Quantum discord in the Dynamical Casimir Effect
Carlos Sab\'in, Ivette Fuentes, G\"oran Johansson
TL;DR
This paper investigates how the dynamical Casimir effect in superconducting waveguides can generate quantum discord, which is easier to produce than entanglement and useful for quantum cryptography.
Contribution
It demonstrates that quantum discord can be generated under less restrictive conditions than entanglement in the dynamical Casimir effect, highlighting its potential for quantum information.
Findings
Quantum discord can be generated with realistic experimental parameters.
States with non-zero discord and zero entanglement are produced.
Generated discord states are useful for quantum cryptography.
Abstract
We analyse the generation of quantum discord by means of the dynamical Casimir effect in superconducting waveguides 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 non-classicality. The states with non-zero discord and zero entanglement generated by the dynamical Casimir effect are a useful resource for quantum cryptography.
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