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Modification of the 3He Phase Diagram by Anisotropic Disorder: Motivated by the recent prediction that uniaxially compressed aerogel can
stabilize the anisotropic A phase over the isotropic B phase, we measure the
pressure dependent superfluid fraction of 3He entrained in 10% axially
compressed, 98% porous aerogel. We ... | cond-mat_other |
Real-space Green's function approach for intrinsic losses in x-ray
spectra: Intrinsic inelastic losses in x-ray spectra originate from excitations in an
interacting electron system due to a suddenly created core-hole. These losses
characterize the features observed in x-ray photoemission spectra (XPS), as
well Here w... | cond-mat_other |
Parametric Driving of Dark Solitons in Atomic Bose-Einstein Condensates: A dark soliton oscillating in an elongated harmonically-confined atomic
Bose-Einstein condensate continuously exchanges energy with the sound field.
Periodic optical `paddles' are employed to controllably enhance the sound
density and transfer ene... | cond-mat_other |
Glide and Superclimb of Dislocations in Solid $^4$He: Glide and climb of quantum dislocations under finite external stress,
variation of chemical potential and bias (geometrical slanting) in Peierls
potential are studied by Monte Carlo simulations of the effective string model.
We treat on unified ground quantum effect... | cond-mat_other |
Bound states of attractive Bose-Einstein condensates in shallow traps in
two and three dimensions: Using variational and numerical solutions of the mean-field Gross-Pitaevskii
equation for attractive interaction (with cubic or Kerr nonlinearity) we show
that a stable bound state can appear in a Bose-Einstein condensa... | cond-mat_other |
Effects of model approximations for electron, hole, and photon transport
in swift heavy ion tracks: The event-by-event Monte Carlo code, TREKIS, was recently developed to
describe excitation of the electron subsystems of solids in the nanometric
vicinity of a trajectory of a nonrelativistic swift heavy ion (SHI) dece... | cond-mat_other |
A Single Cluster Covering for Dodecagonal Quasiperiodic Structure: Single cluster covering approach provides a plausible mechanism for the
formation and stability of octagonal and decagonal quasiperiodic structures.
For dodecagonal quasiperiodic pattern such a single cluster covering scheme is
still unavailable. Here w... | cond-mat_other |
Dynamical symmetry in spinor Bose-Einstein condensates: We demonstrate that dynamical symmetry plays a crucial role in determining
the structure of the eigenspectra of spinor Bose-Einstein condensates (BECs).
In particular, the eigenspectra of spin- 1 and spin-2 BECs in the single-mode
approximation are shown to be com... | cond-mat_other |
Optical whirlpool near absorbing metallic nanoparticle: The power-flow lines of light interacting with a metallic nanoparticle, in
the proximity of its plasmon resonance, form whirlpool-like nanoscale optical
vortices. Two different types of vortex have been detected. The outward vortex
first penetrates the particle ne... | cond-mat_other |
Induced Time-Reversal Symmetry Breaking Observed in Microwave Billiards: Using reciprocity, we investigate the breaking of time-reversal (T) symmetry
due to a ferrite embedded in a flat microwave billiard. Transmission spectra of
isolated single resonances are not sensitive to T-violation whereas those of
pairs of near... | cond-mat_other |
Reconsideration of Second Harmonic Generation from neat Air/Water
Interface: Broken of Kleinman Symmetry from Dipolar Contribution: It has been generally accepted that there are significant quadrupolar and
bulk contributions to the second harmonic generation (SHG) reflected from the
neat air/water interface, as well ... | cond-mat_other |
Rare-earth solid-state qubits: Quantum bits (qubits) are the basic building blocks of any quantum computer.
Superconducting qubits have been created with a 'top-down' approach that
integrates superconducting devices into macroscopic electrical circuits [1-3],
whereas electron-spin qubits have been demonstrated in quant... | cond-mat_other |
Tunneling time and Faraday/Kerr effects in $\mathcal{PT}$-symmetric
systems: We review the generalization of tunneling time and anomalous behaviour of
Faraday and Kerr rotation angles in parity and time
($\mathcal{P}\mathcal{T}$)-symmetric systems. Similarities of two phenomena are
discussed, both exhibit a phase tra... | cond-mat_other |
General Form of Magnetization Damping: Magnetization dynamics of a spin
system evolving nonadiabatically and out of equilibrium: Using an effective Hamiltonian including the Zeeman and internal
interactions, we describe the quantum theory of magnetization dynamics when the
spin system evolves non-adiabatically and ou... | cond-mat_other |
Quantum tunneling of magnetization in dipolar spin-1 condensates under
external fields: We study the macroscopic quantum tunneling of magnetization of the F=1 spinor
condensate interacting through dipole-dipole interaction with an external
magnetic field applied along the longitudinal or transverse direction. We show... | cond-mat_other |
Three component fermion pairing in two dimensions: We study pairing of an interacting three component Fermi gas in two
dimensions. By using a mean field theory to decouple the interactions between
different pairs of Fermi components, we study the free energy landscapes as a
function of various system parameters includi... | cond-mat_other |
Phonon-induced Exciton Dephasing in Quantum Dot Molecules: A new microscopic approach to the optical transitions in quantum dots and
quantum dot molecules, which accounts for both diagonal and non-diagonal
exciton-phonon interaction, is developed. The cumulant expansion of the linear
polarization is generalized to a mu... | cond-mat_other |
Capillary wave turbulence on a spherical fluid surface in low gravity: We report the observation of capillary wave turbulence on the surface of a
fluid layer in a low-gravity environment. In such conditions, the fluid covers
all the internal surface of the spherical container which is submitted to
random forcing. The s... | cond-mat_other |
Imaging interferometry of excitons in two-dimensional structures: Can it
detect exciton coherence: Using the theory of imaging with partially coherent light, we derive general
expressions for different kinds of interferometric setups like double slit,
shift and mirror interference. We show that in all cases the inter... | cond-mat_other |
Motion of discrete solitons assisted by nonlinearity management: We demonstrate that periodic modulation of the nonlinearity coefficient in
the discrete nonlinear Schr\"{o}dinger (DNLS) equation can strongly facilitate
creation of traveling solitons in the lattice. We predict this possibility in
an analytical form, and... | cond-mat_other |
Binding Energies of 6Li p-wave Feshbach Molecules: We present measurements of the binding energies of $^6$Li p-wave Feshbach
molecules formed in combinations of the (F = 1/2, m_F = +1/2), (1), and (F =
1/2, m_F = -1/2), (2), states. The binding energies scale linearly with
magnetic field detuning for all three resonanc... | cond-mat_other |
Tunable Quantum Fluctuation-Controlled Coherent Spin Dynamics: Temporal evolution of a macroscopic condensate of ultra cold atoms is usually
driven by mean field potentials, either due to scattering between atoms or due
to coupling to external fields; and coherent quantum dynamics have been
observed in various cold-ato... | cond-mat_other |
A model for luminescence of localized state ensemble: A distribution function for localized carriers,
$f(E,T)=\frac{1}{e^{(E-E_a)/k_BT}+\tau_{tr}/\tau_r}$, is proposed by solving a
rate equation, in which, electrical carriers' generation, thermal escape,
recapture and radiative recombination are taken into account. Bas... | cond-mat_other |
Estimating Probabilities of Default for Low Default Portfolios: For credit risk management purposes in general, and for allocation of
regulatory capital by banks in particular (Basel II), numerical assessments of
the credit-worthiness of borrowers are indispensable. These assessments are
expressed in terms of probabili... | cond-mat_other |
On the Nature of Spin Currents: Full expressions for finite frequency spin and charge conductivity in Rashba
and Luttinger type systems are given. Whereas in the Rashba Hamiltonian the
spin conductivity has the same frequency dependence as the dielectric
polarizability, the Luttinger case is different. Moreover, for a ... | cond-mat_other |
Local and non-local energy spectra of superfluid $^3$He turbulence: Below the phase transition temperature $Tc \simeq 10^{-3}$K He-3B has a
mixture of normal and superfluid components. Turbulence in this material is
carried predominantly by the superfluid component. We explore the statistical
properties of this quantum... | cond-mat_other |
Spin dynamics characterization in magnetic dots: The spin structure in a magnetic dot, which is an example of a quantum
few-body system, is studied as a function of exchange coupling strength and dot
size with in the semiclassical approximation on a discrete lattice. As the
exchange coupli ng is decreased or the size i... | cond-mat_other |
Bistability in a magnetic and nonmagnetic double-quantum-well structure
mediated by the magnetic phase transition: The hole distribution in a double quantum well (QW) structure consisting of a
magnetic and a nonmagnetic semiconductor QW is investigated as a function of
temperature, the energy shift between the QWs, a... | cond-mat_other |
Theoretical Analysis of Functionally Graded Piezoelectric Thick-walled
Cylinder Subjected to Mechanical and Electric Loadings: In this paper, the theoretical analysis for a hollow thick-walled
functionally graded piezoelectric cylinder subjected to electric and mechanical
loads are developed. The cylinder consists of... | cond-mat_other |
Density Matrix Renormalization Group for Dummies: We describe the Density Matrix Renormalization Group algorithms for time
dependent and time independent Hamiltonians. This paper is a brief but
comprehensive introduction to the subject for anyone willing to enter in the
field or write the program source code from scrat... | cond-mat_other |
Quantum complementarity of microcavity polaritons: We present an experiment that probes polariton quantum correlations by
exploiting quantum complementarity. Specifically, we find that polaritons in
two distinct idler-modes interfere if and only if they share the same
signal-mode so that "which-way" information cannot ... | cond-mat_other |
Creating a supersolid in one-dimensional Bose mixtures: We identify a one-dimensional supersolid phase in a binary mixture of
near-hardcore bosons with weak, local inter-species repulsion. We find
realistic conditions under which such a phase, defined here as the coexistence
of quasi-superfluidity and quasi-charge dens... | cond-mat_other |
Stability of superfluid and supersolid phases of dipolar bosons in
optical lattices: We perform a stability analysis of superfluid (SF) and supersolid (SS) phases
of polarized dipolar bosons in two-dimensional optical lattices at high filling
factors and zero temperature, and obtain the phase boundaries between SF,
c... | cond-mat_other |
Frenkel-Kontorova model with cold trapped ions: We study analytically and numerically the properties of one-dimensional chain
of cold ions placed in a periodic potential of optical lattice and global
harmonic potential of a trap. In close similarity with the Frenkel-Kontorova
model, a transition from sliding to pinned ... | cond-mat_other |
Pure spin current from one-photon absorption of linearly polarized light
in noncentrosymmetric semiconductors: We show that one-photon absorption of linearly polarized light should produce
pure spin currents in noncentrosymmetric semiconductors, including even bulk
GaAs. We present 14x14 k.p model calculations of the... | cond-mat_other |
First-principles calculation of the Gilbert damping parameter via the
linear response formalism with application to magnetic transition-metals and
alloys: A method for the calculations of the Gilbert damping parameter $\alpha$ is
presented, which based on the linear response formalism, has been implemented
within t... | cond-mat_other |
Aharonov-Bohm interferences from local deformations in graphene: One of the most interesting aspects of graphene is the tied relation between
structural and electronic properties. The observation of ripples in the
graphene samples both free standing and on a substrate has given rise to a very
active investigation aroun... | cond-mat_other |
Electron-nuclear spin dynamics of Ga$^{2+}$ paramagnetic centers probed
by spin dependent recombination: A master equation approach: Similar to nitrogen-vacancy centers in diamond and impurity atoms in silicon,
interstitial gallium deep paramagnetic centers in GaAsN have been proven to
have useful characteristics for... | cond-mat_other |
Comment on "Critique of the foundations of time-dependent density
functional theory" [Phys. Rev.A. 75, 022513 (2007)]: A recent paper (Phys. Rev A. 75, 022513 (2007), arXiv:cond-mat/0602020)
challenges exact time-dependent density functional theory (TDDFT) on several
grounds. We explain why these criticisms are eithe... | cond-mat_other |
Spin Seebeck Effect: Amplification of Spin Waves by Thermal Torque: We observe amplification of spin-wave packets propagating along a film of
yttrium iron garnet (YIG) subject to a transverse temperature gradient. The
amplification is attributed to a spin-transfer thermal torque created by spin
currents generated by me... | cond-mat_other |
Fundamental limits for non-destructive measurement of a single spin by
Faraday rotation: Faraday rotation being a dispersive effect, is commonly considered as the
method of choice for non-destructive detection of spin states. Nevertheless
Faraday rotation is inevitably accompanied by spin-flips induced by Raman
scatt... | cond-mat_other |
Deuteron Momentum Distribution in KD2HPO4: The momentum distribution in KD2PO4(DKDP) has been measured using neutron
Compton scattering above and below the weakly first order
paraelectric-ferroelectric phase transition(T=229K). There is very litte
difference between the two distributions, and no sign of the coherence o... | cond-mat_other |
Are high-energy photoemission final states free-electron-like?: Three-dimensional (3D) electronic band structure is fundamental for
understanding a vast diversity of physical phenomena in solid-state systems,
including topological phases, interlayer interactions in van der Waals
materials, dimensionality-driven phase t... | cond-mat_other |
A consistent description of the iron dimer spectrum with a correlated
single-determinant wave function: We study the iron dimer by using an accurate ansatz for quantum chemical
calculations based on a simple variational wave function, defined by a single
geminal expanded in molecular orbitals and combined with a real... | cond-mat_other |
Intense slow beams of bosonic potassium isotopes: We report on an experimental realization of a two-dimensional magneto-optical
trap (2D-MOT) that allows the generation of cold atomic beams of 39K and 41K
bosonic potassium isotopes. The high measured fluxes up to 1.0x10^11 atoms/s
and low atomic velocities around 33 m/... | cond-mat_other |
Chiral charge-density-waves: We discovered the chirality of charge density waves (CDW) in 1T-TiSe$_2$ by
using scanning tunnelling microscopy (STM) and optical ellipsometry. We found
that the CDW intensity becomes $I{a_1}:I{a_2}:I{a_3} = 1:0.7 \pm 0.1:0.5 \pm
0.1$, where $Ia_i$ (i =1, 2, 3) is the amplitude of the tunn... | cond-mat_other |
Spectroscopy of Strong-Pulse Superradiance in a Bose-Einstein condensate: We study experimentally superradiance in a Bose-Einstein condensate using a
two-frequency pump beam. By controlling the frequency difference between the
beam components, we measure the spectrum of the backward (energy-mismatched)
superradiant ato... | cond-mat_other |
Thermal Fluctuations of the Electric Field in the Presence of Carrier
Drift: We consider a semiconductor in a non-equilibrium steady state, with a dc
current. On top of the stationary carrier motion there are fluctuations. It is
shown that the stationary motion of the carriers (i.e., their drift) can have a
profound ... | cond-mat_other |
Topological Constraints on the Charge Distributions for the Thomson
Problem: The method of Morse theory is used to analyze the distributions of unit
charges interacting through a repulsive force and constrained to move on the
surface of a sphere -- the Thomson problem. We find that, due to topological
reasons, the sy... | cond-mat_other |
Combined chips for atom-optics: We present experiments with Bose-Einstein condensates on a combined atom
chip. The combined structure consists of a large-scale "carrier chip" and
smaller "atom-optics chips", containing micron-sized elements. This allows us
to work with condensates very close to chip surfaces without su... | cond-mat_other |
Quantum Non-Demolition Detection of Strongly Correlated Systems: Preparation, manipulation, and detection of strongly correlated states of
quantum many body systems are among the most important goals and challenges of
modern physics. Ultracold atoms offer an unprecedented playground for
realization of these goals. Here... | cond-mat_other |
Energy flow of moving dissipative topological solitons: We study the energy flow due to the motion of topological solitons in
nonlinear extended systems in the presence of damping and driving. The total
field momentum contribution to the energy flux, which reduces the soliton
motion to that of a point particle, is insu... | cond-mat_other |
Comparison study of DFA and DMA methods in analysis of autocorrelations
in time series: Statistics of the Hurst scaling exponents calculated with the use of two
methods: recently introduced Detrended Moving Average Analysis(DMA) and
Detrended Fluctuation Analysis (DFA)are compared. Analysis is done for
artificial sto... | cond-mat_other |
Quantum dynamics of two bosons in an anharmonic trap: Collective vs
internal excitations: This work deals with the effects of an anharmonic trap on an interacting
two-boson system in one dimension. Our primary focus is on the role of the
induced coupling between the center of mass and the relative motion as both
anha... | cond-mat_other |
Temporal dynamics of tunneling. Hydrodynamic approach: We use the hydrodynamic representation of the Gross -Pitaevskii/Nonlinear
Schroedinger equation in order to analyze the dynamics of macroscopic tunneling
process. We observe a tendency to a wave breaking and shock formation during
the early stages of the tunneling ... | cond-mat_other |
Nonlinear intraband tunneling of BEC in a cubic three-dimensional
lattice: The intra-band tunneling of a Bose-Einstein condensate between three
degenerate high-symmetry X-points of the Brillouin zone of a cubic optical
lattice is studied in the quantum regime by reduction to a three-mode model.
The mean-field approxi... | cond-mat_other |
Evolution of a quantum spin system to its ground state: Role of
entanglement and interaction symmetry: We study the decoherence of two ferro- and antiferromagnetically coupled
spins that interact with a frustrated spin-bath environment in its ground
state. The conditions under which the two-spin system relaxes from t... | cond-mat_other |
Comment on "Fully covariant radiation force on a polarizable particle": Recently Pieplow and Henkel (PH) (NJP \textbf{15} (2013) 023027) presented a
new fully covariant theory of the Casimir friction force acting on small
neutral particle moving parallel to flat surface. We compare results of this
theory with results w... | cond-mat_other |
Conditions for the Existence of Polaron States in Classical Molecular
Chains at Finite Temperatures: Today in many articles the polaron states are calculated in classical
molecular chains for zero temperature. At the same time it is assumed that
polaron properties do not change significantly, if the temperature is no... | cond-mat_other |
Complex Envelope Soliton in Bose-Einstein Condensate with Time Dependent
Scattering Length: We elaborate on a general method to find complex envelope solitons in a cigar
shaped Bose-Einstein condensate in a trap. The procedure incorporates time
dependent scattering length, oscillator frequency and loss/gain. A variet... | cond-mat_other |
Importance of bath dynamics for decoherence in spin systems: We study the decoherence of two coupled spins that interact with a chaotic
spin-bath environment. It is shown that connectivity of spins in the bath is of
crucial importance for the decoherence of the central system. The previously
found phenomenon of two-ste... | cond-mat_other |
Self-induced density modulations in the free expansion of Bose-Einstein
condensates: We simulate numerically the free expansion of a repulsive Bose-Einstein
condensate with an initially Gaussian density profile. We find a self-similar
expansion only for weak inter-atomic repulsion. In contrast, for strong
repulsion w... | cond-mat_other |
Continuum Mechanics for Quantum Many-Body Systems: The Linear Response
Regime: We derive a closed equation of motion for the current density of an
inhomogeneous quantum many-body system under the assumption that the
time-dependent wave function can be described as a geometric deformation of the
ground-state wave func... | cond-mat_other |
Comment on "Amplitude of waves in the Kelvin-wave cascade": In the recently published preprint arXiv:200.02610 Eltsov and L'vov
calculated the amplitudes of waves in the Kelvin-wave cascades. This returns us
to the rather old, but still unresolved dispute on the role of the tilt
symmetry and the locality in the Kelvin-... | cond-mat_other |
Spin-transfer mechanism of ferromagnetism in polymerized fullerenes: $Ab
initio$ calculations: A mechanism of the high temperature ferromagnetism in polymerized fullerenes
is suggested. It is assumed that some of the C$_{60}$ molecules in the crystal
become magnetically active due to spin and charge transfer from the... | cond-mat_other |
A Quantum Top Inside a Bose Josephson Junction: We consider an atomic quantum dot confined between two weakly-coupled
Bose-Einstein condensates, where the dot serves as an additional tunneling
channel. It is shown that the thus-embedded atomic quantum dot is a pseudospin
subject to an external torque, and therefore equ... | cond-mat_other |
Dark state experiments with ultracold, deeply-bound triplet molecules: We examine dark quantum superposition states of weakly bound Rb2 Feshbach
molecules and tightly bound triplet Rb2 molecules in the rovibrational ground
state, created by subjecting a pure sample of Feshbach molecules in an optical
lattice to a bichr... | cond-mat_other |
Ground State and Tkachenko Modes of a Rapidly Rotating Bose-Einstein
Condensate in the Lowest Landau Level State: The Letter considers the ground state and the Tkachenko modes for a rapidly
rotating Bose-Einstein condensate (BEC), when its macroscopic wave function is
a coherent superposition of states analogous to t... | cond-mat_other |
A Twisted Pair Cryogenic Filter: In low temperature transport measurements, there is frequently a need to
protect a device at cryogenic temperatures from thermal noise originating in
warmer parts of the experiment. There are also a wide range of experiments,
such as high precision transport measurements on low impedanc... | cond-mat_other |
The Moment Map: Nonlinear dynamics of density evolution via a few
moments: We explore situations in which certain stochastic and high-dimensional
deterministic systems behave effectively as low-dimensional dynamical systems.
We define and study moment maps, maps on spaces of low-order moments of
evolving distribution... | cond-mat_other |
Optical properties of atomic Mott insulators: from slow light to
dynamical Casimir effects: We theoretically study the optical properties of a gas of ultracold,
coherently dressed three-level atoms in a Mott insulator phase of an optical
lattice. The vacuum state, the band dispersion and the absorption spectrum of
th... | cond-mat_other |
Intrinsic relation between ground-state fidelity and the
characterization of a quantum phase transition: The notion of fidelity in quantum information science has been recently
applied to analyze quantum phase transitions from the viewpoint of the ground
state (GS) overlap for various many-body systems. In this work,... | cond-mat_other |
Coherent electronic transfer in quantum dot systems using adiabatic
passage: We describe a scheme for using an all-electrical, rapid, adiabatic population
transfer between two spatially separated dots in a triple-quantum dot system.
The electron spends no time in the middle dot and does not change its energy
during t... | cond-mat_other |
Molecular-dynamics simulation of clustering processes in sea-ice floes: In seasonally ice-covered seas and along the margins of perennial ice pack,
i.e. in regions with medium ice concentrations, the ice cover typically
consists of separate floes interacting with each other by inelastic collisions.
In this paper, hithe... | cond-mat_other |
Two roads to antispacetime in polar distorted B phase: Kibble wall and
half-quantum vortex: We consider the emergent tetrad gravity and the analog of antispacetime
realized in the recent experiments ( J.T. Makinen, et al., Nat. Comm. 10, 237
(2019)) on the composite defects in superfluid $^3$He: the Kibble walls boun... | cond-mat_other |
Collisions between tunable halo dimers: exploring an elementary
four-body process with identical bosons: We study inelastic collisions in a pure, trapped sample of Feshbach molecules
made of bosonic cesium atoms in the quantum halo regime. We measure the
relaxation rate coefficient for decay to lower-lying molecular ... | cond-mat_other |
Single-atom doping for quantum device development in diamond and silicon: The ability to inject dopant atoms with high spatial resolution, flexibility
in dopant species and high single ion detection fidelity opens opportunities
for the study of dopant fluctuation effects and the development of devices in
which function... | cond-mat_other |
Energy concentration in composite quantum systems: The spontaneous emission of photons from optical cavities and from trapped
atoms has been studied extensively in the framework of quantum optics.
Theoretical predictions based on the rotating wave approximation (RWA) are in
general in very good agreement with experimen... | cond-mat_other |
A controllable nanomechanical memory element: We report the realization of a completely controllable high-speed
nanomechanical memory element fabricated from single-crystal silicon wafers.
This element consists of a doubly-clamped suspended nanomechanical beam
structure, which can be made to switch controllably between... | cond-mat_other |
On the Transition to Turbulence of Oscillatory Flow of Liquid Helium-4: Oscillating solid bodies have frequently been used for studying the
properties of normal and superfluid helium. In particular, the transition from
laminar flow to turbulence has attracted much interest recently. The purpose of
this note is to revie... | cond-mat_other |
Motional Averaging of Nuclear Resonance in a Field Gradient: The traditional view of nuclear-spin decoherence in a field gradient due to
molecular self-diffusion is challenged on the basis of temperature dependence
of the linewidth, which demonstrates different behaviors between liquids and
gases. The conventional theo... | cond-mat_other |
Electron dynamics in vacancy islands: The dynamics of Ag(111) surface state electrons confined to nanoscale
hexagonal and triangular vacancy islands are investigated using scanning
tunneling spectroscopy. The lifetimes of quantised states with significant
amplitude near the centers of the vacancies are weakly affected ... | cond-mat_other |
Current-induced interactions of multiple domain walls in magnetic
quantum wires: We show that an applied charge current in a magnetic nanowire containing
domain walls (DWs) results in an interaction between DWs mediated by
spin-dependent interferences of the scattered carriers. The energy and torque
associated with t... | cond-mat_other |
Natural Negative-Refractive-Index Materials: Our calculation shows that negative refractive index (NRI), which was known
to exist only in metamaterials in the past, can be found in Dirac semimetals
(DSM). Electrons in DSM have zero effective mass and hence the system carries
no nominal energy scale. Therefore, unlike t... | cond-mat_other |
An Investigation of Mean-field Effects for a Bose Condensate in an
Optical Lattice: This paper presents a mean-field numerical analysis, using the full
three-dimensional time-dependent Gross-Pitaevskii equation (GPE), of an
experiment carried out by Orzel et al. [Science 291, 2386 (2001)] intended to
show number sque... | cond-mat_other |
The free surface of superfluid 4He at zero temperature: The structure and energetics of the free surface of superfluid $^4$He are
studied using the diffusion Monte Carlo method. Extending a previous
calculation by Vall\'es and Schmidt, which used the Green's function Monte
Carlo method, we study the surface of liquid $... | cond-mat_other |
Topological Constraints on the Charge Distributions for the Thomson
Problem: The method of Morse theory is used to analyze the distributions of unit
charges interacting through a repulsive force and constrained to move on the
surface of a sphere -- the Thomson problem. We find that, due to topological
reasons, the sy... | cond-mat_other |
Measuring the spin polarization and Zeeman energy of a spin-polarized
electron gas: Comparison between Raman scattering and photoluminescence: We compare resonant electronic Raman scattering and photoluminescence
measurements for the characterization of a spin-polarized two-dimensional
electron gas embedded in $\text... | cond-mat_other |
Bipartite Yule Processes in Collections of Journal Papers: Collections of journal papers, often referred to as 'citation networks', can
be modeled as a collection of coupled bipartite networks which tend to exhibit
linear growth and preferential attachment as papers are added to the
collection. Assuming primary nodes i... | cond-mat_other |
Quantum fluid effects and parametric instabilities in microcavities: We present a description of the non-equilibrium properties of a microcavity
polariton fluid, injected by a nearly-resonant continuous wave pump laser. In
the first part, we point out the interplay between the peculiar dispersion of
the Bogolubov-like ... | cond-mat_other |
Transport and recombination through weakly coupled localized spin pairs
in semiconductors during coherent spin excitation: Semi-analytical predictions for the transients of spin-dependent transport
and recombination rates through localized states in semiconductors during
coherent electron spin excitation are made for... | cond-mat_other |
Quantum Monte Carlo study of ring-shaped polariton parametric
luminescence in a semiconductor microcavity: We present a quantum Monte Carlo study of the quantum correlations in the
parametric luminescence from semiconductor microcavities in the strong
exciton-photon coupling regime. As already demonstrated in recent ... | cond-mat_other |
Effect of interactions on the localization of a Bose-Einstein condensate
in a quasi-periodic lattice: The transport properties of a Bose-Einstein condensate in a 1D incommensurate
bichromatic lattice are investigated both theoretically and experimentally. We
observe a blockage of the center of mass motion with low at... | cond-mat_other |
Alignment of the Diamond Nitrogen Vacancy Center by Strain Engineering: The nitrogen vacancy (NV) center in diamond is a sensitive probe of magnetic
field and a promising qubit candidate for quantum information processing. The
performance of many NV-based devices improves by aligning the NV(s) parallel to
a single crys... | cond-mat_other |
Current-induced spin torques in III-V ferromagnetic semiconductors: We formulate a theory of current-induced spin torques in inhomogeneous III-V
ferromagnetic semiconductors. The carrier spin-3/2 and large spin-orbit
interaction, leading to spin non-conservation, introduce significant conceptual
differences from spin t... | cond-mat_other |
Electron inelastic mean free paths in condensed matter down to a few
electronvolts: A method is reported for a simple, yet reliable, calculation of electron
inelastic mean free paths in condensed phase insulating and conducting
materials, from the very low energies of hot electrons up to the high energies
characteris... | cond-mat_other |
Numerical Study on Entrance Length in Thermal Counterflow of Superfluid
$^4$He: Three-dimensional numerical simulations in a square duct were conducted to
investigate entrance lengths of normal fluid and superfluid flows in a thermal
counterflow of superfluid $^4$He. The two fluids were coarse-grained by using
the Ha... | cond-mat_other |
Many-body perturbation theory using the density-functional concept:
beyond the GW approximation: We propose an alternative formulation of Many-Body Perturbation Theory that
uses the density-functional concept. Instead of the usual four-point integral
equation for the polarizability, we obtain a two-point one, that le... | cond-mat_other |
Influence of the substrate lattice structure on the formation of Quantum
Well States in thin In and Pb films on silicon: The substrate lattice structure may have a considerable influence on the
formation of quantum well states in a metal overlayer material. Here we study
three model systems using angle resolved photo... | cond-mat_other |
Supersolids in one dimensional Bose Fermi mixtures: Using quantum Monte Carlo simulations, we study a mixture of bosons and
fermions loaded on an optical lattice. With simple on-site repulsive
interactions, this system can be driven into a solid phase. We dope this phase
and, in analogy with pure bosonic systems, ident... | cond-mat_other |
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