Floquet modulation of \hbox{$\mathcal{PT}$}PT symmetry in an atomic Bose-Josephson junction

We study a periodically driven \hbox{$\mathcal{PT}$}PT-symmetric Bose-Josephson junction and explore how the driving field affects the \hbox{$\mathcal{PT}$}PT symmetry in such a non-Hermitian many-body quantum system. In the absence of interaction, by employing the high-frequency Floquet method, the...

Full description

Saved in:
Bibliographic Details
Published in:The European physical journal. D, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2016-07, Vol.70 (7), Article 157
Main Authors: Zhong, Honghua, Zhu, Bo, Qin, Xizhou, Huang, Jiahao, Ke, Yongguan, Zhou, Zheng, Lee, Chaohong
Format: Article
Language:English
Subjects:
Applications of Nonlinear Dynamics and Chaos Theory
Atomic
Molecular
Optical and Plasma Physics
Physical Chemistry
Physics
Physics and Astronomy
Quantum Information Technology
Quantum Physics
Regular Article
Spectroscopy/Spectrometry
Spintronics
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We study a periodically driven \hbox{$\mathcal{PT}$}PT-symmetric Bose-Josephson junction and explore how the driving field affects the \hbox{$\mathcal{PT}$}PT symmetry in such a non-Hermitian many-body quantum system. In the absence of interaction, by employing the high-frequency Floquet method, the condition of spontaneous \hbox{$\mathcal{PT}$}PT-symmetry-breaking transition is analytically given. In the presence of interaction, it is found that even weak atom-atom interaction can shift the critical point of the \hbox{$\mathcal{PT}$}PT-symmetry-breaking transition. Furthermore, we numerically obtain the \hbox{$\mathcal{PT}$}PT-symmetric phase diagram, where the region of unbroken \hbox{$\mathcal{PT}$}PT symmetry sensitively depends on the interaction strength and the driving parameter. Our results provide a promising way for manipulating \hbox{$\mathcal{PT}$}PT-symmetric many-body quantum system by utilizing periodic driving fields. Graphical abstract
ISSN:1434-6060
1434-6079
DOI:10.1140/epjd/e2016-70240-4