Open AccessNonlinear coupling between a nitrogen-vacancy-center ensemble and a superconducting qubit
Author(s) -
Qiong Chen,
Jun Wen,
Wanli Yang,
Mang Feng,
Jiangfeng Du
Publication year - 2015
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.23.001615
Subject(s) - physics , qubit , resonator , coupling (piping) , charge qubit , circuit quantum electrodynamics , nonlinear system , superconductivity , photon , flux qubit , phase qubit , transmission line , condensed matter physics , quantum mechanics , quantum , optoelectronics , materials science , electrical engineering , metallurgy , engineering
By exchange of virtual microwave photon induced by a transmission line resonator, the nonlinear interaction between a nitrogen-vacancy-center ensemble (NVE) and a superconducting charge qubit is achieved in circuit quantum electrodynamics, where the nonlinear coupling results from the second order of the coupling between the magnetic field of the transmission line resonator and the charge qubit. In our case, the nonlinear coupling can be much enhanced by a factor of the total spin number in the NVE. As an application, we present a potentially practical scheme to realize the squeezing of the NVE using the nonlinear coupling, which is within reach of the currently available technology.