Asymmetric quantum correlations in the dynamical Casimir effect

Abstract

Considering the current available experimental studies on the dynamical Casimir effect (DCE) in superconducting microwave waveguides, we study asymmetric quantum correlations in microwave radiation. The asymmetric quantum correlations are created by the presence of detuning in the DCE. We study the asymmetric quantum steering and determine the parameter regions of one- and two-way quantum steering. It shows that steering from Bob to Alice is more difficult than steering from Alice to Bob. Moreover, we find regions that represent states that, although entangled, cannot be used for teleporting coherent states; however, the steerable states are appropriate for quantum teleportation. We investigate how the teleportation fidelity functions as an indicator of the quality of EPR steering in the DCE.

Fifty Years of the Dynamical Casimir Effect

“…Various aspects of the problem of entanglement in systems with moving mirrors (or their analogs) were considered in Refs. [143,144,333,346,361,363,[524][525][526][527][528][529][530][531][532][533][534][535][536][537][538][539]. The quantum discord in the DCE was the subject of studies [333,540].…”

Bell's inequality violation by dynamical Casimir photons in a superconducting microwave circuit

“…Quantum features such as entanglement, coherence and discord of noisy Casimir photons have been studied with respect to various circuit parameters [29,30]. Gaussian interferometric power, and steering have also been studied in presence of noise [31][32][33].…”

“…The quantum state of the microwave Casimir photons is a two mode squeezed thermal state [21-23, 23, 27, 29-33], though a NOON state has also been engineered using DCE array [34]. Several studies have been performed on quantum correlations of Casimir photons based on Gaussian measurement [27,[29][30][31][32][33].…”