6 papers
Tuning Density and Spin Ordering of Degenerate Fermi Gases in an Optical Cavity
Wei Qin, Yuan-Hong Chen, Renyuan Liao
We investigate a spin-degenerate Fermi gas coupled to a high-finesse optical cavity, where the competition between scalar and vectorial couplings is controlled by the relative pola…
Phase transition, phase separation and mode softening of a two-component Bose-Einstein condensate in an optical cavity
Jia-Ying Lin, Wei Qin, Renyuan Liao
We investigate the superradiant phase transition in a two-component Bose-Einstein condensate with distinct atomic detunings, confined in an optical cavity and driven by a transvers…
Unified Field-integral Thermodynamics of Bose Mixtures: Stability and Critical Behavior
Yuan-Hong Chen, Renyuan Liao
We establish a unified thermodynamic framework for Bose mixtures at finite temperatures based on the functional field integral, within which the decision on whether to discard the…
Asymptotic Freedom of Two Heavy Impurities in a Bose-Einstein Condensate
Dong-Chen Zheng, Lin Wen, Renyuan Liao
We consider two heavy impurities immersed in a Bose-Einstein condensate, and calculate the self-energy using the Wilsonian renormalization. The polaron energy, quasiparticle residu…
Mediated Interactions and Damping Effects in Superfluid Mixtures of Bose and Fermi Gases
Dong-Chen Zheng, Yu-Xin Liao, Wen Lin +1
We investigate the homogeneous superfluid mixtures of Bardeen-Cooper-Schrieffer~(BCS) superfluid originating from pairing two-species fermionic atoms and superfluidity stemming fro…
Theoretical Exploration of Phase Transitions in a Cavity-BEC System with Two Crossed Optical Pumps
Wei Qin, Dong-Chen Zheng, Zhao-Di Wu +2
We consider a Bose-Einstein condensation (BEC) inside an optical cavity and two crossed coherent pump fields. We determine the phase boundary separating the normal superfluid phase…