440 citations · 7k across the 189 of their papers we have counts for
135 papers · 1 filter
Properties of Bose-Einstein condensates with altermagnetism
Jia Wang, Zhao Liu, Xia-Ji Liu +1
We investigate a weakly interacting two-component Bose--Einstein condensate in the miscible regime in the presence of \emph{altermagnetism}, i.e., a collinear and globally compensa…
Hyperspherical Analysis of Dimer-Dimer Scattering in One-Dimensional Systems
Jia Wang, Hui Hu, Xia-Ji Liu
We present a comprehensive analysis of four-body scattering in one-dimensional (1D) quantum systems using the adiabatic hyperspherical representation (AHR). Focusing on dimer-dimer…
Exact calculation of spectral properties of a particle interacting with a one-dimensional Fermi gas in optical lattices
Xia-Ji Liu, Hui Hu
By using the exact Bethe wavefunctions of the one-dimensional Hubbard model with spin-up fermions and one spin-down impurity, we derive an analytic expression of the impurity f…
Exact spectral properties of Fermi polarons in one-dimensional lattices: Anomalous Fermi singularities and polaron quasiparticles
Hui Hu, Jia Wang, Xia-Ji Liu
We calculate the exact spectral function of a single impurity repulsively interacting with a bath of fermions in one-dimensional lattices, by deriving the explicit expression of th…
Breakdown of the single-mode description of ultradilute quantum droplets in binary Bose mixtures: A perspective from a microscopic bosonic pairing theory
Hui Hu, Jia Wang, Han Pu +1
In his seminal proposal of quantum droplets in binary Bose mixtures {[}Phys. Rev. Lett. \textbf{115}, 155302 (2015){]}, Dmitry Petrov suggested that the density ratio …
Theory of the spectral function of Fermi polarons at finite temperature
Hui Hu, Jia Wang, Xia-Ji Liu
We develop a general theory of Fermi polarons at nonzero temperature, including particle-hole excitations of the Fermi sea shake-up to arbitrarily high orders. The exact set of equ…
Exact theory of the finite-temperature spectral function of Fermi polarons with multiple particle-hole excitations: Diagrammatic theory versus Chevy ansatz
Hui Hu, Jia Wang, Xia-Ji Liu
By using both diagrammatic theory and Chevy ansatz approach, we derive an exact set of equations, which determines the spectral function of Fermi polarons with multiple particle-ho…
Super Fermi polaron and Nagaoka ferromagnetism in a two-dimesnional square lattice
Hui Hu, Jia Wang, Xia-Ji Liu
We consider the Fermi polaron problem of an impurity hopping around a two-dimensional square lattice and interacting with a sea of fermions at given filling factor. When the intera…
Spectral function of Fermi polarons at finite temperature from a self-consistent many-body -matrix approach in real frequency
Hui Hu, Xia-Ji Liu
We theoretically examine the finite-temperature spectral function of Fermi polarons in three dimensions, by using a self-consistent many-body -matrix theory in real frequency. I…
Thermally stable p-wave repulsive Fermi polaron without a two-body bound state
Hui Hu, Jia Wang, Xia-Ji Liu
We theoretically investigate the polaron physics of an impurity immersed in a two-dimensional Fermi sea, interacting via a p-wave interaction at finite temperature. In the unitary…
Raman spectroscopy of Fermi polarons
Hui Hu, Xia-Ji Liu
By using a non-self-consistent many-body -matrix theory, we calculate the finite-temperature Raman spectroscopy of a mobile impurity immersed in a Fermi bath in three dimensions…
BCS-BEC crossover in a quasi-two-dimensional Fermi superfluid
Jing Zhou, Tingting Shi, Xia-Ji Liu +2
We study the crossover from the Bardeen-Cooper-Shrieffer (BCS) regime to the Bose-Einstein-condensation (BEC) regime in a quasi-two-dimensional quantum gas of ultracold fermionic a…
Two-dimensional coherent spectroscopy of trion-polaritons and exciton-polaritons in atomically thin transition metal dichalcogenides
Hui Hu, Jia Wang, Riley Lalor +1
We present a microscopic many-body calculation of the nonlinear two-dimensional coherent spectroscopy (2DCS) of trion-polaritons and exciton-polaritons in charge-tunable transition…
Two-dimensional spectroscopic diagnosis of quantum coherence in Fermi polarons
Jia Wang, Hui Hu, Xia-Ji Liu
We present a full microscopic many-body calculation of a recently-proposed nonlinear two-dimensional spectroscopy for Fermi polarons, and show that the quantum coherence between th…
Second sound with ultracold atoms: A brief historical account
Hui Hu, Xing-Can Yao, Xia-Ji Liu
We briefly review the research on second sound in ultracold atomic physics, with emphasis on strongly interacting unitary Fermi gases with infinitely large -wave scattering leng…
Fermi spin polaron and dissipative Fermi-polaron Rabi dynamics
Hui Hu, Xia-Ji Liu
We consider a spin impurity with multiple energy levels moving in a non-interacting Fermi sea, and theoretically solve this Fermi spin polaron problem at nonzero temperature by usi…
Superfluidity of a Raman spin-orbit-coupled Bose gas at finite temperature
Xiao-Long Chen, Xia-Ji Liu, Hui Hu
We investigate the superfluidity of a three-dimensional weakly interacting Bose gas with a one-dimensional Raman-type spin-orbit coupling at both zero and finite temperatures. Usin…
Heavy polarons in ultracold atomic Fermi superfluids at the BEC-BCS crossover: formalism and applications
Jia Wang, Xia-Ji Liu, Hui Hu
We investigate the system of a heavy impurity embedded in a paired two-component Fermi gas at the crossover from a Bose-Einstein condensate (BEC) to a Bardeen--Cooper--Schrieffer (…
Pseudopotentials for Two-dimentional Ultracold Scattering in the Presence of Synthetic Spin-orbit-coupling
Christiaan R. Hougaard, Brendan C. Mulkerin, Xia-Ji Liu +2
We derive a pseudopotential in two dimensions (2D) with the presence of a 2D Rashba spin-orbit-coupling (SOC), following the same spirit of frame transformation in {[}Phys. Rev. A…
Exact quasiparticle properties of a heavy polaron in BCS Fermi superfluids
Jia Wang, Xia-Ji Liu, Hui Hu
We present the Ramsey response and radio-frequency spectroscopy of a heavy impurity immersed in an interacting Fermi superfluid, using exact functional determinant approach. We des…
Photo-excitation measurement of Tan's contact for a strongly interacting Fermi gas
Jia Wang, Xia-Ji Liu, Hui Hu
We derive theoretically an exact relation between Tan's universal contact and the photo-excitation rate of a strongly interacting Fermi gas, in the case of optically transferring f…
Fermi polarons at finite temperature: Spectral function and rf-spectroscopy
Hui Hu, Xia-Ji Liu
We present a systematic study of a mobile impurity immersed in a three-dimensional Fermi sea of fermions at finite temperature, by using the standard non-self-consistent many-body…
Beyond Gaussian pair fluctuation theory for strongly interacting Fermi gases II: The broken-symmetry phase
Brendan C. Mulkerin, Xing-Can Yao, Yoji Ohashi +2
We theoretically study the thermodynamic properties of a strongly interacting Fermi gas at the crossover from a Bardeen-Cooper-Schrieffer (BCS) superfluid to a Bose-Einstein conden…
Crossover polarons in a strongly interacting Fermi superfluid
Hui Hu, Jia Wang, Jing Zhou +1
We investigate the zero-temperature quasiparticle properties of a mobile impurity immersed in a strongly interacting Fermi superfluid at the crossover from a Bose-Einstein condensa…