Quantum coherence in the Dynamical Casimir Effect

Abstract

We propose to use quantum coherence as ultimate proof of quantum nature in the radiation that appears by means of the Dynamical Casimir Effect in experiments with superconducting microwave waveguides. We show that, unlike previously considered measurements of quantum correlations such as entanglement and discord, quantum coherence does not require a threshold value of the external pump amplitude and is highly robust to thermal noise.

v2:minor changes, published version. 7 pages, 2 figures

References in corpus (5)

• Measures and applications of quantum correlations
• Symplectic invariants, entropic measures and correlations of Gaussian states
• The dynamical Casimir effect in superconducting microwave circuits
• Homodyne estimation of Gaussian quantum discord
• Quantum discord in the Dynamical Casimir Effect

Cited by in corpus (9)

• Tripartite Genuine Non-Gaussian Entanglement in Three-Mode Spontaneous Parametric Downconversion
• Quantitative wave-particle duality relations from the density matrix properties
• Entanglement through qubit motion and the dynamical Casimir effect
• Digital quantum simulation of linear and nonlinear optical elements
• The influence of the Earth's curved spacetime on Gaussian quantum coherence
• Characterization of quantum and classical correlations in the Earth curved space-time
• Bell's inequality violation by dynamical Casimir photons in a superconducting microwave circuit
• Entangling superconducting qubits through an analogue wormhole
• Experimental demonstration of robustness of Gaussian quantum coherence