Photon generation in an electromagnetic cavity with a time-dependent boundary
Abstract
We report the observation of photon generation in a microwave cavity with a time-dependent boundary condition. Our system is a microfabricated quarter-wave coplanar waveguide cavity. The electrical length of the cavity is varied using the tunable inductance of a superconducting quantum interference device. It is measured in the quantum regime, where the temperature is significantly less than the resonance frequency (~ 5 GHz). When the length is modulated at approximately twice the static resonance frequency, spontaneous oscillations of the cavity field are observed. Time-resolved measurements of the dynamical state of the cavity show multiple stable states. The behavior is well described by theory. Connections to the dynamical Casimir effect are discussed.
Keywords
Cite
@article{arxiv.1006.2540,
title = {Photon generation in an electromagnetic cavity with a time-dependent boundary},
author = {C. M. Wilson and T. Duty and M. Sandberg and F. Persson and V. Shumeiko and P. Delsing},
journal= {arXiv preprint arXiv:1006.2540},
year = {2011}
}
Comments
5 pages, 3 Figures