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 circle in the complex energy plane separates Anderson-localized from extended eigenstates.
· “Mobility rings in a non-Hermitian non-Abelian quasiperiodic lattice”
A repulsive impurity binds to density holes, giving a spectroscopic marker of vortex proliferation in 2D and 3D.
New spectroscopy finds the shift shrinks too—and an ideal Bose polaron model captures it all.
· “Fate of an impurity strongly interacting with a thermal Bose gas”
Only about 4 of the 35 meV is true trion binding; the rest is bright\u2013dark exciton difference.
· “Asymmetric trions in monolayer transition metal dichalcogenides”
Ground states and real-time dynamics of 1D condensates stay low-rank while matching standard solvers.
· “Quantics Tensor Train for solving Gross-Pitaevskii equation”
Flux strings split into meson pairs and nucleate glueball-like loops at computable field strengths
· “String Breaking Dynamics and Glueball Formation in a 2+1D Lattice Gauge Theory”
No stirring involved: quench speed alone sets the vortex tangle, whose energy spectrum obeys Kolmogorov 5/3 scaling.
Zeeman shifts plus superexchange suppress the symmetry-breaking errors that doomed earlier rishon-based schemes.
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”
The parity of the ratio's denominator sets which bands break PT symmetry first and whether the lowest band stays flat.
A task-force report argues that hydrodynamics can emerge without scale separation, from few-fermion gases to hot quark-gluon plasmas.
· “Few is different: deciphering many-body dynamics in mesoscopic quantum gases”
Three in-situ knobs control the beam shift: circulation, control power, and cavity detuning.
· “Goos-Hanchen Shift with a rotating atomic superfluid in a ring”
A variational model finds half-vortex and spiral spin states, including meron–antimeron pairs with zero net charge.
In an attractive t-J model, string order and dominant triplet pairing coexist—a phase erbium and dysprosium chains could reach.
· “Topology meets superconductivity in a one-dimensional t-J model of magnetic atoms”
Real-space DMFT plus percolation maps the 2D disordered Bose-Hubbard phase diagram
Resistivity stripped into compressibility and diffusion reveals a universal 1/√T charge-diffusion law.
· “Strange diffusivity of incoherent metal in half-filled two-dimensional Hubbard model”
High-flux condensate mixtures are released with both species co-located, a step toward space gravity tests.
Imbalance measurements on 8×8 to 24×24 lattices show a growing crossover only under random disorder.
Helix states: all cumulants grow as t^0.45; domain walls: third and fourth double the first two's exponent.
· “Universal scaling of higher-order cumulants in quantum isotropic spin chains”
Dense near-threshold resonances and a one-dimensional STIRAP model make coherent transfer to the ground state look feasible.
· “Production of ultracold asymmetric tops from Sr atoms and SrOH molecules”
Changing the frequency ratio c makes scars persist or vanish, giving a knob for prethermal and time-crystal-like phases.
· “Controlling quantum scars and engineering subharmonic responses with a two frequency drive”
Tuning electron-polariton coupling via trion Feshbach resonances puts light-induced pairing in reach.
The lattice light-shift correction changes by up to 8e-17 depending on the spectral model; Sisyphus cooling shrinks the gap to 1e-18.
The lower tone is a hole-excitation signal; both shift with temperature across the hole-induced anomaly.
· “Particle-hole origin of thermal beating in dipole-compression modes of a 1D Bose gas”
Structure-factor pinch points match a rank-2 U(1) gauge theory, putting emergent 2+1D photons on a concrete lattice model.
· “Gapless fracton quantum spin liquid and emergent photons in a 2D spin-1 model”
Geometric frustration keeps their steady-state degeneracy intact even when couplings are disordered.
· “Nonreciprocal and Geometric Frustration in Dissipative Quantum Spins”
A single Raman knob steers optimal sensing direction across six SU(2) subspaces of a spin-orbit-coupled BEC.
· “Four-mode quantum sensing and Fisher information in a spin-orbit-coupled Bose gas”
A tunable asymmetry appears in the loss current and shifts the quantum Zeno effect, offering a transport signature for cold atoms.
· “Spontaneous emission as a bridge from Lindbladian to nonreciprocal reservoirs”
Simulations show superfluid drag leaves the ion moving and can push it backwards at strong coupling.
A Rydberg-atom staggered walk finds a marked vertex in √N oracle calls, using a classical tessellation precomputation to set up the graph.
· “Quantum Walks on Arbitrary Spatial Networks with Rydberg Atoms”
A strong kick produces a star for honeycomb, a hexagon for its dual — Babinet's principle breaks.
· “Distinguishing dual lattice by strong-pulse matter-wave diffraction”
IQ-mixer phase tracking shows coherence emerges on its own, not from the pump, in a quasiparticle condensate.
· “Spontaneous Emergence of Phase Coherence in a quasiparticle Bose-Einstein Condensate”
Homogeneous Hubbard gases give nearest-neighbor correlations that match quantum Monte Carlo and expose virtual tunneling.
· “Interference and short-range correlation in fermionic Hubbard gases”
A periodic Feshbach modulation across the critical point erases domain walls, making the phase transition switchable.
Inter-layer coupling splits sites into clusters, leaving particles mobile only inside pockets that never connect into a superfluid.
· “Interacting Bose gases in twisted-bilayer optical lattices”
The Lee-Huang-Yang quantum-fluctuation term is what keeps these knot-like solitons stable in trapped binary Bose gases.
Exact two-qubit dynamics decays purity quadratically, while every constant Markovian generator decays exponentially.
· “A Breakdown Case Study of the Lindblad Approach via Entanglement and Purity”
Frequencies, lifetimes, linewidths, and Rabi rates for the cooling, repump, and clock lines, with sources and uncertainties.
If the claim holds, a beginning graduate student can learn Green's functions and diagrams from one book.
· “Lecture Notes on Quantum Many-Body Theory: A Pedagogical Introduction”
A transverse field turns exponential squeezing into scalable multipartite entanglement, even for 2D dipolar XY spins.
· “Exponential onset of scalable entanglement via twist-and-turn dynamics in XY models”
Local frustration centers bind singlets while the hole stays delocalized, giving stepwise control of magnetic order.
· “Shaping Magnetic Order by Local Frustration for Itinerant Fermions on a Graph”
In isolated gases, learning that two particle types exist raises measured entropy but yields no extra extractable work
Ground states with 125 vortices and stable breathing dynamics run on exponentially fine grids at near-linear cost.
First-violation time grows linearly with observer distance, tracking the Lieb-Robinson light cone.
One tunable knob selects between droplets, vortex rings, and droplet lattices in a 2D condensate.
A matrix-product Fourier transform cuts cost from linear-in-grid to logarithmic, with vortex runs up to a 128³ grid.
· “Tensor network methods for the Gross-Pitaevskii equation on fine grids”
Chern number -1 and staggered spin order appear together below the hopping energy; a cold-atom setup is proposed.
· “Topology-ferrimagnetism intertwining via weak interactions in Lieb lattices”
Simulations find a supersolid window near 4 degrees ellipticity and 60-120 Hz trap frequency, within reach of today's NaCs experiments.
· “Supersolid Phases in Ultracold Gases of Microwave Shielded Polar Molecules”
Numerically exact spectra and pair correlations show quasi-2D confinement, not stronger attraction, promotes pairing.
· “Energetic and Structural Properties of Two-Dimensional Trapped Mesoscopic Fermi Gases”
The periodic drive's synthetic dimension turns edge-channel counting into a bulk theta term for magnetization.
· “Quantized Chern-Simons Axion Coupling in Anomalous Floquet Systems”
Generalized Maxwell relations let quantum simulators read off pressure, entropy, heat capacity from G2.
· “Quantum simulation of thermodynamics: Maxwell relations for pair correlations”
Fringes no longer shift with lattice-depth drifts at the magic depth, stabilizing compact force sensors.
· “Continuously trapped matter-wave interferometry in magic Floquet-Bloch band structures”
Weak nonlinearity gives integer transport; strong nonlinearity gives fractional steps like -1/2 and -1/3.
· “Topological Invariants in Nonlinear Thouless Pumping of Solitons”
Predicts a density-imbalanced Mott insulator and continuous superfluid-insulator transitions testable in cold-atom experiments.
· “Bose-Hubbard Model on a Honeycomb Superlattice: Quantum Phase Transitions and Lattice Effects”
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.
