New signatures of the dynamical Casimir effect in a superconducting circuit

Abstract

We found new signatures of the dynamical Casimir effect (DCE) in the context of superconducting circuits. We show that if the recent experiment made by Wilson {\it et al}, which brought the DCE into reality for the first time, is repeated with slight modifications (for instance, different values for the capacitance of the SQUID), three remarkable results will show up, namely: {\it (i)} a quite different spectral distribution for the created particles, deviating from the typical parabolic shape; {\it (ii)} an enhancement by a factor of approximately $5\times 10^3$ in the number of created particles with half driven frequency of the effective moving mirror and {\it (iii)} an enhancement by a factor of $3\times 10^2$ in the particle creation rate. These results may guide the experimentalists in their search for alternative routes to observe the DCE in future experiments.

arXiv comment11 pages, 5 figures

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• Superconducting circuit boundary conditions beyond the Dynamical Casimir Effect
• Dynamical Casimir effect in a double tunable superconducting circuit
• Dynamical Casimir effect in superconducting circuits: a numerical approach
• Dynamical Casimir effect via modulated Kerr or higher nonlinearities
• Dynamical Casimir effect enhanced by decreasing the mirror reflectivity