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.
Highlights
Considering the current available experimental studies on the dynamical Casimir effect (DCE) in superconducting microwave waveguides, we study asymmetric quantum correlations in microwave radiation
We focus on two points: the asymmetric nature caused by the detuning in the DCE and how the teleportation fidelity works as an indicator in continuous variable (CV) teleportation protocols
We have analyzed asymmetric quantum correlations of the DCE in a superconducting circuit terminated by a superconducting quantum interference device (SQUID)
Summary
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 investigate how the teleportation fidelity functions as an indicator of the quality of EPR steering in the DCE. In contrast to symmetric systems, we show how one can produce a desired EPR state to fulfill a given directional quantum task by adding asymmetric amounts of detuning to each subsystem in the DCE. The teleportation fidelity becomes an indicator of the quality of the EPR steering in the DCE. We include a detailed discussion on the relationship between the different entanglement markers and the teleportation fidelity for the DCE.
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