Browsing by Author "Pu, Han"
Now showing items 120 of 21

Angular spinorbit coupling in cold atoms
DeMarco, Michael; Pu, Han (2015)We propose coupling two internal atomic states using a pair of Raman beams operated in LaguerreGaussian laser modes with unequal phase windings. This generates a coupling between the atom's pseudospin and its orbital ... 
Artificial topological models based on a onedimensional spindependent optical lattice
Zheng, Zhen; Pu, Han; Zou, Xubo; Guo, Guangcan (2017)Topological matter is a popular topic in both condensed matter and coldatom research. In the past decades, a variety of models have been identified with fascinating topological features. Some, but not all, of the models ... 
BoseFermi mapping and a multibranch spinchain model for strongly interacting quantum gases in one dimension: Dynamics and collective excitations
Yang, Li; Pu, Han (2016)We show that the wave function in one spatial sector x1<x2<⋯<xN (with xi being the coordinate of the ith particle) of a onedimensional spinor gas with contact swave interaction, either bosonic or fermionic, can be mapped ... 
Cavityassisted dynamical spinorbit coupling in cold atoms
Dong, Lin; Zhou, Lu; Wu, Biao; Ramachandhran, B.; Pu, Han (2014)We consider ultracold atoms subjected to a cavityassisted twophoton Raman transition. The Raman coupling gives rise to effective spinorbit interaction which couples the atom's centerofmass motion to its pseudospin ... 
Dynamically Manipulating Topological Physics and Edge Modes in a Single Degenerate Optical Cavity
Zhou, XiangFa; Luo, XiWang; Wang, Su; Guo, GuangCan; Zhou, Xingxiang; Pu, Han; Zhou, ZhengWei (2017)We propose a scheme to simulate topological physics within a single degenerate cavity, whose modes are mapped to lattice sites. A crucial ingredient of the scheme is to construct a sharp boundary so that the open boundary ... 
Effective pwave interaction and topological superfluids in swave quantum gases
Wang, Bin; Zheng, Zhen; Pu, Han; Zou, Xubo; Guo, Guangcan (2016)pwave interaction in cold atoms may give rise to exotic topological superfluids. However, the realization of pwave interaction in a cold atom system is experimentally challenging. Here we propose a simple scheme to ... 
Effects of spinorbit coupling on JaynesCummings and TavisCummings models
Zhu, Chuanzhou; Dong, Lin; Pu, Han (2016)We consider ultracold atoms inside a ring optical cavity that supports a single planewave mode. The cavity field, together with an external coherent laser field, drives a twophoton Raman transition between two internal ... 
Efficient generation of manybody singlet states of spin1 bosons in optical superlattices
Sun, Huanying; Xu, Peng; Pu, Han; Zhang, Wenxian (2017)We propose an efficient stepwise adiabatic merging (SAM) method to generate manybody singlet states in antiferromagnetic spin1 bosons in concatenated optical superlattices with isolated doublewell arrays, by adiabatically ... 
Emergence of topological and strongly correlated ground states in trapped Rashba spinorbitcoupled Bose gases
Ramachandhran, B.; Hu, Hui; Pu, Han (2013)We theoretically study an interacting fewbody system of Rashba spinorbitcoupled twocomponent Bose gases confined in a harmonic trapping potential. We solve the interacting Hamiltonian at large Rashba coupling strengths ... 
Gapless topological FuldeFerrell superfluidity induced by an inplane Zeeman field
Hu, Hui; Dong, Lin; Cao, Ye; Pu, Han; Liu, XiaJi (2014)Topological superfluids are recently discovered quantum matter that hosts topologically protected gapless edge states known as Majorana fermions—exotic quantum particles that act as their own antiparticles and obey nonAbelian ... 
Itinerant chiral ferromagnetism in a trapped Rashba spinorbitcoupled Fermi gas
Zhang, ShangShun; Liu, WuMing; Pu, Han (2016)We consider a repulsive twocomponent Fermi gas confined in a twodimensional isotropic harmonic potential and subject to a large Rashba spinorbit coupling. The singleparticle dispersion can be tailored by the ... 
Numberconserving interacting fermion models with exact topological superconducting ground states
Wang, Zhiyuan; Xu, Youjiang; Pu, Han; Hazzard, Kaden R.A. (2017)We present a method to construct numberconserving Hamiltonians whose ground states exactly reproduce an arbitrarily chosen BCStype meanfield state. Such parent Hamiltonians can be constructed not only for the usual ... 
Onebody density matrix and momentum distribution of strongly interacting onedimensional spinor quantum gases
Yang, Li; Pu, Han (2017)The onebody density matrix (OBDM) and the momentum distribution of quantum manybody systems are usually very difficult to calculate. Here we develop a technique to calculate the OBDM and the momentum distribution of a ... 
Spinorbit angular momentum coupling in a spin1 BoseEinstein condensate
Chen, Li; Pu, Han; Zhang, Yunbo (2016)We propose a simple model with spin and orbit angular momentum coupling in a spin1 BoseEinstein condensate, where three internal atomic states are Raman coupled by a pair of copropagating LaguerreGaussian beams. The ... 
Spinorbitcoupled topological FuldeFerrell states of fermions in a harmonic trap
Jiang, Lei; Tiesinga, Eite; Liu, XiaJi; Hu, Hui; Pu, Han (2014)Motivated by recent experimental breakthroughs in generating spinorbit coupling in ultracold Fermi gases using Raman laser beams, we present a systematic study of spinorbitcoupled Fermi gases confined in a quasionedimensional ... 
Stable Solitons in Three Dimensional Free Space without the Ground State: SelfTrapped BoseEinstein Condensates with SpinOrbit Coupling
Zhang, YongChang; Zhou, ZhengWei; Malomed, Boris A.; Pu, Han (2015)By means of variational methods and systematic numerical analysis, we demonstrate the existence of metastable solitons in three dimensional (3D) free space, in the context of binary atomic condensates combining contact ... 
Strongly interacting quantum gases in onedimensional traps
Yang, Li; Guan, Liming; Pu, Han (2015)Under secondorder degenerate perturbation theory, we show that the physics of N particles with arbitrary spin confined in a onedimensional trap in the strongly interacting regime can be described by superexchange ... 
Thermodynamic properties of Rashba spinorbitcoupled Fermi gas
Zheng, Zhen; Pu, Han; Zou, Xubo; Guo, Guangcan (2014)We investigate the thermodynamic properties of a superfluid Fermi gas subject to Rashba spinorbit coupling and effective Zeeman field. We adopt a Tmatrix scheme that takes beyondmeanfield effects, which are important ... 
Twocomponent BoseHubbard model in an array of cavity polaritons
Zhang, YongChang; Zhou, XiangFa; Zhou, Xingxiang; Guo, GuangCan; Pu, Han; Zhou, ZhengWei (2015)We propose a scheme which can realize an extended twocomponent BoseHubbard model using polaritons confined in an array of optical cavities. In addition to the densitydependent interactions, this model also contains ... 
Twocomponent polariton condensate in an optical microcavity
Zhang, YongChang; Zhou, XiangFa; Guo, GuangCan; Zhou, Xingxiang; Pu, Han; Zhou, ZhengWei (2014)We present a scheme for engineering the extended twocomponent BoseHubbard model using polariton condensate supported by an optical microcavity. Compared to the usual twocomponent BoseHubbard model with only Kerr ...