Program

P.9 -- Poster, IWTCP-3

Date: Wednesday, 29 July 2015

Time: 08h30 - 10h00

Transient super-ballistic spreading of wave packets in hybrid ordered-quasiperiodic lattices

Ba Phi Nguyen (1) and Duy Khuong Phung (2)

(1) Department of Basic Sciences, Mien Trung University of Civil Engineering, 24 Nguyen Du, Tuy Hoa, Vietnam; (2) Center for Theoretical Physics, Institute of Physics, Vietnam Academy of Science and Technology, 10 Dao Tan, Hanoi, Vietnam Email: nguyenbaphi@muce.edu.vn

In this work, we numerically demonstrate that hybrid ordered-quasiperiodic lattices can support the super-ballistic spreading of an initially-localized wave packet with very large exponents for certain transient time windows. Remarkably, in the case of the sublattice with on-site potential obeys the period-doubling quasiperiodic sequence, we find that the super-ballistic exponent is beyond five. Keywords: super-ballistic spreading, wave packet dynamcis, lattice dynamics, quantum transport. Reference: [1]. L. Hufnage, R. Ketzmerick, T. Kottos and T. Geisel, Phys. Rev. E 64, 012301 (2001). [2]. J. Fitzsimons and J. Twamley, Phys. Rev. A 72, 05030 (2005). [3] Z. Zhang , P. Tong, J. Gong and B. Li, Phys. Rev. Lett. 108, 070603 (2012). [4] S. Stutzer, T. Kottos, A. Tunnermann, S. Notle, D. N. Christodoulides and A. Szameit, Opt. Lett. 38, 4675 (2013).

Presenter: Nguyen Ba Phi