2007-11-05 | Projected p-wave superconducting wave-functions for topological orders | In this paper we develop a sysmatical theory for topological orders by the
projected p-wave superconducting (SC) wave-functions and unify the different
topological orders for spin models into the fermionic picture. We found that
the energy for the fermions at k=(0,0), (0, pi), (pi, 0), (pi, pi) acts as a
topological in... | 0711.0571v1 |
2007-12-07 | The Hartree-Fock ground state of the three-dimensional electron gas | In 1962, Overhauser showed that within Hartree-Fock (HF) the electron gas is
unstable to a spin density wave (SDW) instability. Determining the true HF
ground state has remained a challenge. Using numerical calculations for finite
systems and analytic techniques, we study the HF ground state of the 3D
electron gas. At ... | 0712.1194v1 |
2008-02-21 | Coherent Control of spin-orbit precession with shaped laser pulses | Spin precession in Rubidium atoms is investigated through a pump-probe
technique. The excited wave packet corresponds to a precession of spin and
orbital angular momentum around the total angular momentum. We show that using
shaped laser pulses allows us to control this dynamics. With a Fourier
transform limited pulse,... | 0802.2986v1 |
2008-04-14 | Dissipation characteristics of quantized spin waves in nano-scaled magnetic ring structures | The spatial profiles and the dissipation characteristics of spin-wave
quasi-eigenmodes are investigated in small magnetic Ni$_{81}$Fe$_{19}$ ring
structures using Brillouin light scattering microscopy. It is found, that the
decay constant of a mode decreases with increasing mode frequency. Indications
for a contributio... | 0804.2200v1 |
2008-05-27 | Scattering of backward spin waves in a one-dimensional magnonic crystal | Scattering of backward volume magnetostatic spin waves from a one-dimensional
magnonic crystal, realized by a grating of shallow grooves etched into the
surface of an yttrium-iron garnet film, was experimentally studied. Rejection
frequency bands were clearly observed. The rejection efficiency and the
frequency width o... | 0805.4142v1 |
2008-11-21 | Frequency-dependent reflection of spin waves from a magnetic inhomogeneity induced by a surface DC-current | The reflectivity of a highly localized magnetic inhomogeneity is
experimentally studied. The inhomogeneity is created by a dc-current carrying
wire placed on the surface of a ferrite film. The reflection of propagating
dipole-dominated spin-wave pulses is found to be strongly dependent on the
spin-wave frequency if the... | 0811.3491v1 |
2009-01-13 | Refractive index and Snell's Law for Dipolar-Exchange Spin-Waves in a Confined Planar Structure | We derived the analytical forms of refractive index and Snell law for
dipolar-exchange spin waves of reflection and refraction at a magnetically
heterogeneous interface in a geometrically confined planer structure composed
of different magnetic thin films from a microscopic scattering approach. A
novel behavior, the op... | 0901.1700v2 |
2009-12-25 | A linearized spin-wave theory for thermodynamics of quantum Heisenberg antiferromagnet on a square lattice | The thermodynamics of the quantum Heisenberg antiferromagnet on a square
lattice is revisited through a linearized spin-wave theory which is well
defined at any finite temperature. We re-examine in details the temperature
dependence of the free energy, the internal energy, the entropy and the
specific heat. Most conclu... | 0912.4965v1 |
2010-07-25 | Optical excitation of nonlinear spin waves | We demonstrate a technique for exciting spin waves in an ultracold gas of
Rb-87 atoms based on tunable AC Stark potentials. This technique allows us to
excite normal modes of spin waves with arbitrary amplitudes in the trapped gas,
including dipole, quadrupole, octupole, and hexadecapole modes. These modes
exhibit stro... | 1007.4339v2 |
2011-04-19 | Chaotic Spin-Wave Solitons in Magnetic Film Feedback Rings | Chaotic spin-wave solitons in magnetic film active feedback rings were
observed for the first time. At some ring gain level, one observes the
self-generation of a single spin-wave soliton pulse in the ring. When the pulse
circulates in the ring, its amplitude varies chaotically with time. Numerical
simulations based on... | 1104.3871v1 |
2011-08-22 | Spin Density Wave in Insulating Ferromagnetic Frustrated Chain LiCuVO$_4$ | We study field induced quantum phase in weakly-coupled ferromagnetic
frustrated chain LiCuVO$_4$ by neutron diffraction technique. A new
incommensurate magnetic peak is observed at $H \ge 8.5$ T. The field dependent
propagation vector is identified with the spin density wave correlation in the
theoretically predicted m... | 1108.4255v1 |
2011-09-09 | Theoretical Investigation of the Magnetic Order in FeAs | The magnetic structure of the iron monoarsenide FeAs is studied using
first-principles calculations. We consider the collinear and non-collinear
(spin-spiral wave) magnetic ordering and magnetic anisotropy. It is
analitically shown that a magnetic triaxial anisotropy results in a sum of two
spin-spiral waves with oppos... | 1109.1924v1 |
2011-12-07 | Retrieval of multiple spin waves from a weakly excited, metastable atomic ensemble | The emission of light from a multiply excited atomic ensemble is examined and
it is shown how symmetric (spin-wave) and non-symmetric states of excitation
radiate into spatially separate field modes. This observation has potential
application to single photon generation and spin wave entanglement, since in
the presence... | 1112.1735v2 |
2012-01-31 | Generation of Multipartite Continuous-variable Entanglements via Atomic Spin Wave | We present a proof-of-principle way to generate nondegenerate multipartite
continuous-variable entanglements via atomic spin wave induced by the strong
coupling and probe fields in the Lambda-type electromagnetically induced
transparency configuration in an atomic ensemble. Quantum
correlated/anti-correlated and entang... | 1201.6577v1 |
2012-05-11 | Magnetic penetration depth in the presence of a spin-density wave in multiband superconductors at zero temperature | We present a theoretical description of the London penetration depth of a
multi-band superconductor in the case when both superconducting and
spin-density wave orders coexist. We focus on clean systems and zero
temperature to emphasize the effect of the two competing orders. Our
calculation shows that the supefluid den... | 1205.2564v1 |
2012-05-25 | Spin wave amplification driven by heat flow: the role of damping and exchange interaction | In this article we report on micromagnetic simulations performed on a
permalloy nanostructure in presence of a uniform thermal gradient. Our
numerical simulations show that heat flow is an effective mean to compensate
the damping, and that the gradients at which spin-wave amplification is
observed are experimentally ac... | 1205.5650v2 |
2013-11-12 | Nonreciprocity engineering in magnetostatic spin waves | Magnetostatic surface spin waves (MSSW) excited from a coplanar waveguide
antenna travel in different directions with different amplitudes. This effect,
called nonreciprocity of MSSW, has been investigated by micromagnetic
simulations. The ratio of amplitude of two counter propagating spin waves, the
nonreciprocity par... | 1311.2686v1 |
2014-11-10 | Magnon spectrum in ferromagnets with a skyrmion | The analysis of the spin wave excitations in two-dimensional isotropic
Heisenberg ferromagnet is performed with a single skyrmion in the ground state.
We employ the ideas of semiclassical quantization method, duly modified for the
use of the lattice model and Maleyev-Dyson boson representation of spin
operators. The re... | 1411.2452v2 |
2014-12-19 | Spin waves in one-dimensional bi-component quasicrystals | We studied finite Fibonacci sequence of Co and Py stripes aligned
side-by-side and in direct contact with each other. Calculations based on
continuous model including exchange and dipole interactions were performed for
structures feasible for fabrication and characterization of main properties of
magnonic quasicrystals... | 1412.6301v4 |
2015-01-06 | Spin Wave Diffraction Control and Read-out with a Quantum Memory for Light | A scheme for control and read-out of diffracted spins waves to propagating
light fields is presented. Diffraction is obtained via sinusoidally varying
lights shifts and ideal one-to-one mapping to light is realized using a
gradient echo quantum memory. We also show that dynamical control of the
diffracted spin waves sp... | 1501.01194v1 |
2015-03-16 | Detection of spin waves in permalloy using planar Hall effect | Rectification of microwave oscillations of magnetization in a permalloy film
is realized using planar Hall effect. Two different rectified signals are
obtained: a signal from the linearly excited uniform magnetization precession
at the frequency of the external pumping and a signal from the pairs of
contra-propagating ... | 1503.04638v1 |
2015-11-30 | Study of the Spin-weighted Spheroidal Wave Equation in the Case of s=3/2 | In this paper, we use the means of super-symmetric quantum mechanics to study
of the Spin-weighted Spheroidal Wave in the case of s=3/2. We obtain some
interesting results: the first-five terms of the super-potential, the general
form of the super-potential. The ground eigen-function and eigenvalue of the
equation are ... | 1512.00514v1 |
2016-01-04 | Direct and inverse cascades of spin-wave turbulence in spin-1 ferromagnetic spinor Bose-Einstein condensates | We theoretically and numerically study spin-wave turbulence in spin-1
ferromagnetic spinor Bose-Einstein condensates, finding direct and inverse
cascades with power-law behavior. To derive these power exponents analytically,
the conventional weak wave turbulence theory is applied to the spin-1 spinor
Gross-Pitaevskii e... | 1601.00446v2 |
2016-04-25 | Bias-free spin-wave phase shifter for magnonic logic | A design of a magnonic phase shifter operating without an external bias
magnetic field is proposed. The phase shifter uses a localized collective spin
wave mode propagating along a domain wall "waveguide" in a dipolarly-coupled
magnetic dot array existing in a chessboard antiferromagnetic (CAFM) ground
state. It is dem... | 1604.07337v1 |
2016-06-27 | Spin wave power flow and caustics in ultrathin ferromagnets with the Dzyaloshinskii-Moriya interaction | The Dzyaloshinskii-Moriya interaction in ultrathin ferromagnets can result in
nonreciprocal propagation of spin waves. We examine theoretically how spin wave
power flow is influenced by this interaction. We show that the combination of
the dipole-dipole and Dzyaloshinskii-Moriya interactions can result in
unidirectiona... | 1606.08159v2 |
2018-06-20 | Influence of quadratic Zeeman effect on spin waves in dipolar lattices | A lattice of particles with dipolar magnetic moments is considered under the
presence of quadratic Zeeman effect. Two types of this effect are taken into
account, the effect due to an external nonresonant magnetic field and the
effect caused by an alternating quasiresonance electromagnetic field. The
presence of the al... | 1806.07607v1 |
2012-09-06 | Excitation modes of vortices in sub-micron magnetic disks | Classical and quantum theory of spin waves in the vortex state of a
mesoscopic sub-micron magnetic disk has been developed with account of the
finite mass density of the vortex. Oscillations of the vortex core resemble
oscillations of a charged string in a potential well in the presence of the
magnetic field. Conventio... | 1209.1375v1 |
2019-06-24 | Graded index lenses for spin wave steering | We use micromagnetic modelling to demonstrate the operation of graded index
lenses designed to steer forward-volume magnetostatic spin waves by 90 and 180
degrees. The graded index profiles require the refractive index to diverge in
the lens center, which, for spin waves, can be achieved by modulating the
saturation ma... | 1906.09985v1 |
2021-02-23 | Fast acquisition of spin-wave dispersion by compressed sensing | For the realization of magnonic devices, spin-wave dispersions need to be
identified. Recently, the time-resolved pump-probe imaging method combined with
the Fourier transform was demonstrated for obtaining the dispersions in the
lower-wavenumber regime. However, the measurement takes a long time when the
sampling rate... | 2102.11626v1 |
2021-04-19 | A Thesaurus for Common Priors in Gravitational-Wave Astronomy | In gravitational-wave data analysis, we regularly work with a host of
non-trivial prior probabilities on compact binary masses, redshifts, and spins.
We must regularly manipulate these priors, computing the implied priors on a
transformed basis of parameters or reweighting posterior samples from one prior
to another. H... | 2104.09508v1 |
2019-04-19 | How does the photon's spin affect Gravitational Wave measurements? | We study the effect of the polarization of light beams on the time delay
measured in Gravitational Wave experiments. To this end, we consider the
Mathisson-Papapetrou-Dixon equations in a gravitational wave background, with
two of the possible spin supplementary conditions: by Frenkel-Pirani, or by
Tulczyjew. In the fi... | 1904.09260v2 |
2020-05-12 | Analysis in k-space of Magnetization Dynamics Driven by Strong Terahertz Fields | Demagnetization in a thin film due to a terahertz pulse of magnetic field is
investigated. Linearized LLG equation in the Fourier space to describe the
magnetization dynamics is derived, and spin waves time evolution is studied.
Finally, the demagnetization due to spin waves dynamics and recent experimental
observation... | 2005.05742v1 |
2020-05-26 | Spoken digit classification using a spin-wave delay-line active-ring reservoir computing | As a test of general applicability, we use the recently proposed spin-wave
delay line active-ring reservoir computer to perform the spoken digit
recognition task. On this, classification accuracies of up to 93% are achieved.
The tested device prototype employs improved spin wave transducers (antennas).
Therefore, in ad... | 2005.12557v1 |
2020-07-15 | Spin wave theory of one-dimensional generalized Kitaev model | In this work, we perform a combination of classical and spin wave analysis on
the one-dimensional spin-$S$ Kitaev-Heisenberg-Gamma model in the region of an
antiferromagnetic Kitaev coupling. Four phases are found, including a N\'eel
ordered phase, a phase with $O_h\rightarrow D_3$ symmetry breaking, and
"$D_3$-breakin... | 2007.07509v1 |
2006-11-29 | Wave Modes in the Magnetospheres of Pulsars and Magnetars | We study the wave propagation modes in the relativistic streaming pair plasma
of the magnetospheres of pulsars and magnetars, focusing on the effect of
vacuum polarization. We show that the combined plasma and vacuum polarization
effects give rise to a vacuum resonance, where ``avoided mode crossing'' occurs
between th... | 0611924v2 |
2005-11-12 | Universal properties of modulated antiferromagnetic systems | Magnetism and superconductivity are physical phenomena whose foundations are
rooted in quantum mechanics and whose technological applications do not cease
to surprise us. In this article we describe a class of magnetic materials, we
call modulated antiferromagnetic systems (MAS), that has a prominent
representative in ... | 0511303v1 |
2003-12-05 | The Mario Schenberg Gravitational Wave Detector: A mathematical model for its quadrupolar oscilations | In this work we present a mathematical model for the mechanical response of
the Brazilian Mario SCHENBERG gravitational wave (GW) detector to such waves.
We found the physical parameters that are involved in this response assuming a
linear elastic theory. Adopting this approach we determined the system's
resonance freq... | 0312035v1 |
2002-08-23 | Resonant Absorption between Moving Atoms due to Doppler Frequency Shift and Quantum Energy Variation | By taking both the Doppler frequency shift for electromagnetic wave and the
quantum energy variation of matter wave into consideration, a
resonant-absorption condition based on the local-ether wave equation is
presented to account for a variety of phenomena consistently, including the
Ives-Stilwell experiment, the outp... | 0208084v1 |
2004-09-03 | Nonlinear cyclotron-resonance accelerations by a generalized EM wave | Particle accelerations by a 1D, EM, dispersive pulse in an external magnetic
field are investigated. It is found that the well-known cyclotron resonance may
be classified into three regimes as the length and/or the amplitude of the
pulse are varied. Namely, as the pulse amplitude increases, the transit-time
cyclotron-r... | 0409025v1 |
2004-10-13 | Enhanced Doppler Effect in the Upper Hybrid Resonance Microwave Backscattering Experiment | Observations of enhanced Doppler frequency shift effect of the highly
localized microwave backscattering in the upper hybrid resonance are reported.
The experiment is performed at FT-2 tokamak, where a steerable focusing antenna
set, allowing off equatorial plane plasma extraordinary wave probing from high
magnetic fie... | 0410081v1 |
2005-09-05 | Rigorous analysis of grazing-angle scattering of electromagnetic waves in periodic gratings | Grazing-angle scattering (GAS) is a type of Bragg scattering of waves in
slanted non-uniform periodic gratings, when the diffracted order satisfying the
Bragg condition propagates at a grazing angle with respect to the boundaries of
a slab-like grating. Rigorous analysis of GAS of bulk TE electromagnetic waves
is under... | 0509040v1 |
2008-03-12 | Case study: calculation of a narrow resonance with the LIT method | The possibility to resolve narrow structures in reaction cross sections in
calculations with the Lorentz integral transform (LIT) method is studied. To
this end we consider a fictitious two-nucleon problem with a low-lying and
narrow resonance in the $^3P_1$ nucleon-nucleon partial wave and calculate the
corresponding ... | 0803.1770v1 |
2012-03-11 | Dynamical Systems' approach to relativistic nonlinear wave-particle interaction in weakly collisional plasmas | In this report, we present a dynamical systems' approach to study the exact
nonlinear wave-particle interaction in relativistic regime. We give a
particular attention to the effect of wave obliquity on the dynamics of the
orbits by studying the specific cases of parallel ($\theta=0$) and
perpendicular ($\theta=-\pi/2$)... | 1203.2302v1 |
2012-05-24 | Theory of ultrafast autoionization dynamics of Fano resonances | We study atomic autoionization processes in the time domain. With the
emerging attosecond extreme vacuum ultraviolet and soft x-ray pulses, we first
address how to characterize the time evolution of the decay of a discrete state
into a degenerate continuum. A short pump beam generates a number of resonance
states in a ... | 1205.5476v1 |
2014-09-11 | Superdimensional Metamaterial Resonators | We propose a fundamentally new method for the design of metamaterial arrays,
valid for any waves modeled by the Helmholtz equation, including scalar optics
and acoustics. The design and analysis of these devices is based on eigenvalue
and eigenfunction asymptotics of solutions to Schr\"odinger wave equations with
harmo... | 1409.3608v1 |
2014-11-27 | Ratchet effect enhanced by plasmons | Ratchet effect -- a {\it dc} current induced by the electromagnetic wave
impinging on the spatially modulated two-dimensional (2D) electron liquid --
occurs when the wave amplitude is spatially modulated with the same wave vector
as the 2D liquid but is shifted in phase. The analysis within the framework of
the hydrody... | 1411.7436v1 |
2016-02-08 | Detection and imaging of microcracking in complex media using coda wave interferometry (CWI) under linear resonance conditions | This letter presents the development of ultrasonic coda wave interferometry
to locate and image microcracks created within consolidated granular media,
polymer concrete. Results show that microcracks can be detected through coda
waves when the polymer concrete is submitted to a linear resonance. In
addition, the multip... | 1602.02510v1 |
2017-08-07 | Resonant absorption of electromagnetic waves in transition anisotropic media | We study the mode conversion and resonant absorption phenomena occurring in a
slab of a stratified anisotropic medium, optical axes of which are tilted with
respect to the direction of inhomogeneity, using the invariant imbedding theory
of wave propagation. When the tilt angle is zero, mode conversion occurs if the
lon... | 1708.02020v2 |
2017-09-03 | Non-reciprocal Optical Mirrors Based on Spatio-Temporal Modulation | The recent surge of interest in temporal modulation schemes to induce
magnet-free non-reciprocity has inspired several exciting opportunities for
photonic technology. Here, we investigate a scheme to realize free-space
isolators and highly non-reciprocal mirrors with weak modulation imparted by an
acoustic wave. Conven... | 1709.00702v1 |
2018-10-11 | Unexpected Thermal Conductivity Enhancement in Pillared Graphene Nanoribbon with Isotopic Resonance | Thermal transport in nanoribbon based nanostructures is critical to advancing
its applications. Wave effects of phonons can give rise to controllability of
heat conduction in nanostructures beyond that by particle scattering. In this
paper, by introducing pillars to form structural resonance, we systematically
studied ... | 1810.04841v2 |
2018-02-13 | High Quality Factor Surface Fabry-Perot Cavity of Acoustic Waves | Surface acoustic wave (SAW) resonators are critical components in wireless
communications and many sensing applications. They have also recently emerged
as subject of study in quantum acoustics at the single phonon level. Acoustic
loss reduction and mode confinement are key performance factors in SAW
resonators. Here w... | 1802.04788v1 |
2020-08-26 | Direct Imaging of Resonant Phonon-Magnon Coupling | Direct detection of phonons is important for the investigation of information
interconversion between the resonantly coupled magnons and phonons. Here we
report resonant coupling of magnons and phonons, which can be directly
visualized by using micro focused Brillouin light scattering in Ni/LiNbO3
hybrid heterostructur... | 2008.11391v2 |
2017-10-03 | On the wave dispersion and non-reciprocal power flow in space-time traveling acoustic metamaterials | This note analytically investigates non-reciprocal wave dispersion in locally
resonant acoustic metamaterials. Dispersion relations associated with
space-time varying modulations of inertial and stiffness parameters of the base
material and the resonant components are derived. It is shown that the
resultant dispersion ... | 1710.03689v2 |
2019-03-15 | Non-Scattering Multi-Mirror Systems for Field Localization | Resonators composed of two mirrors, such as Fabry-Perot cavities, provide a
simple but effective approach to achieve wave transmission with high finesse.
Further increase of the quality factor requires reflectors with higher
conductivity or multi-mirror solutions. However, the analytical complexity of
resonators with m... | 1903.06483v1 |
2019-05-29 | Surface phonon polariton resonance imaging using long-wave infrared-visible sum-frequency generation microscopy | We experimentally demonstrate long-wave infrared-visible sum-frequency
generation microscopy for imaging polaritonic resonances of infrared (IR)
nanophotonic structures. This nonlinear-optical approach provides direct access
to the resonant field enhancement of the polaritonic near fields, while the
spatial resolution ... | 1905.12499v1 |
2020-11-18 | Triadic resonances driven by thermal convection in a rotating sphere | We report for the first time on triadic resonances in a rotating convection
system. Using direct numerical simulations, we find that convective modes in a
rotating spherical fluid can excite a pair of inertial modes whose frequencies
and wavenumbers match the triadic resonance conditions. Depending on the
structures of... | 2011.09151v2 |
2020-11-24 | Learning the structure of giant resonances from their $γ$-decay | The direct $\gamma$-decays of the giant dipole resonance (GDR) and the giant
quadrupole resonance (GQR) of $^{208}$Pb to low-lying states are investigated
by means of a microscopic self-consistent model. The model considers effects
beyond the linear response approximation. The strong sensitivity of
$\gamma$-decay to th... | 2011.11943v1 |
2020-01-20 | Resonance scattering in a waveguide with identical thick barriers | We consider wave propagation across an infinite waveguide of an arbitrary
bounded cross-section, whose interior is blocked by two identical thick
barriers with holes. When the holes are small, the waves over a broad range of
frequencies are almost fully reflected. However, we show the existence of a
resonance frequency... | 2001.07060v1 |
2020-05-28 | Extreme quantum nonlinearity in superfluid thin-film surface waves | We show that highly confined superfluid films are extremely nonlinear
mechanical resonators, offering the prospect to realize a mechanical qubit.
Specifically, we consider third-sound surface waves, with nonlinearities
introduced by the van der Waals interaction with the substrate. Confining these
waves to a disk, we d... | 2005.13919v2 |
2020-05-29 | Semicylindrical microresonator: excitation, modal structure, and Q factor | The semicylindrical microresonator with relatively simple excitation with a
plane wave is studied. The resonator is formed on the base of the
dielectric/metal/dielectric structure, where the wave energy penetrates into
resonator through a thin metal layer and stored in a semicylindrical dielectric
with high permittivit... | 2005.14527v1 |
2020-12-29 | Impact of Band Structure on Wave Function Dissipation in Field Emission Resonance | We demonstrated on Ag(111) and Ag(100) surfaces that the reciprocal of the
field emission resonance (FER) linewidth, which is proportional to the mean
lifetime of resonant electrons in FER, may vary with the electric field. The
variation on Ag(111) was nearly smooth, whereas that on Ag(100) was sporadic
and fluctuated ... | 2012.14646v1 |
2022-02-13 | Approximating transmission and reflection spectra near isolated nondegenerate resonances | A linear scattering problem for which incoming and outgoing waves are
restricted to a finite number of radiation channels can be precisely described
by a frequency-dependent scattering matrix. The entries of the scattering
matrix, as functions of the frequency, give rise to the transmission and
reflection spectra. To f... | 2202.06324v1 |
2022-09-14 | Relativistic Topological Waves from Cherenkov and Doppler Resonances in Self-Magnetized Laser Plasmas | Strong magnetic fields at plasma-plasma interfaces can be naturally produced
in laser-plasma interactions. Using theoretical analysis and fully
three-dimensional particle-in-cell simulations, we demonstrate that
relativistic topological waves can be generated via Cherenkov and Doppler
resonances in the interaction of i... | 2209.06685v1 |
2022-12-02 | Inverse resonance problem for Love seismic surface waves | In this paper we solve an inverse resonance problem for the half-solid with
vanishing stresses on the surface: Lamb's problem. Using a semi-classical
approach we are able to simplify this three-dimensional problem of the elastic
wave equation for the half-solid as a Schr\"odinger equation with Robin
boundary conditions... | 2212.01075v2 |
2022-12-15 | Resonant and off-resonant magnetoacoustic waves in epitaxial Fe$_3$Si/GaAs hybrid structures | Surface acoustic waves (SAWs) provide an efficient dynamical coupling between
strain and magnetization in micro/nano-metric devices. Using a hybrid device
composed of a piezoelectric, GaAs, and a ferromagnetic Heusler alloy thin film,
Fe$_3$Si, we are able to quantify the amplitude of magnetoacoustic waves
generated wi... | 2212.07994v1 |
2023-05-24 | Time-reversal Invariance Violation and Quantum Chaos Induced by Magnetization in Ferrite-Loaded Resonators | We investigate the fluctuation properties in the eigenfrequency spectra of
flat cylindrical microwave cavities that are homogeneously filled with
magnetized ferrite. These studies are motivated by experiments in which only
small pieces of ferrite were embedded in the cavity and magnetized with an
external static magnet... | 2305.14753v1 |
2024-04-08 | A birdcage resonant antenna for helicon wave generation in TORPEX | A birdcage resonant helicon antenna is designed, mounted and tested in the
toroidal device TORPEX. The birdcage resonant antenna is an alternative to the
usual Boswell or half-helical antenna designs commonly used for $\sim$ 10 cm
diameter helicon sources in low temperature plasma devices. The main advantage
of the bir... | 2404.05441v1 |
2004-10-08 | Influence of bounce resonance effects on the cyclotron wave instabilities in dipole magnetospheric plasmas with anisotropic temperature | In this paper, we derive the dispersion equations for field-aligned cyclotron
waves in an axisymmetric dipole magnetospheric plasmas with both the
bi-Maxwellian and bi-Lorentzian distribution functions. To evaluate the
contribution of trapped particles to the transverse current density components
the Vlasov equation is... | 0410059v1 |
2021-08-13 | Kronoseismology V: A Panoply of Waves in Saturn's C Ring Driven by High-Order Internal Planetary Oscillations | Saturn's rings act as a system of innumerable test particles that are
remarkably sensitive to periodic disturbances in the planet's gravitational
field. We identify 15 additional density and bending waves in Saturn's C ring
driven by the planet's internal normal mode oscillations. Taking advantage of a
highly accurate ... | 2108.06362v1 |
2002-03-29 | Magnetic Order in YBa$_2$Cu$_3$O$_{6+x}$ Superconductors | Polarized and unpolarized neutron diffraction has been used to search for
magnetic order in YBa$_2$Cu$_3$O$_{6+x}$ superconductors. Most of the
measurements were made on a high quality crystal of YBa$_2$Cu$_3$O$_{6.6}$. It
is shown that this crystal has highly ordered ortho-II chain order, and a sharp
superconducting t... | 0204002v1 |
2004-03-28 | Fully polarized states and decoherence | The aim of this review is to show how ``ferromagnetic'' states, that is,
states having a fully polarization, can produce intrinsic decoherence by
unitary evolution. This effect can give an understanding of recent experiments
on mesoscopic devices as quantum point contacts showing the 0.7 conductance
anomaly and the wid... | 0403678v1 |
2007-04-28 | Atomic data from the Iron Project. LXIV. Radiative transition rates and collision strengths for Ca II | This work reports radiative transition rates and electron impact excitation
rate coefficients for levels of the n= 3, 4, 5, 6, 7, 8 configurations of Ca
II. The radiative data were computed using the Thomas-Fermi-Dirac central
potential method in the frozen core approximation and includes the polarization
interaction b... | 0704.3807v1 |
2008-09-03 | Phase transition and anomalous electronic behavior in layered dichalcogenide CuS (covellite) probed by NQR | Nuclear quadrupole resonance (NQR) on copper nuclei has been applied for
studies of the electronic properties of quasi-two-dimensional low-temperature
superconductor CuS (covellite) in the temperature region between 1.47 and 290
K. Two NQR signals corresponding to two non-equivalent sites of copper in the
structure, Cu... | 0809.0560v1 |
2009-02-06 | r-modes and mutual friction in rapidly rotating superfluid neutron stars | We develop a new perturbative framework for studying the r-modes of rotating
superfluid neutron stars. Our analysis accounts for the centrifugal deformation
of the star, and considers the two-fluid dynamics at linear order in the
perturbed velocities. Our main focus is on a simple model system where the
total density p... | 0902.1149v1 |
2009-04-08 | Effects of cobalt doping and three-dimensionality in $BaFe_2As_2$ | We investigate the dual roles of a cobalt impurity in the Ba-122
ferropnictide superconductor in the state with coexisting collinear spin
density wave (SDW) order as a dopant and as a scattering center, using first
principles electronic structure methods. The Co atom is found to dope the FeAs
plane where it is located ... | 0904.1257v2 |
2012-12-07 | Theory of Attosecond Transient Absorption Spectroscopy of Krypton for Overlapping Pump and Probe Pulses | We present the first fully ab initio calculations for attosecond transient
absorption spectroscopy of atomic krypton with overlapping pump and probe
pulses. Within the time-dependent configuration interaction singles (TDCIS)
approach, we describe the pump step (strong-field ionization using a
near-infrared pulse) as we... | 1212.1589v1 |
2014-08-25 | Measurements of the exchange stiffness of YIG films by microwave resonance techniques | Measurements of the exchange stiffness $D$ and the exchange constant $A$ of
Yttrium Iron Garnet (YIG) films are presented. The YIG films with thicknesses
from 0.9 $\mu$m to 2.6 $\mu$m were investigated with a microwave setup in a
wide frequency range from 5 to 40 GHz. The measurements were performed when the
external s... | 1408.5772v1 |
2017-05-02 | Amplitude-dependent topological edge states in nonlinear phononic lattices | This work investigates the effect of nonlinearities on topologically
protected edge states in one and two-dimensional phononic lattices. We first
show that localized modes arise at the interface between two spring-mass chains
that are inverted copies of each other. Explicit expressions derived for the
frequencies of th... | 1705.01118v2 |
2020-08-21 | Theory of polariton-electron interactions in semiconductor microcavities | We develop a microscopic description of an electron-doped two-dimensional
semiconductor embedded in a microcavity. Specifically, we investigate the
interactions between exciton-polaritons and electrons for the case where the
interactions between charges are strongly screened and the system is spin
polarized. As a start... | 2008.09292v2 |
2017-02-27 | Ubiquitous formation of bulk Dirac cones and topological surface states from a single orbital manifold in transition-metal dichalcogenides | Transition-metal dichalcogenides (TMDs) are renowned for their rich and
varied properties. They range from metals and superconductors to strongly
spin-orbit-coupled semiconductors and charge-density-wave systems, with their
single-layer variants one of the most prominent current examples of
two-dimensional materials be... | 1702.08177v2 |
2019-01-20 | Terahertz Strong-Field Physics without a Strong External Terahertz Field | Traditionally, strong-field physics explores phenomena in matter (atoms,
molecules, and solids) driven by an extremely strong laser field
nonperturbatively. However, even in the complete absence of an external
electromagnetic field, strong-field phenomena can arise when matter strongly
couples with the zero-point field... | 1901.06749v1 |
2019-10-30 | Modal analysis of a spinning disk in a dense fluid as a model for high head hydraulic turbines | In high head Francis turbines and pump-turbines in particular, Rotor Stator
Interaction (RSI) is an unavoidable source of excitation that needs to be
predicted accurately. Precise knowledge of turbine dynamic characteristics,
notably the variation of the rotor natural frequencies with rotation speed and
added mass of t... | 1910.14001v2 |
2020-01-23 | Theoretical methods for ultrastrong light-matter interactions | This article reviews theoretical methods developed in the last decade to
understand cavity quantum electrodynamics in the ultrastrong-coupling regime,
where the strength of the light-matter interaction becomes comparable to the
photon frequency. Along with profound modifications of fundamental quantum
optical effects g... | 2001.08715v2 |
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