Dynamical Casimir effect via modulated Kerr or higher nonlinearities

TL;DR

This paper demonstrates how the dynamical Casimir effect can be realized by modulating Kerr or higher nonlinearities, leading to photon creation from vacuum with distinctive photon statistics.

Contribution

It introduces two novel methods for achieving the dynamical Casimir effect through nonlinear modulation, supported by analytic and numerical analysis.

Findings

Photon creation from vacuum demonstrated

Distinct hyper-Poissonian photon statistics observed

Analytic and numerical methods confirm the effect

Abstract

We show two examples in which the dynamical Casimir effect can be achieved by modulating the Kerr or higher order nonlinearities. In the first case the cavity field is coupled to an arbitrary number of qubits or an harmonic oscillator via the dipole interaction. In the second case, the modulation of the nonlinearities is accompanied by the off-resonance modulation of the cavity frequency. We present the analytic description of the phenomenon and supplement it with numeric simulations, demonstrating that photons can be created from vacuum and the resulting hyper-Poissonian photon statistics is very different from the squeezed vacuum state.