Probing relaxation dynamics of a few strongly correlated bosons in a 1D triple well optical lattice

被引：14

作者：

Bera, S. ^{[1
]}

Roy, R. ^{[1
]}

Gammal, A. ^{[2
]}

Chakrabarti, B. ^{[1
,2
,3
]}

Chatterjee, B. ^{[4
]}

机构：

[1] Presidency Univ, Dept Phys, 86-1 Coll St, Kolkata 700073, India

[2] Univ Sao Paulo, Inst Fis, BR-05508090 Sao Paulo, Brazil

[3] Abdus Salam Int Ctr Theoret Phys, I-34100 Trieste, Italy

[4] Indian Inst Technol Kanpur, Dept Phys, Kanpur 208016, Uttar Pradesh, India

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2019年 / 52卷 / 21期

基金：

巴西圣保罗研究基金会;

关键词：

interaction quench; lattice depth quench; information entropy; QUANTUM; SUPERFLUID; INSULATOR; GAS;

D O I：

10.1088/1361-6455/ab2999

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The relaxation process of a few strongly interacting bosons in a triple well optical lattice is studied from the first principle using the multiconfigurational time-dependent Hartree method for bosons. We report the contrasting response of the system under two independent quench processes: an interaction quench and a lattice depth quench. We analyze the evolution of the reduced one-body density matrix, two-body density and the Shannon information entropy for a wide range of lattice depth and interaction strength parameters. For the strong interaction quench, we observe a very fast relaxation to the steady state. In contrast, for the lattice depth quench, we observe collapse-revival dynamics in all the key measures. We also provide the best fitting formulas for relaxation and revival time which follow power law decay.

引用

页数：10

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