Open AccessGeneration of multiqubit steady-state quantum correlation by squeezed-reservoir engineering
Author(s) -
Qizhe Hou,
Jiabin You,
Wanli Yang,
JunHong An,
Changyong Chen,
Mang Feng
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.020459
Subject(s) - physics , quantum correlation , squeezed coherent state , quantum , field (mathematics) , quantum mechanics , quantum optics , lossy compression , vacuum state , cavity quantum electrodynamics , quantum entanglement , quantum discord , open quantum system , coherent states , computer science , mathematics , pure mathematics , artificial intelligence
Stationary quantum correlation among two-level systems (TLSs) in steady state is one of unique resources for applications in quantum information processing. Here we propose a scheme to generate such quantum correlation among the TLSs inside a lossy cavity. It is found that, by applying a broadband squeezed laser acting as a squeezed-vacuum reservoir to the cavity, a stable quantum correlation of the TLSs can be generated. By adiabatically eliminating the cavity field, we derive a reduced master equation of the TLSs in the bad-cavity limit. We show that the generated quantum correlation is essentially determined by the squeezing features transferred from the squeezed-vacuum reservoir via the cavity field as a quantum bus. We study the effect of the system parameters, such as the squeezing, the detuning, the coupling strength, and the decay rate of the TLSs, on the performance of the scheme. The feasibility of our proposal is supported by the application of currently available experimental techniques.