Trapped ultracold bosons in periodically modulated lattices

Huo, Jia-Wei1; Zhang, Fu-Chun1; Chen, Weiqiang1,2; Troyer, M.3; Schollwoeck, U.4,5

2011-10-07

10.1103/PhysRevA.84.043608

PHYSICAL REVIEW A   影响因子和分区

2469-9926

2469-9934

Motivated by the recent rapid development of the field of quantum gases in optical lattices, we present a comprehensive study of the spectrum of ultracold atoms in a one-dimensional optical lattice subjected to a periodic lattice modulation. Using the time-dependent density matrix renormalization group method, we study the dynamical response due to lattice modulations in different quantum phases of the system with varying density. For the Mott-insulating state, we identify several excitation processes, which provide important information about the density profile of the gases. For the superfluid, the dynamical response can be well described in a local density approximation. This simplification can be valuable in understanding the strong-correlated superfluid in a slow-varying harmonic potential. All these spectroscopic features of an inhomogeneous system can be used as a test for the validity of the Bose-Hubbard model in a parabolic trapping potential.

SCI ; EI

英语

其他

DFG[FOR 801]

Optics ; Physics

Optics ; Physics, Atomic, Molecular & Chemical

WOS:000295629100007

AMER PHYSICAL SOC

20114114419364

Crystal lattices ; Electron traps ; Excited states ; Hubbard model ; Local density approximation ; Modulation ; Optical lattices ; Optical materials ; Statistical mechanics

Optical Devices and Systems:741.3 ; Laser Beam Interactions:744.8 ; Mathematics:921 ; Classical Physics; Quantum Theory; Relativity:931 ; Crystal Lattice:933.1.1 ; Electronic Structure of Solids:933.3

PHYSICS

Web of Science

1.Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China
2.S Univ Sci & Technol China, Dept Phys, Shenzhen, Peoples R China
3.ETH, Inst Theoret Phys, CH-8093 Zurich, Switzerland
4.Univ Munich, Dept Phys, D-80333 Munich, Germany
5.Univ Munich, Arnold Sommerfeld Ctr Theoret Phys, D-80333 Munich, Germany

Huo, Jia-Wei,Zhang, Fu-Chun,Chen, Weiqiang,et al. Trapped ultracold bosons in periodically modulated lattices[J]. PHYSICAL REVIEW A,2011,84(4).

Huo, Jia-Wei,Zhang, Fu-Chun,Chen, Weiqiang,Troyer, M.,&Schollwoeck, U..(2011).Trapped ultracold bosons in periodically modulated lattices.PHYSICAL REVIEW A,84(4).

Huo, Jia-Wei,et al."Trapped ultracold bosons in periodically modulated lattices".PHYSICAL REVIEW A 84.4(2011).