cond-mat.quant-gas

Probing short-range gravity using quantum reflection

This paper proposes using quantum reflection interferometry with ultra-cold atoms to probe anomalous short-range forces predicted by beyond-standard-model theories, demonstrating through analytical and numerical models that the technique can achieve sensitivities comparable to macroscopic experiments while accounting for density-dependent noise.

Construction of asymptotic quantum many-body scar states in the SU($N$) Hubbard model

This paper constructs asymptotic quantum many-body scar states in one-dimensional SU($N$) Hubbard chains ($N\geq 3$) by embedding them into an auxiliary subspace governed by an SU($N$) ferromagnetic Heisenberg parent Hamiltonian, thereby demonstrating that gapless magnons in this model yield explicit scars with vanishing energy variance and subvolume entanglement entropy in the thermodynamic limit.

Thermal Phase Structure of the Attractive Fermi Hubbard Model with Imaginary Chemical Potential

This paper investigates the BCS-BEC crossover in the large-$N$ attractive Fermi-Hubbard model on a one-dimensional lattice using mean-field theory with an imaginary chemical potential, revealing that the crossover is governed by three key parameters and identifying a specific thermal window at unitarity where the superconducting gap vanishes while the fermion number exhibits extrema, signaling a transition between particle-like and hole-like dominant regimes.

Stabilization of bulk quantum orders in finite Rydberg atom arrays

Vortex structures in electron-positron pair production by two-colored fields

This paper investigates spin-resolved vortex structures in electron-positron pair production driven by time-delayed two-colored fields, revealing a dynamic transition from interference patterns to quantized vortex lattices governed by spin-orbit selection rules and total angular momentum conservation.

Fast projections of two-dimensional light patterns using acousto-optical deflectors

This paper presents a fast, feedback-free method for projecting two-dimensional light patterns using acousto-optical deflectors with an incommensurately staggered frequency lattice to intrinsically suppress intermodulation artifacts, enabling high-speed, high-fidelity generation of both separable and non-separable structured light fields.

Exact solutions and Dynamical phase transitions in the Lipkin-Meshkov-Glick model with Dual nonlinear interactions

By constructing an auxiliary function to map the dynamics to the complex plane of Jacobi elliptic functions, this paper derives exact classical solutions for the dual-interaction Lipkin-Meshkov-Glick model, revealing a novel non-logarithmic dynamical criticality and establishing a benchmark for analyzing quantum phase transitions in finite-size systems.

Observation of average topological phase in disordered Rydberg atom array

This study reports the first experimental observation of disorder-induced average symmetry-protected topological (SPT) phases in a disordered Rydberg atom array, confirming the existence of topologically protected edge modes and ground state degeneracy through spatially resolved correlation functions and quench dynamics.

Algebraic States in Continuum in $d\gt 1$ Dimensional Non-Hermitian Systems

This paper reports the theoretical discovery of algebraically localized eigenstates embedded within the continuum (AICs) in two-dimensional non-Hermitian systems with a single impurity, a phenomenon forbidden in both Hermitian and one-dimensional non-Hermitian systems, and proposes a local density of states as a method for their experimental detection.

Emergent topological properties in spatially modulated sub-wavelength barrier lattices

This paper demonstrates that spatially modulated sub-wavelength barrier lattices exhibit Hofstadter's butterfly-like energy spectra and controllable topological transport regimes with non-trivial Chern numbers, which can be experimentally realized using optically controlled three-level atoms.