Two-band Bose-Hubbard model for many-body resonant tunneling in the Wannier-Stark system

被引：28
|
作者：
Parra-Murillo, Carlos A. [1 ,2 ]
Madronero, Javier [3 ]
Wimberger, Sandro [1 ,2 ]
机构：
[1] Heidelberg Univ, Inst Theoret Phys, D-69120 Heidelberg, Germany
[2] Heidelberg Univ, Ctr Quantum Dynam, D-69120 Heidelberg, Germany
[3] Univ Valle, Dept Fis, Cali, Colombia
来源：
PHYSICAL REVIEW A | 2013年 / 88卷 / 03期
关键词：
QUANTUM; ENERGY; LOCALIZATION; CHAOS; ATOMS;
D O I：
10.1103/PhysRevA.88.032119
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We study an experimentally realizable paradigm of complex many-body quantum systems, a two-band Wannier-Stark model, for which diffusion in Hilbert space as well as many-body Landau-Zener processes can be engineered. A crossover between regular and quantum chaotic spectra is found within the many-body avoided crossings at resonant tunneling conditions. The spectral properties are shown to determine the evolution of states across a cascade of Landau-Zener events. We apply the obtained spectral information to study the nonequilibrium dynamics of our many-body system in different parameter regimes.
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收藏
页数：12
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