Quantum Gases
Ultracold atomic and molecular gases, Bose-Einstein condensation, Feshbach resonances, spinor condensates, optical lattices, quantum simulation with cold atoms and molecules, macroscopic interference phenomena
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In 2D condensates, flow can outrun sound at a horizon, with a computable Hawking temperature for uniform-density setups.
· “Acoustic black holes, white holes, and wormholes in Bose-Einstein condensates in two dimensions”
A repulsive impurity binds to density holes, giving a spectroscopic marker of vortex proliferation in 2D and 3D.
As the gas cools through its superfluid transition, sound damping sticks near ħ/m instead of diverging.
· “Universal Sound Diffusion in a Strongly Interacting Fermi Gas”
Complete mode expansion shows Hawking-partner correlations deviate from a thermal spectrum at finite wavelengths.
· “Departing from thermality of analogue Hawking radiation in a Bose-Einstein condensate”
Doublon and singlon counts stay fixed while the charge-density-wave imbalance relaxes slowly.
The threshold first rises with particle number, then falls; ferromagnetic coupling lowers it throughout.
SU(2)-symmetric Heisenberg model supports a generalized eigenstate thermalization hypothesis for noncommuting charges.
· “Numerical evidence for the non-Abelian eigenstate thermalization hypothesis”
Switching ℓ from 1 to 3 or 6 turns the trap square-well-like and alters soliton collisions and phase shifts.
· “Optically tuned soliton dynamics in Bose-Einstein condensates within dark traps”
Linear band crossings with real energy and integer charge appear in a stacked non-Hermitian chain, then vanish when boundaries close.
· “Non-Bloch Dirac Points and Phase Diagram in the Stacked Non-Hermitian SSH Model”
In a honeycomb lattice, a harmonic trap turns the Dirac point into a vortex source, with a measured superfluid/Mott phase diagram.
Curved hydrodynamic paths carry long-range correlations that rewrite higher-order fluctuation statistics.
· “Full counting statistics after quantum quenches as hydrodynamic fluctuations”
A rigidly rotating gas condenses at a lower critical temperature and with a new critical exponent.
· “Bose-Einstein condensation in a rigidly rotating relativistic boson gas”
A driven spin-boson system freezes into a pure localized state at a loss-tuned critical coupling.
· “Markovian dissipation can stabilize a (localization) quantum phase transition”
A 2π×80 kHz intermediate state makes one-way STIRAP transfer 71% efficient at 1 µK.
· “Spectroscopy and Ground-State Transfer of Ultracold Bosonic ³⁹K¹³³Cs Molecules”
IBM hardware tracks electron-positron and meson collisions past impact, showing confinement and scar-like inelastic dynamics.
· “Observation of hadron scattering in a lattice gauge theory on a quantum computer”
A dual-axis acousto-optic deflector paints blue-detuned optical potentials over a 2.8 mm field, with a measured edge sharpness p=152 and…
· “Large, ultra-flat optical traps for uniform quantum gases”
A Wilson-loop condition classifies the grids and predicts spin transport in any direction without fine-tuned spin-orbit matching.
· “Persistent spin grids with spin-orbit coupled 2D electron gas”
At large total angular momentum, the pair's wave function is squeezed transverse to its motion, changing its geometry and binding energy.
In cold-atom snapshots, the subsystem Loschmidt echo measures entropy and Hilbert-space fragmentation directly.
· “Probing quantum many-body dynamics using subsystem Loschmidt echos”
Polarization-rotation variance rises linearly with atom number after a two-color probe cancels probe-induced light shifts.
· “Dispersive measurement of spin shot noise in a Bose--Einstein condensate”
Pre-aligned modules pin into a common frame, so reconfiguring an ultracold-atom experiment becomes a mechanical swap.
Depth swings of ~200 nm shift the Rydberg transition by ~10 mV: a slow noise source for electron-on-helium qubits.
· “Effect of helium surface fluctuations on the Rydberg transition of trapped electrons”
Coherent pair rotations, 3-second Ramsey fringes, and parallel field sensing all follow from one quadratic energy shift.
· “Coherent control over the high-dimensional space of the nuclear spin of alkaline-earth atoms”
Near-perfect, 0.1 ms transfer at a 'sweet spot' between three trapped strontium atoms.
· “Transferring vibrational states of trapped atoms via a Rydberg electron”
New scattering theory shows pairing indirect excitons with cavity photons yields interactions an order of magnitude stronger.
· “Light-enhanced dipolar interactions between exciton polaritons”
Two independent PIMC routes agree with the leading free-energy fit, cross-checking equations of state.
Adding two-photon loss turns a runaway instability into coexisting normal and superradiant steady states.
· “Dissipative Phase Transition in the Two-Photon Dicke Model”
Its interface with the thermal state drifts and broadens like a membrane, on timescales the spectral gap alone cannot predict.
· “Exceptional stationary state in a dephasing many-body open quantum system”
Four polariton neurons classify shapes at 96% and beat linear classifiers without cryogenic cooling.
· “Room temperature exciton-polariton neural network with perovskite crystal”
A 4 K cryopump and <50 K walls give vacuum-limited trapping plus coherent Rydberg control in one high-optical-access platform.
· “A high optical access cryogenic system for Rydberg atom arrays with a 3000-second trap lifetime”
A hydrodynamic formula ties field strength to a blue shift of 2D plasmon resonances.
Weakly bound pairs dissolve into a broad continuum as impurity-boson coupling grows; tight dimers survive.
A Chern-Simons term, squeezed onto a line, still transmutes particle statistics through a Jordan-Wigner string.
Ramsey fringes on a 30-atom dysprosium chain show a frequency shift that evolves in time toward the low-excitation collective Lamb shift.
· “Single-atom resolved collective spectroscopy of a one-dimensional atomic array”
Large-scale QMC finds a new universality class for 1<α≤3, with BKT recovered only above α=3.
· “Bose-Hubbard model with power-law hopping in one dimension”
SO(2,1) symmetry protects the mode even at 52% cloud-size excitation; its residual damping matches technical noise.
· “Persistent breather and dynamical symmetry in a unitary Fermi gas”
The softening double mode is the fingerprint of the gas turning into a striped supersolid.
The 1034-nm dressing beam replaces the usual two-stage MOT sequence for alkaline-earth atoms.
Site-resolved images show a confined flux string decaying into a particle-antiparticle pair at the predicted tension.
· “String breaking mechanism in a lattice Schwinger model simulator”
A duality mapping BEC vortices to electric charges, valid for time-dependent density, rotation, and dissipation.
· “Electrodynamics of Vortices in Quasi-2D Scalar Bose-Einstein Condensates”
Ramping the scattering length lets one watch the gas relax onto a universal attractor before Navier-Stokes takes over.
One echo of a scrambling Hamiltonian gives a sensor at η≈2/N, within a factor of two of the Heisenberg limit.
· “A Universal Protocol for Quantum-Enhanced Sensing via Information Scrambling”
A stroboscopic dressing scheme makes effective interactions that no sum of pairwise terms can match.
· “Resonant stroboscopic Rydberg dressing: electron-motion coupling and multi-body interactions”
New distribution adds one fixed particle per state, leaving a cutoff-dependent T=0 pressure.
A small magnetic field suppresses tomographic electron transport at a field scale set by the odd-parity mean free path, much below the…
· “Magnetic field suppression of tomographic electron transport”
Site-resolved tunneling spectroscopy with separate particle and hole probes is demonstrated in a four-transmon Bose-Hubbard lattice…
· “Tunneling Spectroscopy in Superconducting Circuit Lattices”
In a three-band Chern insulator with a trivial middle band, Fisher zeros vanish; in disordered Kitaev chains, cusps persist.
Beam splitters cannot create it; it becomes usable mode entanglement for parties without a shared phase reference.
· “Entanglement between identical particles is a useful and consistent resource”
Across three models, the time-averaged echo or its second derivative turns nonanalytic exactly at the critical point.
· “Signature of nonequilibrium quantum phase transition in the long time average of Loschmidt echo”
Monte Carlo winding statistics give Tc benchmarks and nu=0.67183(18) for direct comparison with bootstrap and helium experiments.
A condensate in a ring resonator develops stable crystalline order without losing global phase coherence.
· “Supersolid properties of a Bose-Einstein condensate in a ring resonator”
A frequency-independent vertex lets cluster perturbation theory capture spin responses, matching known Hubbard limits.
· “Two-particle Correlation Functions in Cluster Perturbation Theory: Hubbard Spin Susceptibilities”
A phase-difference-driven supercurrent confirms superfluidity in a strongly interacting two-dimensional gas.
· “An ideal Josephson junction in an ultracold two-dimensional Fermi gas”
A cesium cloud expanding across the zero crossing forms, collapses, and rebuilds soliton-like peaks.
· “Collisionally inhomogeneous Bose-Einstein condensates with a linear interaction gradient”
In superfluid helium, its 393 kHz twisting mode responds the moment its 76 kHz bending mode turns turbulent.
Exchange phase is set by the angular momentum sector; momentum distribution and Tan contact match anyonic predictions exactly.
· “Exact statistical transmutation of quantum mixtures on a ring”
Attaching two vortices per boson matches spectra, Chern numbers, and quasihole braiding phases below half filling.
Stripe, plane-wave, and single-minimum phases follow from one dispersion; the stripe phase is supersolid
· “Two-component ultracold Bose gases with spin-orbit coupling”
Below the threshold both lattice halves tunnel identically; above it, the Rydberg blockade splits their LZ paths.
· “Dynamical Crossover in Landau-Zener Tunneling in Dissipative Rydberg Lattices”
Generalized dissipative Kitaev chains with next-nearest-neighbor jump terms realize steady states with topological winding number 4, while…
· “Topological states of generalized dissipative Majorana wires”
Short matter-wave revival and lattice recapture give microscopes local access to off-diagonal correlations.
Ripples appear only when a topological quench destroys boundary modes, so density movies can probe Majorana physics.
· “Ripple Signatures of Majorana Hybridization across a Topological Quantum Quench”
No fitting parameters: the most probable photon counts in a disordered cavity array follow a number-theory distribution.
· “Universal entropic occupation statistics in disordered bosonic resonators”
A gate voltage flips which layer carries the edge current, giving three switchable superconducting phases.
Tensor-network maps put the experimental regime in localized phases and chart a route to a supersolid.
Exact solution of the XX chain: every large-scale correlator is fixed by the interface transmission coefficient
· “Out-of-equilibrium inhomogeneous XX chains: Exact results and the hydrodynamic limit”
Weakly coupled third color turns a strongly paired two-color subsystem into coexisting crystalline and superfluid order.
· “Fermionic Lattice Supersolidity in the Attractive Three-Color Fermi-Hubbard Model”
A single fitted T/N reproduces the fluctuation pattern, exposing number–phase back-action hidden from static order
· “Fluctuation-based evidence for number--phase dynamics in a frustrated orbital superfluid”
A review shows how Raman coupling and density switch a BEC between stripe, plane-wave, and single-minimum states.
· “Bose-Einstein condensates with Raman-induced spin-orbit coupling : An overview”
Rotation replaces the Landau threshold with harmonic resonances and adds a workless Magnus deflection.
· “Quantum tribology: acceleration-induced Stokes friction and Magnus force in correlated Bose fluids”
By controlling the central domain's polarization, spin currents can accelerate, suppress, or reverse wall motion.
· “Coherent Control of Domain-Wall Transport in an Ultracold Bose Gas”
For light atoms and deep lattices, phase jitter can outheat intensity noise, and a measured noise spectrum predicts the rate.
By tuning cavity-exciton detuning, coherence decays switch from KPZ stretched exponentials to EW power laws.
· “Crossing over universal scaling laws in two-dimensional driven dissipative condensates”
In Rydberg-atom arrays, frequency and damping collapse across four lattice geometries under one rescaling.
· “Observation of far-from-equilibrium scaling in the transient dynamics of 2D quantum magnets”
Two qubits in one atom couple via a tunable field—no extra ancilla atoms needed.
Four lattice singularities fix gap and chemical potential algebraically, no full spectral fitting needed.
· “Extracting the pairing gap from van Hove singularities in rf spectra of the Fermi Hubbard model”
Tracking lattice motion shows three sound branches, one of which hides large strain behind a near-zero density signal.
· “Acoustic fluctuations of two-dimensional dipolar supersolids”
It means the experimental 'self-bound' insulator is a finite-temperature effect, not a ground-state phase.
Beyond that match point, stronger loss reflects the wavepacket via the quantum Zeno effect.
New criteria tell when the phase-space noise is valid, when mean field fails, and when simulations are exact.
