Heavily Enhanced Dynamic Stark Shift in a System of Bose Einstein Condensation of Photons

驱动耗散Wannier-Stark晶格中的非平衡非线性效应与动力学玻色子凝聚

Nonequilibrium Nonlinear Effects and Dynamical Boson Condensation in a Driven-Dissipative Wannier-Stark Lattice

本研究针对驱动耗散Wannier-Stark晶格玻色子系统，通过数值模拟揭示了弱相互作用下玻色子凝聚于单Wannier-Stark态、强相互作用下出现类Bloch振荡等非平衡现象，并给出含混沌区域的相图，为光子及超冷气体实验提供指引。

Experimental study of tune-out wavelengths for spin-dependent optical lattice in $^{87}$Rb Bose-Einstein condensation

We study the periodic potential of one-dimensional optical lattice originated from scalar shift and vector shift by manipulating the lattice polarizations. The ac Stark shift of optical lattice is measured by Kapitza-Dirac scattering of $^{87}$Rb Bose-Einstein condensate and the characteristics of spin-dependent optical lattice are presented by scanning the lattice wavelength between the D1 and D2 lines. At the same time, tune-out wavelengths that ac Stark shift cancels can be probed by optical lattice. We give the tune-out wavelengths in more general cases of balancing the contributions of bo…

具有两个交叉光泵浦的腔-BEC系统中相变的理论探索

Theoretical Exploration of Phase Transitions in a Cavity-BEC System with Two Crossed Optical Pumps

本文研究了具有两个交叉光泵浦的腔-BEC系统，微扰地确定了正常超流相与超辐射相的相边界，发现吸引性和排斥性光学晶格在双泵浦下表现出截然不同的相变行为。

Thermodynamics, density profiles and correlation functions of the inhomogeneous one-dimensional spinor Bose gas

We investigate the finite temperature properties of the one-dimensional two-component Bose gas (2CBG) with repulsive contact interaction in a harmonic trap. Making use of a new lattice embedding for the 2CBG and the quantum transfer matrix we derive a system of two nonlinear integral equations characterizing the thermodynamics of the uniform system for all values of the relevant parameters: temperature, strength of the interaction, chemical potential and magnetic field. This system allows for an easy numerical implementation in stark contrast with the infinite number of equations obtained by e…