Coherent destruction of tunneling in a lattice array with a controllable boundary

Liping Li, Xiaobing Luo, Xin-You Lü, Xiaoxue Yang, and Ying Wu
Phys. Rev. A 91, 063804 – Published 3 June 2015

Abstract

We have investigated how the dynamics of a quantum particle initially localized in the left boundary site under periodic driving can be manipulated via control of the right boundary site of a lattice array. Because of the adjustable coupling between the right boundary site and its nearest neighbor, we can realize either coherent destruction of tunneling to coherent tunneling (CDT-CT) transition or coherent tunneling to coherent destruction of tunneling (CT-CDT) transition, by driving the right boundary site while keeping the left boundary site driven by a periodically oscillating field with a fixed driving parameter. In addition, we have also revealed that our proposed CDT-CT transition is robust against the second-order coupling (SOC) between next-nearest-neighbor sites in a three-site system, whereas localization can be significantly enhanced by SOC in a four-site system.

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  • Received 25 February 2015

DOI:https://doi.org/10.1103/PhysRevA.91.063804

©2015 American Physical Society

Authors & Affiliations

Liping Li1, Xiaobing Luo2, Xin-You Lü1,*, Xiaoxue Yang1, and Ying Wu1,†

  • 1Wuhan National Laboratory for Optoelectronics and School of Physics, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
  • 2Department of Physics, Jinggangshan University, Ji'an 343009, People's Republic of China

  • *xinyoulu@gmail.com
  • yingwu2@126.com

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Vol. 91, Iss. 6 — June 2015

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