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Observation of self-oscillating supersonic flow across an acoustic
horizon in two dimensions: Understanding the dynamics and stability of transonic flows in quantum
fluids, especially for those beyond one spatial dimension, is an outstanding
challenge, with applications ranging from nonlinear optics and condensed mat... | cond-mat_quant-gas |
Quantum glass of interacting bosons with off-diagonal disorder: We study disordered interacting bosons described by the Bose-Hubbard model
with Gaussian-distributed random tunneling amplitudes. It is shown that the
off-diagonal disorder induces a spin-glass-like ground state, characterized by
randomly frozen quantum-me... | cond-mat_quant-gas |
From Nodal Ring Topological Superfluids to Spiral Majorana Modes in Cold
Atomic Systems: In this work, we consider a 3D cubic optical lattice composed of coupled 1D
wires with 1D spin-orbit coupling. When the s-wave pairing is induced through
Feshbach resonance, the system becomes a topological superfluid with ring
n... | cond-mat_quant-gas |
OpenMP Fortran programs for solving the time-dependent dipolar
Gross-Pitaevskii equation: In this paper we present Open Multi-Processing (OpenMP) Fortran 90/95
versions of previously published numerical programs for solving the dipolar
Gross-Pitaevskii (GP) equation including the contact interaction in one, two
and t... | cond-mat_quant-gas |
Universal van der Waals Force Between Heavy Polarons in Superfluids: We investigate the long-range behavior of the induced Casimir interaction
between two spinless heavy impurities, or polarons, in superfluid cold atomic
gases. With the help of effective field theory (EFT) of a Galilean invariant
superfluid, we show th... | cond-mat_quant-gas |
Symmetry analysis of crystalline spin textures in dipolar spinor
condensates: We study periodic crystalline spin textures in spinor condensates with
dipolar interactions via a systematic symmetry analysis of the low-energy
effective theory. By considering symmetry operations which combine real and
spin space operatio... | cond-mat_quant-gas |
Cavity-mediated unconventional pairing in ultracold fermionic atoms: We investigate long-range pairing interactions between ultracold fermionic
atoms confined in an optical lattice which are mediated by the coupling to a
cavity. In the absence of other perturbations, we find three degenerate pairing
symmetries for a tw... | cond-mat_quant-gas |
Collective excitations of exciton-polariton condensates in a synthetic
gauge field: Collective (elementary) excitations of quantum bosonic condensates, including
condensates of exciton polaritons in semiconductor microcavities, are a
sensitive probe of interparticle interactions. In anisotropic microcavities
with mom... | cond-mat_quant-gas |
Sudden and slow quenches into the antiferromagnetic phase of ultracold
fermions: We propose a method to reach the antiferromagnetic state of two-dimensional
Fermi gases trapped in optical lattices: Independent subsystems are prepared in
suitable initial states and then connected by a sudden or slow quench of the
tunn... | cond-mat_quant-gas |
Quantum dynamics of a binary mixture of BECs in a double well potential:
an Holstein-Primakoff approach: We study the quantum dynamics of a binary mixture of Bose-Einstein
condensates (BEC) in a double-well potential starting from a two-mode
Bose-Hubbard Hamiltonian. Focussing on the regime where the number of atoms ... | cond-mat_quant-gas |
Doping a lattice-trapped bosonic species with impurities: From ground
state properties to correlated tunneling dynamics: We investigate the ground state properties and the nonequilibrium dynamics of
a lattice trapped bosonic mixture consisting of an impurity species and a
finite-sized medium. For the case of one as w... | cond-mat_quant-gas |
Parametric instabilities of interacting bosons in periodically-driven 1D
optical lattices: Periodically-driven quantum systems are currently explored in view of
realizing novel many-body phases of matter. This approach is particularly
promising in gases of ultracold atoms, where sophisticated shaking protocols
can be... | cond-mat_quant-gas |
Glass-like Behavior in a System of One Dimensional Fermions after a
Quantum Quench: We investigate the non-equilibrium relaxation dynamics of a one dimensional
system of interacting spinless fermions near the XXZ integrable point. We
observe two qualitatively different regimes: close to integrability and for low
ener... | cond-mat_quant-gas |
Fractional quantum Hall physics with ultracold Rydberg gases in
artificial gauge fields: We study ultracold Rydberg-dressed Bose gases subject to artificial gauge
fields in the fractional quantum Hall (FQH) regime. The characteristics of the
Rydberg interaction gives rise to interesting many-body ground states differ... | cond-mat_quant-gas |
Anomalous quantum-reflection of Bose-Einstein condensates as a
self-screening effect: We discuss the effect of anomalous quantum-reflection of Bose-Einstein
condensates as a screening effect, that is created by the condensate itself. We
derive an effective, time-independent single-mode approach, that allows us to
def... | cond-mat_quant-gas |
From non equilibrium quantum Brownian motion to impurity dynamics in 1D
quantum liquids: Impurity motion in one dimensional ultra cold quantum liquids confined in an
optical trap has attracted much interest recently. As a step towards its full
understanding, we construct a generating functional from which we derive t... | cond-mat_quant-gas |
A Hubbard model for ultracold bosonic atoms interacting via
zero-point-energy induced three-body interactions: We show that for ultra-cold neutral bosonic atoms held in a three-dimensional
periodic potential or optical lattice, a Hubbard model with dominant,
attractive three-body interactions can be generated. In fac... | cond-mat_quant-gas |
Thermodynamics of ideal Fermi gas under generic power law potential in
$d$-dimension: Thermodynamics of ideal Fermi gas trapped in an external generic power law
potential $U=\sum_{i=1} ^d c_i |\frac{x_i}{a_i}|^{n_i}$ are investigated
systematically from the grand thermodynamic potential in $d$ dimensional space.
Thes... | cond-mat_quant-gas |
Dirac and Weyl Rings in Three Dimensional Cold Atom Optical Lattices: Recently three dimensional topological quantum materials with gapless energy
spectra have attracted considerable interests in many branches of physics.
Besides the celebrated example, Dirac and Weyl points which possess gapless
point structures in th... | cond-mat_quant-gas |
Many-body stabilization of a resonant p-wave Fermi gas in one dimension: Using the asymptotic Bethe Ansatz, we study the stabilization problem of the
one-dimensional spin-polarized Fermi gas confined in a hard-wall potential with
tunable p-wave scattering length and finite effective range. We find that the
interplay of... | cond-mat_quant-gas |
Control of the vortex lattice formation in coupled atom-molecular
Bose-Einstein condensate in a double well potential: Role of atom-molecule
coupling, trap rotation frequency and detuning: We study the vortex formation in coupled atomic and molecular condensates in
a rotating double well trap by numerically solving... | cond-mat_quant-gas |
Rényi generalization of the operational entanglement entropy: Operationally accessible entanglement in bipartite systems of
indistinguishable particles could be reduced due to restrictions on the allowed
local operations as a result of particle number conservation. In order to
quantify this effect, Wiseman and Vaccaro ... | cond-mat_quant-gas |
Effect of finite range interactions on roton mode softening in a
multi-component BEC: We consider the Gross-Pitaevskii(GP) model of a Bose-Einstein Condensate(BEC)
for single-component and multi-component BEC. The pseudopotential for s-wave
scattering between atoms is taken to be of width of the order of the s-wave
s... | cond-mat_quant-gas |
Superfluid Bloch dynamics in an incommensurate lattice: We investigate the interplay of disorder and interactions in the accelerated
transport of a Bose-Einstein condensate through an incommensurate optical
lattice. We show that interactions can effectively cancel the damping of Bloch
oscillations due to the disordered... | cond-mat_quant-gas |
Delayed response of a fermion-pair condensate to a modulation of the
interaction strength: The effect of a sinusoidal modulation of the interaction strength on a
fermion-pair condensate is analytically studied. The system is described by a
generalization of the coupled fermion-boson model that incorporates a
time-dep... | cond-mat_quant-gas |
Drag force on a moving impurity in a spin-orbit coupled Bose-Einstein
condensate: We investigate the drag force on a moving impurity in a spin-orbit coupled
Bose-Einstein condensate. We prove rigorously that the superfluid critical
velocity is zero when the impurity moves in all but one directions, in contrast
to the... | cond-mat_quant-gas |
Dynamics of a degenerate Cs-Yb mixture with attractive interspecies
interactions: We probe the collective dynamics of a quantum degenerate Bose-Bose mixture of
Cs and $^{174}$Yb with attractive interspecies interactions. Specifically, we
excite vertical center of mass oscillations of the Cs condensate, and observe
si... | cond-mat_quant-gas |
Atomic topological quantum matter using synthetic dimensions: The realization of topological states of matter in ultracold atomic gases is
currently the subject of intense experimental activity. Using a synthetic
dimension, encoded in a non-spatial degree of freedom, can greatly simplify the
simulation of gauge fields ... | cond-mat_quant-gas |
Manifold approach for a many-body Wannier-Stark system: localization and
chaos in energy space: We study the resonant tunneling effect in a many-body Wannier-Stark system,
realized by ultracold bosonic atoms in an optical lattice subjected to an
external Stark force. The properties of the many-body system are effecti... | cond-mat_quant-gas |
Tensor networks for Lattice Gauge Theories and Atomic Quantum Simulation: We show that gauge invariant quantum link models, Abelian and non-Abelian,
can be exactly described in terms of tensor networks states. Quantum link
models represent an ideal bridge between high-energy to cold atom physics, as
they can be used in... | cond-mat_quant-gas |
Manipulation of a Bose-Einstein condensate by a time-averaged orbiting
potential using phase jumps of the rotating field: We report on the manipulation of the center-of-mass motion (`sloshing') of a
Bose Einstein condensate in a time-averaged orbiting potential (TOP) trap. We
start with a condensate at rest in the ce... | cond-mat_quant-gas |
Controllable splitting dynamics of a doubly quantized vortex in a
rotating ring-shaped condensate: We study the dynamics of a doubly quantized vortex (DQV), created by
releasing a ring-shaped Bose-Einstein condensate with quantized circulation
into harmonic potential traps. It is shown that a DQV can be generated and... | cond-mat_quant-gas |
Oscillating Quantum Droplets from the free expansion of Logarithmic
One-Dimensional Bose Gases: We analyze some issues related to the stability and free expansion of a
one-dimensional logarithmic Bose-Einstein condensate, particularly its eventual
relation to the formation of quantum droplet-type configurations. We p... | cond-mat_quant-gas |
Transport regimes of cold gases in a two-dimensional anisotropic
disorder: We numerically study the dynamics of cold atoms in a two-dimensional
disordered potential. We consider an anisotropic speckle potential and focus on
the classical regime, which is relevant to some recent experiments. First, we
study the behavi... | cond-mat_quant-gas |
Emergence of damped-localized excitations of the Mott state due to
disorder: A key aspect of ultracold bosonic quantum gases in deep optical lattice
potential wells is the realization of the strongly interacting Mott insulating
phase. Many characteristics of this phase are well understood, however little
is known abo... | cond-mat_quant-gas |
Instability of the superfluid flow as black-hole lasing effect: We show that the instability leading to the decay of the one-dimensional
superfluid flow through a penetrable barrier are due to the black-hole lasing
effect. This dynamical instability is triggered by modes resonating in an
effective cavity formed by two ... | cond-mat_quant-gas |
Atomic matter-wave revivals with definite atom number in an optical
lattice: We study the collapse and revival of interference patterns in the momentum
distribution of atoms in optical lattices, using a projection technique to
properly account for the fixed total number of atoms in the system. We consider
the common ... | cond-mat_quant-gas |
Partial Fermionization---Spectral Universality in 1D Repulsive Bose
Gases: Due to the vast growth of the many-body level density with excitation energy,
its smoothed form is of central relevance for spectral and thermodynamic
properties of interacting quantum systems. We compute the cumulative of this
level density f... | cond-mat_quant-gas |
Anisotropic and long-range vortex interactions in two-dimensional
dipolar Bose gases: We perform a theoretical study into how dipole-dipole interactions modify the
properties of superfluid vortices within the context of a two-dimensional
atomic Bose gas of co-oriented dipoles. The reduced density at a vortex acts
lik... | cond-mat_quant-gas |
Quantum and thermal fluctuations in two-component Bose gases: We study the effects of quantum and thermal fluctuations on Bose-Bose
mixtures at finite temperature employing the time-dependent
Hartree-Fock-Bogoliubov (TDHFB) theory. The theory governs selfconsistently the
motion of the condensates, the noncondensates an... | cond-mat_quant-gas |
Nambu-Goldstone modes in segregated Bose-Einstein condensates: Nambu-Goldstone modes in immiscible two-component Bose-Einstein condensates
are studied theoretically. In a uniform system, a flat domain wall is
stabilized and then the translational invariance normal to the wall is
spontaneously broken in addition to the ... | cond-mat_quant-gas |
Exact relaxation dynamics of a localized many-body state in the 1D bose
gas: Through an exact method we numerically solve the time evolution of the
density profile for an initially localized state in the one-dimensional bosons
with repulsive short-range interactions. We show that a localized state with a
density notc... | cond-mat_quant-gas |
Vortex Thermometry for Turbulent Two-Dimensional Fluids: We introduce a new method of statistical analysis to characterise the
dynamics of turbulent fluids in two dimensions. We establish that, in
equilibrium, the vortex distributions can be uniquely connected to the
temperature of the vortex gas, and apply this vortex... | cond-mat_quant-gas |
Separation induced resonances in quasi-one-dimensional ultracold atomic
gases: We study the effective one-dimensional (1D) scattering of two distinguishable
atoms confined individually by {\em separated} transverse harmonic traps. With
equal trapping frequency for two s-wave interacting atoms, we find that by
tuning ... | cond-mat_quant-gas |
Thermal fluctuations and quantum phase transition in antiferromagnetic
Bose-Einstein condensates: We develop a method for investigating nonequilibrium dynamics of an ultracold
system that is initially at thermal equilibrium. Our procedure is based on the
classical fields approximation with appropriately prepared init... | cond-mat_quant-gas |
Anderson localization and Mott insulator phase in the time domain: Particles in space periodic potentials constitute standard models for
investigation of crystalline phenomena in solid state physics. Time periodicity
of periodically driven systems is a close analogue of space periodicity of
solid state crystals. There ... | cond-mat_quant-gas |
SU(3) truncated Wigner approximation for strongly interacting Bose gases: We develop and utilize the SU(3) truncated Wigner approximation (TWA) in
order to analyze far-from-equilibrium quantum dynamics of strongly interacting
Bose gases in an optical lattice. Specifically, we explicitly represent the
corresponding Bose... | cond-mat_quant-gas |
Quench dynamics of a weakly interacting disordered Bose gas in momentum
space: We theoretically study the out-of-equilibrium dynamics in momentum space of a
weakly interacting disordered Bose gas launched with a finite velocity. In the
absence of interactions, coherent multiple scattering gives rise to a
background o... | cond-mat_quant-gas |
Realizing a 1D topological gauge theory in an optically dressed BEC: Topological gauge theories describe the low-energy properties of certain
strongly correlated quantum systems through effective weakly interacting
models. A prime example is the Chern-Simons theory of fractional quantum Hall
states, where anyonic excit... | cond-mat_quant-gas |
Quantum criticality in disordered bosonic optical lattices: Using the exact Bose-Fermi mapping, we study universal properties of
ground-state density distributions and finite-temperature quantum critical
behavior of one-dimensional hard-core bosons in trapped incommensurate optical
lattices. Through the analysis of uni... | cond-mat_quant-gas |
Finite-temperature properties of interacting bosons on a two-leg flux
ladder: Quasi-one-dimensional lattice systems such as flux ladders with artificial
gauge fields host rich quantum-phase diagrams that have attracted great
interest. However, so far, most of the work on these systems has concentrated
on zero-tempera... | cond-mat_quant-gas |
Tunable dual-species Bose-Einstein condensates of $^{39}$K and $^{87}$Rb: We present the production of dual-species Bose-Einstein condensates of
$^{39}\mathrm{K}$ and $^{87}\mathrm{Rb}$. Preparation of both species in the
$\left| F=1,m_F=-1 \right\rangle$ state enabled us to exploit a total of three
Fesh\-bach resonanc... | cond-mat_quant-gas |
Mott Insulators of Ultracold Fermionic Alkaline Earth Atoms:
Underconstrained Magnetism and Chiral Spin Liquid: We study Mott insulators of fermionic alkaline earth atoms, described by
Heisenberg spin models with enhanced SU(N) symmetry. In dramatic contrast to
SU(2) magnetism, more than two spins are required to for... | cond-mat_quant-gas |
Quantum engineering of Majorana quasiparticles in one-dimensional
optical lattices: We propose a feasible way of engineering Majorana-type quasiparticles in
ultracold fermionic gases on a one-dimensional (1D) optical lattice. For this
purpose, imbalanced ultracold atoms interacting by the spin-orbit coupling
should b... | cond-mat_quant-gas |
Roton-Maxon Excitation Spectrum of Bose Condensates in a Shaken Optical
Lattice: We present experimental evidence showing that an interacting Bose condensate
in a shaken optical lattice develops a roton-maxon excitation spectrum, a
feature normally associated with superfluid helium. The roton-maxon feature
originates... | cond-mat_quant-gas |
Competing Superconducting States for Ultracold Atoms in Optical Lattices
with Artificial Staggered Magnetic Field: We study superconductivity in an ultracold Bose-Fermi mixture loaded into a
square optical lattice subjected to a staggered flux. While the bosons form a
superfluid at very low temperature and weak inter... | cond-mat_quant-gas |
Evolution of the unitary Bose gas for broad to narrow Feshbach
resonances: We study the post-quench dynamics of unitary Bose gases using a two-channel
model, focusing on the effect of variations in the width of the Feshbach
resonance due to density changes. We generally find that increasing the density
leads to a cor... | cond-mat_quant-gas |
Landau Effective Interaction between Quasiparticles in a Bose-Einstein
Condensate: Landau's description of the excitations in a macroscopic system in terms of
quasiparticles stands out as one of the highlights in quantum physics. It
provides an accurate description of otherwise prohibitively complex many-body
systems... | cond-mat_quant-gas |
Quantum quench in an atomic one-dimensional Ising chain: We study non-equilibrium dynamics for an ensemble of tilted one-dimensional
atomic Bose-Hubbard chains after a sudden quench to the vicinity of the
transition point of the Ising paramagnetic to anti-ferromagnetic quantum phase
transition. The quench results in co... | cond-mat_quant-gas |
Highly Polarized Fermi Gases across a Narrow Feshbach Resonance: We address the phase of a highly polarized Fermi gas across a narrow Feshbach
resonance starting from the problem of a single down spin fermion immersed in a
Fermi sea of up spins. Both polaron and pairing states are considered using the
variational wave ... | cond-mat_quant-gas |
A new Sobolev gradient method for direct minimization of the
Gross-Pitaevskii energy with rotation: In this paper we improve traditional steepest descent methods for the direct
minimization of the Gross-Pitaevskii (GP) energy with rotation at two levels.
We first define a new inner product to equip the Sobolev space ... | cond-mat_quant-gas |
Modulational instability in binary spin-orbit-coupled Bose-Einstein
condensates: We study modulation instability (MI) of flat states in two-component
spin-orbit-coupled (SOC) Bose-Einstein condensates (BECs) in the framework of
coupled Gross-Pitaevskii equations for two components of the pseudospinor wave
function. T... | cond-mat_quant-gas |
Resonant enhancement of the FFLO-state in 3D by a one-dimensional
optical potential: We describe an imbalanced superfluid Fermi gas in three dimensions within the
path-integral framework. To allow for the formation of the
Fulde-Ferell-Larkin-Ovchinnikov-state (FFLO-state), a suitable form of the
saddle-point is chose... | cond-mat_quant-gas |
Evidence for a Bose-Einstein condensate of excitons: The demonstration of Bose-Einstein condensation in atomic gases at
micro-Kelvin temperatures is a striking landmark while its evidence for
semiconductor excitons still is a long-awaited milestone. This situation was
not foreseen because excitons are light-mass boson-... | cond-mat_quant-gas |
Quantum criticality in interacting bosonic Kitaev-Hubbard models: Motivated by recent work on the non-Hermitian skin effect in the bosonic
Kitaev-Majorana model, we study the quantum criticality of interacting bosonic
Kitaev-Hubbard models on a chain and a two-leg ladder. In the hard-core limit,
we show exactly that th... | cond-mat_quant-gas |
Bose-Einstein condensation into non-equilibrium states studied by
condensate focusing: We report the formation of Bose-Einstein condensates into non-equilibrium
states. Our condensates are much longer than equilibrium condensates with the
same number of atoms, show strong phase fluctuations, and have a dynamical
evol... | cond-mat_quant-gas |
First-order superfluid-Mott-insulator transition for quantum optical
switching in cavity QED arrays with two cavity modes: We theoretically investigated the ground states of coupled arrays of cavity
quantum electrodynamical (cavity QED) systems in presence of two photon modes.
Within the Gutzwiller-type variational a... | cond-mat_quant-gas |
Direct evaporative cooling of 39K atoms to Bose-Einstein condensation: We report the realization of Bose-Einstein condensates of 39K atoms without
the aid of an additional atomic coolant. Our route to Bose-Einstein
condensation comprises Sub Doppler laser cooling of large atomic clouds with
more than 10^10 atoms and ev... | cond-mat_quant-gas |
Precise characterization of ^6Li Feshbach resonances using trap-sideband
resolved RF spectroscopy of weakly bound molecules: We have performed radio-frequency dissociation spectroscopy of weakly bound
^6Li_2 Feshbach molecules using low-density samples of about 30 molecules in an
optical dipole trap. Combined with a ... | cond-mat_quant-gas |
Observation of Pauli Crystals: The Pauli exclusion principle is a fundamental law underpinning the structure
of matter. Due to their anti-symmetric wave function, no two fermions can
occupy the same quantum state. Here, we report on the direct observation of the
Pauli principle in a continuous system of up to six parti... | cond-mat_quant-gas |
Circumnavigating an ocean of incompressible light: This is a popular science article to appear on the "Il Nuovo Saggiatore"
magazine of the Italian Physical Society. It aims at introducing a broad
audience of physicists to the most recent trends in many-body physics of
degenerate quantum gases with a special attention ... | cond-mat_quant-gas |
Pseudogap phenomenon and effects of population imbalance in the normal
state of a unitary Fermi gas: We investigate strong-coupling corrections to single-particle excitations in
the normal state of a spin-polarized unitary Fermi gas. Within the framework of
an extended T-matrix approximation, we calculate the single-... | cond-mat_quant-gas |
Time-Averaged Adiabatic Potentials: Versatile traps and waveguides for
ultracold quantum gases: We demonstrate a novel class of trapping potentials, time-averaged adiabatic
potentials (TAAP) which allows the generation of a large variety of traps and
waveguides for ultracold atoms. Multiple traps can be coupled throu... | cond-mat_quant-gas |
Cold atoms in cavity-generated dynamical optical potentials: We review state-of-the-art theory and experiment of the motion of cold and
ultracold atoms coupled to the radiation field within a high-finesse optical
resonator in the dispersive regime of the atom-field interaction with small
internal excitation. The optica... | cond-mat_quant-gas |
Towards strongly correlated photons in arrays of dissipative nonlinear
cavities under a frequency-dependent incoherent pumping: We report a theoretical study of a quantum optical model consisting of an
array of strongly nonlinear cavities incoherently pumped by an ensemble of
population-inverted two-level atoms. Proj... | cond-mat_quant-gas |
Realization of a stroboscopic optical lattice for cold atoms with
subwavelength spacing: Optical lattices are typically created via the ac-Stark shift, which are
limited by diffraction to periodicities $\ge\lambda/2$, where $\lambda$ is the
wavelength of light used to create them. Lattices with smaller periodicities
... | cond-mat_quant-gas |
Elementary excitations in dipolar spin-1 Bose-Einstein condensates: We have numerically solved the low-energy excitation spectra of ferromagnetic
Bose-Einstein condensates subject to dipolar interparticle interactions. The
system is assumed to be harmonically confined by purely optical means, thereby
maintaining the sp... | cond-mat_quant-gas |
Controlling coherence via tuning of the population imbalance in a
bipartite optical lattice: The control of transport properties is a key tool at the basis of many
technologically relevant effects in condensed matter. The clean and precisely
controlled environment of ultracold atoms in optical lattices allows one to
... | cond-mat_quant-gas |
Stabilizing Gauge Theories in Quantum Simulators: A Brief Review: Quantum simulation is at the heart of the ongoing "second" quantum
revolution, with various synthetic quantum matter platforms realizing evermore
exotic condensed matter and particle physics phenomena at high levels of
precision and control. The implemen... | cond-mat_quant-gas |
Phase diagram of dipolar bosons in 2D with tilted polarization: We analyze the ground state of a system of dipolar bosons moving in the $XY$
plane and such that their dipolar moments are all aligned in a fixed direction
in space. We focus on the general case where the polarization field forms a
generic angle $\alpha$ w... | cond-mat_quant-gas |
Detuning control of Rabi vortex oscillations in light matter coupling: We study analytically the dynamics of vortices in strongly coupled
exciton--photon fields in the presence of energy detuning. We derive equations
for the vortex core velocity and mass, where they mainly depend on Rabi
coupling and the relative dista... | cond-mat_quant-gas |
Exact three-body local correlations for excited states of the 1D Bose
gas: We derive an exact analytic expression for the three-body local correlations
in the Lieb-Liniger model of 1D Bose gas with contact repulsion. The local
three-body correlations control the thermalization and particle loss rates in
the presence ... | cond-mat_quant-gas |
Second-order topological insulator in periodically driven lattice: The higher-order topological insulator (HOTI) is a new type of topological
system which has special bulkedge correspondence compared with conventional
topological insulators. In this work, we propose a scheme to realize Floquet
HOTI in ultracold atom sy... | cond-mat_quant-gas |
Real-Time Dynamics of an Impurity in an Ideal Bose Gas in a Trap: We investigate the behavior of a harmonically trapped system consisting of an
impurity in a dilute ideal Bose gas after the boson-impurity interaction is
suddenly switched on. As theoretical framework, we use a field theory approach
in the space-time dom... | cond-mat_quant-gas |
Nontrivial Haldane phase of an atomic two-component Fermi gas trapped in
a 1d optical lattice: We propose how to create a non-trivial Haldane phase in atomic two-component
Fermi-gas loaded on one-dimensional (1-D) optical lattice with trap potential.
The Haldane phase is naturally formed on $p$-band Mott core in a wi... | cond-mat_quant-gas |
Universal relations and normal phase of an ultracold Fermi gas with
coexisting $s$- and $p$-wave interactions: We study the universal relations and normal-phase thermodynamics of a
two-component ultracold Fermi gas with coexisting $s$- and $p$-wave
interactions. Due to the orthogonality of two-body wave functions of ... | cond-mat_quant-gas |
Many-polaron description of impurities in a Bose-Einstein condensate in
the weak coupling regime: The weak coupling many-polaron formalism is applied to the case of the
polaronic system consisting of impurities in a Bose-Einstein condensate. This
allows to investigate the groundstate properties and the response of th... | cond-mat_quant-gas |
Quantum glass of interacting bosons with off-diagonal disorder: We study disordered interacting bosons described by the Bose-Hubbard model
with Gaussian-distributed random tunneling amplitudes. It is shown that the
off-diagonal disorder induces a spin-glass-like ground state, characterized by
randomly frozen quantum-me... | cond-mat_quant-gas |
Stable knots in the trapped Bose-Einstein condensates: The knot of spin texture is studied within the two-component Bose-Einstein
condensates which are described by the nonlinear Gross-Pitaevskii equations. We
start from the non-interacting equations including an axisymmetric harmonic
trap to obtain an exact solution, ... | cond-mat_quant-gas |
Illustration of universal relations for trapped four-fermion system with
arbitrary s-wave scattering length: A two-component four-fermion system with equal masses, interspecies s-wave
scattering length a and vanishing intraspecies interactions under external
spherically symmetric harmonic confinement is considered. U... | cond-mat_quant-gas |
Bose-Einstein condensates in toroidal traps: instabilities, swallow-tail
loops, and self-trapping: We study the stability and dynamics of an ultra-cold bosonic gas trapped in a
toroidal geometry and driven by rotation, in the absence of dissipation. We
first delineate, via the Bogoliubov mode expansion, the regions o... | cond-mat_quant-gas |
Spin-Energy Correlation in Degenerate Weakly-Interacting Fermi Gases: Weakly interacting Fermi gases exhibit rich collective dynamics in
spin-dependent potentials, arising from correlations between spin degrees of
freedom and conserved single atom energies, offering broad prospects for
simulating many-body quantum syst... | cond-mat_quant-gas |
The Raman dressed spin-1 spin-orbit coupled quantum gas: The recently realized spin-orbit coupled quantum gases (Y.-J Lin {\it et
al}., Nature 471, 83-86 (2011); P. Wang {\it et al}., PRL 109, 095301 (2012);
L. W. Cheuk {\it et al}., PRL 109, 095302 (2012)) mark a breakthrough in the
cold atom community. In these exper... | cond-mat_quant-gas |
Density-wave steady-state phase of dissipative ultracold fermions with
nearest-neighbor interactions: In this work we investigate the effect of local dissipation on the presence
of density-wave ordering in spinful fermions with both local and
nearest-neighbor interactions as described by the extended Hubbard model. W... | cond-mat_quant-gas |
Excitation spectrum of the Lieb-Liniger model: We study the integrable model of one-dimensional bosons with contact
repulsion. In the limit of weak interaction, we use the microscopic
hydrodynamic theory to obtain the excitation spectrum. The statistics of
quasiparticles changes with the increase of momentum. At lowest... | cond-mat_quant-gas |
Coherence and entanglement in the ground-state of a bosonic Josephson
junction:from macroscopic Schrödinger cats to separable Fock states: We consider a bosonic Josephson junction made of $N$ ultracold and dilute
atoms confined by a quasi one-dimensional double-well potential within the
two-site Bose-Hubbard model fr... | cond-mat_quant-gas |
Dark solitons in cigar-shaped Bose-Einstein condensates in double-well
potentials: We study the statics and dynamics of dark solitons in a cigar-shaped
Bose-Einstein condensate confined in a double-well potential. Using a
mean-field model with a non-cubic nonlinearity, appropriate to describe the
dimensionality cross... | cond-mat_quant-gas |
Comment on "Motion of an impurity particle in an ultracold
quasi-one-dimensional gas of hard-core bosons [Phys. Rev. A 79, 033610
(2009)]": Very recently Girardeau and Minguzzi [arXiv:0807.3366v2, Phys. Rev. A 79,
033610 (2009)] have studied an impurity in a one-dimensional gas of hard-core
bosons. In particular th... | cond-mat_quant-gas |
Bosonic Kondo-Hubbard model: We study, using quantum Monte-Carlo simulations, the bosonic Kondo-Hubbard
model in a two dimensional square lattice. We explore the phase diagram and
analyse the mobility of particles and magnetic properties. At unit filling, the
transition from a paramagnetic Mott insulator to a ferromagn... | cond-mat_quant-gas |
Optical Control of Exchange Interaction and Kondo Temperature in cold
Atom Gas: The relevance of magnetic impurity problems in cold atom systems depends
crucially on the nature of exchange interaction between itinerant fermionic
atoms and a localized impurity atom. In particular, Kondo physics occurs only
if the exch... | cond-mat_quant-gas |
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