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Chirality dependence of the radial breathing phonon mode density in
single wall carbon nanotubes: A mass and spring model is used to calculate the phonon mode dispersion for
single wall carbon nanotubes (SWNTs) of arbitrary chirality. The calculated
dispersions are used to determine the chirality dependence of the ra... | cond-mat_other |
Polarized emission of GaN/AlN quantum dots : single dot spectroscopy and
symmetry-based theory: We report micro-photoluminescence studies of single GaN/AlN quantum dots
grown along the (0001) crystal axis by molecular beam epitaxy on Si(111)
substrates. The emission lines exhibit a linear polarization along the growt... | cond-mat_other |
Self-consistent theory for molecular instabilities in a normal
degenerate Fermi gas in the BEC-BCS crossover: We investigate within a self-consistent theory the molecular instabilities
arising in the normal state of a homogeneous degenerate Fermi gas, covering the
whole BEC-BCS crossover. These are the standard insta... | cond-mat_other |
Dynamic Many-Body Theory. II. Dynamics of Strongly Correlated Fermi
Fluids: We develop a systematic theory of multi-particle excitations in strongly
interacting Fermi systems. Our work is the generalization of the time-honored
work by Jackson, Feenberg, and Campbell for bosons, that provides, in its most
advanced imp... | cond-mat_other |
Work functions of self-assembled monolayers on metal surfaces: Using first-principles calculations we show that the work function of noble
metals can be decreased or increased by up to 2 eV upon the adsorption of
self-assembled monolayers of organic molecules. We identify the contributions
to these changes for several ... | cond-mat_other |
Counter-flow Induced Decoupling in Super-Fluid Turbulence: In mechanically driven superfluid turbulence the mean velocities of the
normal- and superfluid components are known to coincide: $\mathbf U_{\text{n}}
=\mathbf U_{\text{s}}$. Numerous laboratory, numerical and analytical studies
showed that under these conditio... | cond-mat_other |
On the probable wave nature of Bose crystals: At the present time, it is considered that Bose crystals are formed at the
cooling of a fluid, because the state of crystal is more favorable by energy.
It is also believed [1,2] that no ordering factor forming a crystal is present,
except for the interatomic interaction.
... | cond-mat_other |
Phase reciprocity of spin-wave excitation by a microstrip antenna: Using space-, time- and phase-resolved Brillouin light scattering
spectroscopy we investigate the difference in phase of the two
counterpropagating spin waves excited by the same microwave microstrip
transducer. These studies are performed both for back... | cond-mat_other |
Quantum multimode model of elastic scattering from Bose Einstein
condensates: Mean field approximation treats only coherent aspects of the evolution of a
Bose Einstein condensate. However, in many experiments some atoms scatter out
of the condensate. We study an analytic model of two counter-propagating atomic
Gaussi... | cond-mat_other |
Negative refraction in nonlinear wave systems: People have been familiar with the phenomenon of wave refraction for several
centuries. Recently, a novel type of refraction, i.e., negative refraction,
where both incident and refractory lines locate on the same side of the normal
line, has been predicted and realized in ... | cond-mat_other |
Peculiarities in the properties of some rare-earth compounds with
orthorhombic structures: Rare-earth manganites are fascinating, because they display a wide variety of
fundamental properties from magnetism to ferroelectricity, from colossal
magnetoresistance to semi-metallicity, and because they can be used in a num... | cond-mat_other |
Dynamical stability of a doubly quantized vortex in a three-dimensional
condensate: The Bogoliubov equations are solved for a three-dimensional Bose-Einstein
condensate containing a doubly quantized vortex, trapped in a harmonic
potential. Complex frequencies, signifying dynamical instability, are found for
certain r... | cond-mat_other |
Elastic metamaterials for independent realization of negativity in
density and stiffness: In this paper, we present the realization of an elastic metamaterial allowing
independent tuning of negative density and stiffness for elastic waves
propagating along a designated direction. In electromagnetic (or acoustic)
meta... | cond-mat_other |
Vortex signatures in annular Bose-Einstein condensates: We consider a Bose-Einstein condensate confined in a ``Mexican hat''
potential, with a quartic minus quadratic radial dependence. We find conditions
under which the ground state is annular in shape, with a hole in the center of
the condensate. Rotation leads to th... | cond-mat_other |
A basis-set based Fortran program to solve the Gross-Pitaevskii Equation
for dilute Bose gases in harmonic and anharmonic traps: Inhomogeneous boson systems, such as the dilute gases of integral spin atoms
in low-temperature magnetic traps, are believed to be well described by the
Gross-Pitaevskii equation (GPE). GPE... | cond-mat_other |
The effect of a Chern-Simons term on dynamical gap generation in
graphene: We study the effect of a Chern-Simons term on dynamical gap generation in a
low energy effective theory that describes some features of mono-layer
suspended graphene. We use a non-perturbative Schwinger-Dyson approach. We
solve a set of couple... | cond-mat_other |
On the origin of Stark effect of rotons in He-II and the existence of p
= 0 condensate: Linear Stark effect of roton transition, experimentally observed through
microwave absorption in He-II (superfluid He) in the presence of varying
external electric field, is critically analysed. We find that: (i) The effect
cannot... | cond-mat_other |
Plasmonic Resonances and Electromagnetic Forces Between Coupled Silver
Nanowires: We compute the electromagnetic response and corresponding forces between two
silver nanowires. The wires are illuminated by a plane wave which has the
electric field vector perpendicular to the axis of the wires, insuring that
plasmonic... | cond-mat_other |
Thermodynamic Evidence for Water as a Quantum Mechanical Liquid: We consider general theoretical models of water and in particular the nature
of the motions of the hydrogen nuclei. If the motion of hydrogen nuclei is
classical, then the thermodynamic pressure equation of state for heavy water
wherein the hydrogen nucle... | cond-mat_other |
NMR Study of Disordered Inclusions in the Quenched Solid Helium: Phase structure of rapidly quenched solid helium samples is studied by the
NMR technique. The pulse NMR method is used for measurements of spin-lattice
$T_1$ and spin-spin $T_2$ relaxation times and spin diffusion coefficient $D$
for all coexisting phases... | cond-mat_other |
Direct Energy Cascade in Two-Dimensional Compressible Quantum Turbulence: We numerically study two-dimensional quantum turbulence with a
Gross--Pitaevskii model. With the energy initially accumulated at large scale,
quantum turbulence with many quantized vortex points is generated. Due to the
lack of enstrophy conserva... | cond-mat_other |
Effects of environmental and exciton screening in single-walled carbon
nanotubes: The ground-state exciton binding energy for single-walled carbon nanotubes
(SWCNTs) in vacuum calculated ignoring the screening of Coulomb interaction
appears to be much greater than the corresponding band gap. The most essential
contri... | cond-mat_other |
Atom interferometric detection of the pairing order parameter in a Fermi
gas: We propose two interferometric schemes to experimentally detect the onset of
pair condensation in a two spin-component Fermi gas. Two atomic wave-packets
are coherently extracted from the gas at different positions and are mixed by a
matter... | cond-mat_other |
Observing individual thermal motions of ions, and molecules in water
with light: We observe thermal motions of ions, and molecules in water through light
extinction, at the individual particle level. The motions appear as time
dependent intensity variations, characterized through their averaged spectra.
Theoretical s... | cond-mat_other |
Kelvin-wave turbulence generated by vortex reconnections: Reconnections of quantum vortex filaments create sharp bends which degenerate
into propagating Kelvin waves. These waves cascade their energy down-scale and
their waveaction up-scale via weakly nonlinear interactions, and this is the
main mechanism of turbulence... | cond-mat_other |
Influence of structure on the optical limiting properties of nanotubes: We investigate the role of carbon nanotubes structure on their optical
limiting properties. Samples of different and well-characterized structural
features are studied by optical limiting and pump-probe experiments. The
influence of the diameter's ... | cond-mat_other |
Repulsive Casimir forces produced in rectangular cavities: Possible
measurements and applications: We perform a theoretical analysis of a setup intended to measure the
repulsive (outward) Casimir forces predicted to exist inside of perfectly
conducting rectangular cavities. We consider the roles of the conductivity o... | cond-mat_other |
Simulation study of the two-dimensional Burridge-Knopoff model of
earthquakes: Spatiotemporal correlations of the two-dimensional spring-block
(Burridge-Knopoff) model of earthquakes are extensively studied by means of
numerical computer simulations. The model is found to exhibit either
``subcritical'' or ``supercrit... | cond-mat_other |
Material-independent crack arrest statistics: Application to indentation
experiments: An extensive experimental study of indentation and crack arrest statistics is
presented for four different brittle materials (alumina, silicon carbide,
silicon nitride, glass). Evidence is given that the crack length statistics can
... | cond-mat_other |
Gravity through the prism of condensed matter physics: In the paper "Life, the Universe, and everything--42 fundamental questions",
Roland Allen and Suzy Lidstr\"om presented personal selection of the
fundamental questions. Here, based on the condensed matter experience, we
suggest the answers to some questions concern... | cond-mat_other |
Extracting contact effects in organic field-effect transistors: Contact resistances between organic semiconductors and metal electrodes have
been shown to play a dominant role in electronic charge injection properties of
organic field-effect transistors. These effects are more prevalent in short
channel length devices ... | cond-mat_other |
Dipolar spinor Bose-Einstein condensates: Under many circumstances, the only important two-body interaction between
atoms in ultracold dilute atomic vapors is the short-ranged isotropic s-wave
collision. Recent studies have shown, however, that situations may arise where
the dipolar interaction between atomic magnetic ... | cond-mat_other |
Crystal Structure Studies of Human Dental Apatite as a Function of Age: Studies of the average crystal structure properties of human dental apatite
as a function of the tooth-age in the range of 5-87 years are reported. The
crystallinity of the dental hydroxyapatite decreases with the tooth-age. The
a-lattice constant ... | cond-mat_other |
MsSpec-DFM (Dielectric function module): Towards a multiple scattering
approach to plasmon description: We present here the MsSpec Dielectric Function module (MsSpec-DFM), which
generates dielectric functions in an electron gas or a liquid, either isolated
or embedded into an environment. In addition to standard mode... | cond-mat_other |
Coherent spin mixing dynamics in a spin-1 atomic condensate: We study the coherent off-equilibrium spin mixing inside an atomic
condensate. Using mean field theory and adopting the single spatial mode
approximation (SMA), the condensate spin dynamics is found to be well described
by that of a nonrigid pendulum, and dis... | cond-mat_other |
Quantitative determination of the Hubbard model phase diagram from
optical lattice experiments by two-parameter scaling: We propose an experiment to obtain the phase diagram of the fermionic Hubbard
model, for any dimensionality, using cold atoms in optical lattices. It is
based on measuring the total energy for a se... | cond-mat_other |
Polariton amplification in a multiple-quantum-well resonant photonic
crystal: Based on a microscopic many-particle theory we study the amplification of
polaritons in a multiple-quantum-well resonant photonic crystal. For the
Bragg-spaced multiple quantum wells under investigation we predict that in a
typical pump-pro... | cond-mat_other |
Laser tweezers for atomic solitons: We describe a controllable and precise laser tweezers for Bose-Einstein
condensates of ultracold atomic gases. In our configuration, a laser beam is
used to locally modify the sign of the scattering length in the vicinity of a
trapped BEC. The induced attractive interactions between ... | cond-mat_other |
Pair-Breaking in Rotating Fermi Gases: We study the pair-breaking effect of rotation on a cold Fermi gas in the
BCS-BEC crossover region. In the framework of BCS theory, which is supposed to
be qualitatively correct at zero temperature, we find that in a trap rotating
around a symmetry axis, three regions have to be di... | cond-mat_other |
Spontaneous symmetry breaking of gap solitons in double-well traps: We introduce a two dimensional model for the Bose-Einstein condensate with
both attractive and repulsive nonlinearities. We assume a combination of a
double well potential in one direction, and an optical lattice along the
perpendicular coordinate. We ... | cond-mat_other |
STS Observations of Landau Levels at Graphite Surfaces: Scanning tunneling spectroscopy measurements were made on surfaces of two
different kinds of graphite samples, Kish graphite and highly oriented
pyrolytic graphite (HOPG), at very low temperatures and in high magnetic
fields. We observed a series of peaks in the t... | cond-mat_other |
Stability of the decagonal quasicrystal in the Lennard-Jones-Gauss
system: Although quasicrystals have been studied for 25 years, there are many open
questions concerning their stability: What is the role of phason fluctuations?
Do quasicrystals transform into periodic crystals at low temperature? If yes,
by what mec... | cond-mat_other |
Computer simulation of quantum melting in hydrogen clusters: We introduce a new criterion--based on multipole dynamical correlations
calculated within Reptation Quantum Monte Carlo--to discriminate between a
melting vs. freezing behavior in quantum clusters. This criterion is applied to
small clusters of para-hydrogen ... | cond-mat_other |
Chaotic Dynamics of Spin-Valve Oscillators: Recent experimental and theoretical studies on the magnetization dynamics
driven by an electric current have uncovered a number of unprecedented rich
dynamic phenomena. We predict an intrinsic chaotic dynamics that has not been
previously anticipated. We explicitly show that ... | cond-mat_other |
Standing Spin Waves in an Antiferromagnetic Molecular Cr6 Horseshoe: The antiferromagnetic molecular finite chain Cr6 was studied by inelastic
neutron scattering. The observed magnetic excitations at 2.6 and 4.3 meV
correspond, due to the open boundaries of a finite chain, to standing spin
waves. The determined energy ... | cond-mat_other |
Study on Evolvement Complexity in an Artificial Stock Market: An artificial stock market is established based on multi-agent . Each agent
has a limit memory of the history of stock price, and will choose an action
according to his memory and trading strategy. The trading strategy of each
agent evolves ceaselessly as a ... | cond-mat_other |
On the effect of superfluid flows on the interaction of microwaves with
He II: The paper proposes a possible mechanism of interaction of microwaves with
superfluid helium that results in an experimentally observed narrow peak of
microwave absorption on the frequencies by the order of the roton frequency.
The obtained... | cond-mat_other |
Dressed matter waves: We suggest to view ultracold atoms in a time-periodically shifted optical
lattice as a "dressed matter wave", analogous to a dressed atom in an
electromagnetic field. A possible effect lending support to this concept is a
transition of ultracold bosonic atoms from a superfluid to a Mott-insulating... | cond-mat_other |
Linear dynamics of classical spin as Möbius transformation: Although the overwhelming majority of natural processes occurs far from the
equilibrium, general theoretical approaches to non-equilibrium phase
transitions remain scarce. Recent breakthroughs introducing description of open
dissipative systems in terms of non... | cond-mat_other |
Adaptive Sparse Sampling for Quasiparticle Interference Imaging: Quasiparticle interference imaging (QPI) offers insight into the band
structure of quantum materials from the Fourier transform of local density of
states (LDOS) maps. Their acquisition with a scanning tunneling microscope is
traditionally tedious due to ... | cond-mat_other |
String-Net Models with $Z_N$ Fusion Algebra: We study the Levin-Wen string-net model with a $Z_N$ type fusion algebra.
Solutions of the local constraints of this model correspond to $Z_N$ gauge
theory and double Chern-simons theories with quantum groups. For the first
time, we explicitly construct a spin-$(N-1)/2$ mode... | cond-mat_other |
GWΓ + Bethe-Salpeter equation approach for photoabsorption
spectra: Importance of self-consistent GWΓ calculations in small
atomic systems: The self-consistent GW{\Gamma} method satisfies the Ward-Takahashi identity
(i.e., the gauge invariance or the local charge continuity) for arbitrary
energy ($\omega$) and mome... | cond-mat_other |
On the Nature of Self-Consistency in Density Functional Theory: A thesis providing a pedagogical introduction to the problem of achieving
self-consistency in density functional theory. Contained is an introduction to
the framework of Kohn-Sham density functional theory, leading then to the
considerations required to so... | cond-mat_other |
A generalization of Wolynes factor in activated processes: Kramers-Grote-Hynes factor is the key nonequilibrium contribution to rate
constant of a reaction over and above the transition state theory rate in the
spatial limited regime. Wolynes in eighties introduced a quantum correction to
the overall rate coefficient. ... | cond-mat_other |
Optical chirality in gyrotropic media: symmetry approach: We discuss optical chirality in different types of gyrotropic media. Our
analysis is based on the formalism of nongeometric symmetries of Maxwell's
equations in vacuum generalized to material media with given constituent
relations. This approach enables us to de... | cond-mat_other |
Picosecond switching of high voltage reverse-biased p+-n-n+-structures
into conductive state by pulsed lighting: An analytical theory of high voltage reverse-biased p+-n-n+-structures
picosecond switching into conducting state by pulsed lighting has been
developed and a numerical simulation of this process has been p... | cond-mat_other |
Landau-Zener tunneling with many-body quantum effects in crystals of
molecular magnets: We present a quantum interpretation of the heights in hysteresis of $Fe_{8}$
molecule at lower temperatures by treating the crystal as an Ising spin system
with the dipolar interaction between spins. Then we apply it to two limit ... | cond-mat_other |
d-wave collapse and explosion of a dipolar Bose-Einstein condensate: We investigate the collapse dynamics of a dipolar condensate of 52Cr atoms
when the s-wave scattering length characterizing the contact interaction is
reduced below a critical value. A complex dynamics, involving an anisotropic,
d-wave symmetric explo... | cond-mat_other |
Self-sustained Levitation of Dust Aggregate Ensembles by Temperature
Gradient Induced Overpressures: In laboratory experiments we observe dust aggregates from 100 \mu m to 1 cm
in size composed of micrometer sized grains levitating over a hot surface.
Depending on the dust sample aggregates start to levitate at a tem... | cond-mat_other |
Frustration of Decoherence in Open Quantum Systems: We study a model of frustration of decoherence in an open quantum system.
Contrary to other dissipative ohmic impurity models, such as the Kondo model or
the dissipative two-level system, the impurity model discussed here never
presents overdamped dynamics even for st... | cond-mat_other |
Dynamical T-matrix theory for high-density excitons in coupled quantum
wells: Excitons in coupled quantum wells open the possibility to reach high
densities close to equilibrium. In a recent experiment employing a lateral trap
potential, a blue shift and a broadening of the exciton emission line has been
seen (Snoke,... | cond-mat_other |
Algebraic theory of crystal vibrations: Singularities and zeros in
vibrations of 1D and 2D lattices: A novel method for the calculation of the energy dispersion relation (EDR)
and density of states (DOS) in one (1D) and two (2D) dimensions is introduced
and applied to linear lattices (1D) and square and hexagonal lat... | cond-mat_other |
Second layer crystalline phase of helium films on graphite: We investigate theoretically the existence at low temperature of a
commensurate (4/7) crystalline phase of a layer of either He isotope on top of
a He-4 layer adsorbed on graphite. We make use of a recently developed,
systematically improvable variational appr... | cond-mat_other |
Dynamics of Superflow by Mesoscopic Condensate: The shear viscosity $\eta $ of a quantum liquid in the vicinity of
$T_{\lambda}$ is examined. In liquid helium 4 above $T_{\lambda}$
($T_{\lambda}<T<3.7K$), under a strong effect of Bose statistics, the coherent
many-body wave function grows to an intermediate size betwee... | cond-mat_other |
Adaptive Sparse Sampling for Quasiparticle Interference Imaging: Quasiparticle interference imaging (QPI) offers insight into the band
structure of quantum materials from the Fourier transform of local density of
states (LDOS) maps. Their acquisition with a scanning tunneling microscope is
traditionally tedious due to ... | cond-mat_other |
Graphene may help to solve the Casimir conundrum in indium tin oxide
systems: We reconsider the long-explored problem that the magnitude of the measured
Casimir force between an Au sphere and an indium tin oxide (ITO) film decreases
significantly with no respective changes in the ITO dielectric permittivity
required ... | cond-mat_other |
Singlet-Triplet Relaxation in Two-electron Silicon Quantum Dots: We investigate the singlet-triplet relaxation process of a two electron
silicon quantum dot. In the absence of a perpendicular magnetic field, we find
that spin-orbit coupling is not the main source of singlet-triplet relaxation.
Relaxation in this regime... | cond-mat_other |
Effective Range Corrections to Three-Body Recombination for Atoms with
Large Scattering Length: Few-body systems with large scattering length a have universal properties
that do not depend on the details of their interactions at short distances. The
rate constant for three-body recombination of bosonic atoms of mass ... | cond-mat_other |
Long-range donor-acceptor electron transport mediated by alpha-helices: We study the long-range electron and energy transfer mediated by a polaron on
an $\alpha$-helix polypeptide chain coupled to donor and acceptor molecules at
opposite ends of the chain. We show that for specific parameters of the system,
an electron... | cond-mat_other |
Mass flow through solid 4He induced by the fountain effect: Using an apparatus that allows superfluid liquid 4He to be in contact with
hcp solid \4he at pressures greater than the bulk melting pressure of the
solid, we have performed experiments that show evidence for 4He mass flux
through the solid and the likely pres... | cond-mat_other |
Network reachability of real-world contact sequences: We use real-world contact sequences, time-ordered lists of contacts from one
person to another, to study how fast information or disease can spread across
network of contacts. Specifically we measure the reachability time -- the
average shortest time for a series of... | cond-mat_other |
Investigation of the Casimir interaction between two magnetic metals in
comparison with nonmagnetic test bodies: We present the complete results for the dynamic experiment on measuring the
gradient of the Casimir force between magnetic (Ni-coated) surfaces of a plate
and a sphere. Special attention is paid to the des... | cond-mat_other |
Formation of stationary electronic states in finite homogeneous
molecular chains: Evolution of an arbitrary initial distribution of a quantummechanical
particle in a uniform molecular chain is simulated by a system of coupled
quantumclassical dynamical equations with dissipation. Stability of a uniform
distribution o... | cond-mat_other |
Gravity through the prism of condensed matter physics: In the paper "Life, the Universe, and everything--42 fundamental questions",
Roland Allen and Suzy Lidstr\"om presented personal selection of the
fundamental questions. Here, based on the condensed matter experience, we
suggest the answers to some questions concern... | cond-mat_other |
Electronic states in a magnetic quantum-dot molecule: phase transitions
and spontaneous symmetry breaking: We show that a double quantum-dot system made of diluted magnetic
semiconductor behaves unlike usual molecules. In a semiconductor double quantum
dot or in a diatomic molecule, the ground state of a single carri... | cond-mat_other |
Attophysics of Thermal Phenomena in Carbon Nanotubes: In this paper heat transport in carbon nanotubes is investigated. When the
dimension of the structure is of the order of the de Broglie wave length
transport phenomena must be analysed by quantum mechanics. In this paper we
derived the Dirac type thermal equation .T... | cond-mat_other |
Minimal size of a barchan dune: Barchans are dunes of high mobility which have a crescent shape and propagate
under conditions of unidirectional wind. However, sand dunes only appear above
a critical size, which scales with the saturation distance of the sand flux [P.
Hersen, S. Douady, and B. Andreotti, Phys. Rev. Let... | cond-mat_other |
Experimental evidence of solitary wave interaction in Hertzian chains: We study experimentally the interaction between two solitary waves that
approach one to another in a linear chain of spheres interacting via the Hertz
potential. When these counter propagating waves collide, they cross each other
and a phase shift r... | cond-mat_other |
Transient heat transfer of superfluid $^4$He in nonhomogeneous
geometries -- Part I: Second sound, rarefaction, and thermal layer: Transient heat transfer in superfluid $^4$He (He II) is a complex process
that involves the interplay of the unique counterflow heat-transfer mode, the
emission of second-sound waves, and... | cond-mat_other |
Dynamics of the Bose-Hubbard model: transition from Mott insulator to
superfluid: We study the dynamics of phase transitions in the one dimensional
Bose-Hubbard model. To drive the system from Mott insulator to superfluid
phase, we change the tunneling frequency at a finite rate. We investigate the
build up of correl... | cond-mat_other |
Non-local pair correlations in the 1D Bose gas at finite temperature: The behavior of the spatial two-particle correlation function is surveyed in
detail for a uniform 1D Bose gas with repulsive contact interactions at finite
temperatures. Both long-, medium-, and short-range effects are investigated.
The results span ... | cond-mat_other |
Mean-field algebraic approach to the dynamics of fermions in a 1D
optical lattice: We consider a one-dimensional optical lattice of three-dimensional Harmonic
Oscillators which are loaded with neutral fermionic atoms trapped into two
hyperfine states. By means of a standard variational coherent-state procedure,
we de... | cond-mat_other |
The unitary three-body problem in a trap: We consider either 3 spinless bosons or 3 equal mass spin-1/2 fermions,
interacting via a short range potential of infinite scattering length and
trapped in an isotropic harmonic potential. For a zero-range model, we obtain
analytically the exact spectrum and eigenfunctions: fo... | cond-mat_other |
Nonanalyticity of the optimized effective potential with finite basis
sets: We show that the finite-basis optimized effective potential (OEP) equations
exhibit previously unknown singular behavior.Imposing continuity, we derive new
well-behaved finite-basis-set OEP equations that determine OEP for any orbital
and any... | cond-mat_other |
Numerical Modeling of Coexistence, Competition and Collapse of Rotating
Spiral Waves in Three-Level Excitable Media with Discrete Active Centers and
Absorbing Boundaries: Spatio-temporal dynamics of excitable media with discrete three-level active
centers (ACs) and absorbing boundaries is studied numerically by mea... | cond-mat_other |
Second layer crystalline phase of helium films on graphite: We investigate theoretically the existence at low temperature of a
commensurate (4/7) crystalline phase of a layer of either He isotope on top of
a He-4 layer adsorbed on graphite. We make use of a recently developed,
systematically improvable variational appr... | cond-mat_other |
k^-3 superfluid spectrum of highly curved interacting quantum vortices: Presented is a prediction, based on the Frenet-Serret differential geometry
of space curves, that the wave number dependence of the average kinetic energy
per unit length of two mutually interacting highly curved quantum vortex scales
as k^-3. The ... | cond-mat_other |
Asymmetry of Endofullerenes with Silver Atoms: A series of endofullerenes Ag@C60 with different symmetry are calculated at
ab initio level. The lowest energy structure is completely asymmetrical one
(C1), in which the endo-atom has noticeably off-centre position. The
symmetrical structures are less stable. Silver atom ... | cond-mat_other |
Relaxation of a Goldstino-like mode due to supersymmetry breaking in
Bose-Fermi mixtures: In the presence of nonrelativistic supersymmetry, a sharp fermionic
collective mode similar to the Goldstino mode in high-energy physics was
proposed to be realized in Bose-Fermi mixtures. The Goldstino mode is relaxed
(a.k.a. d... | cond-mat_other |
Spin dynamics in high-mobility two-dimensional electron systems: Understanding the spin dynamics in semiconductor heterostructures is highly
important for future semiconductor spintronic devices. In high-mobility
two-dimensional electron systems (2DES), the spin lifetime strongly depends on
the initial degree of spin p... | cond-mat_other |
Guided Quasicontinuous Atom Laser: We report the first realization of a guided quasicontinuous atom laser by rf
outcoupling a Bose-Einstein condensate from a hybrid optomagnetic trap into a
horizontal atomic waveguide. This configuration allows us to cancel the
acceleration due to gravity and keep the de Broglie wavele... | cond-mat_other |
Topology of chiral superfluid: skyrmions, Weyl fermions and chiral
anomaly: Chiral anomaly observed in the chiral superfluid $^3$He-A is the result of
the combined effect of the real space and momentum space topologies. This
effect incorporates several topological charges in the extended $({\bf k},{\bf
r})$-space, wh... | cond-mat_other |
Supersolid phases of light in extended Jaynes-Cummings-Hubbard systems: Jaynes-Cummings-Hubbard lattices provide unique properties for the study of
correlated phases as they exhibit convenient state preparation and measurement,
as well as "in situ" tuning of parameters. We show how to realize charge
density and superso... | cond-mat_other |
Dynamic structure factor of liquid 4He across the normal-superfluid
transition: We have carried out a microscopic study of the dynamic structure factor of
liquid $^4$He across the normal-superfluid transition temperature using the
path integral Monte Carlo method. The ill-posed problem of the inverse Laplace
transfor... | cond-mat_other |
Coherent tunneling by adiabatic passage in an optical waveguide system: We report on the first experimental demonstration of light transfer in an
engineered triple-well optical waveguide structure which provides a classic
analogue of Coherent Tunnelling by Adiabatic Passage (CTAP) recently proposed
for coherent transpo... | cond-mat_other |
Zitterbewegung of moiré excitons in twisted MoS$_2$/WSe$_2$
hetero-bilayers: The moir\'e pattern observed in stacked non-commensurate crystal lattices,
such as hetero-bilayers of transition metal dichalcogenides, produces a
periodic modulation of their bandgap. Excitons subjected to this potential
landscape exhibit a... | cond-mat_other |
Photon correlations in a two-site non-linear cavity system under
coherent drive and dissipation: We calculate the normalized second-order correlation function for a system of
two tunnel-coupled photonic resonators, each one exhibiting a single-photon
nonlinearity of the Kerr type. We employ a full quantum formulation... | cond-mat_other |
Spin dynamics triggered by sub-terahertz magnetic field pulses: Current pulses of up to 20 A and as short as 3 ps are generated by a low
temperature grown GaAs (lt-GaAs) photoconductive switch and guided through a
coplanar waveguide, resulting in a 0.6 Tesla terahertz (THz) magnetic field
pulse. The pulse length is dir... | cond-mat_other |
Experimental observation of inter-orbital coupling: Inter-orbital coupling refers to the possibility of exciting orbital states
by otherwise orthogonal non-interacting modes, a forbidden process in photonic
lattices due to an intrinsic propagation constant detuning. In this work, using
a femtosecond laser writing techn... | cond-mat_other |
Cascade of vortex loops initiated by a single reconnection of quantum
vortices: We demonstrate that a single reconnection of two quantum vortices can lead to
creation of a cascade of vortex rings. Our analysis, motivated by the
analytical solution in LIA, involves high-resolution Biot-Savart and
Gross-Pitaevskii simu... | cond-mat_other |
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