Signatures of inter-band transitions on dynamical localization

Signatures of inter-band transitions on dynamical localization
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动态定位的带间转换特征

DOI:
10.1140/epjd/e2020-100489-1
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发表时间:
2020
期刊:
The European Physical Journal D
影响因子:
--
通讯作者:
Watanabe Shinichi
Watanabe Shinichi
中科院分区:
--
文献类型:
--
作者:
Medhet Sara;Yamakoshi Tomotake;Ayub Muhammad;Saif Farhan;Watanabe Shinichi

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本文解释了振幅调制光晶格中超冷原子的动力学行为。我们证明了动力学局域化的存在,表现为冷原子在动力学系统中表现出经典混沌的量子抑制。在调制幅度的某些窗口内,指数局域化既发生在动量空间,也发生在坐标空间。结果表明,由于光晶格中的振幅调制而发生的带间跃迁对控制物质波的动力学局域化起着重要的作用。我们所得到的结果可以推广到其他动力系统,并且当我们考虑当前可用实验的参数值时,可以通过实验实现。图形摘要
AbstractWe explain the dynamics of ultracold atoms in amplitude modulated optical lattice with harmonic confinement. We show the existence of dynamical localization that manifests itself as the cold atoms exhibit quantum suppression of classical chaos in the dynamical system. The exponential localization takes place both in momentum as well as in coordinate space within certain windows on modulation amplitude. We show that inter-band transitions, taking place due to the amplitude modulation in optical lattice, play an important role in controlling the dynamical localization of matter waves. Our obtained results can be generalized to other dynamical systems and are experimentally realizable as we consider the values of parameters from the present-day available experiments.Graphical abstract
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