Quantum discord in the dynamical Casimir effect

Author(s): C.Sabín, I. Fuentes, G. Johansson

Journal: Phys. Rev. A

Volume: 92

Page(s): 012314

Year: 2015

DOI Number: 10.1103/PhysRevA.92.012314

Link: Link to publication

Abstract:

We analyze the generation of quantum discord by means of the dynamical Casimir effect in superconducting wave guides modulated by superconducting quantum interferometric devices. We show that for realistic experimental parameters, the conditions for the existence of quantum discord are less demanding than the previously considered for quantum entanglement or nonclassicality. These results could facilitate the experimental confirmation of the quantum nature of the dynamical Casimir effect radiation. Moreover, the states with nonzero discord and zero entanglement generated by the dynamical Casimir effect are a useful resource for quantum cryptography.

Fuentes Group Fuentes Group