https://doi.org/10.1140/epjd/e2018-90243-3
Regular Article
Non-Gaussian correlation estimates of two-mode hybrid entangled states via cross-Kerr medium and cumulant method
School of Mechanical, Optoelectronics and Physics, Huaihua University,
Huaihua
418008, P.R. China
a e-mail: shxiang97@163.com
Received:
21
May
2018
Received in final form:
30
July
2018
Published online: 18 October 2018
We characterize the non-Gaussian character of two-mode continuous-variable states based on the phase-averaged cumulant approach. We study the dynamics of non-Gaussianity of two-mode hybrid entangled states generated via the cross-Kerr nonlinearity by analyzing the fourth-order phase-averaged cumulant. It is shown that for a case of stronger coherent for one incident light, the non-Gaussianity undergoes some oscillations conditioned on the initial conditions of another incident light. Interestingly, one can simultaneously obtain the two-mode state’s maximum entanglement and highly non-Gaussian correlations by controlling the cross-Kerr interaction. Finally, we discuss the relationship between the entanglement and the variational non-Gaussianity of such states.
Key words: Quantum Optics
© EDP Sciences / Società Italiana di Fisica / Springer-Verlag GmbH Germany, part of Springer Nature, 2018