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Dynamical Casimir Effect in a Superconducting Coplanar Waveguide

J. R. Johansson, G. Johansson, C. M. Wilson, and Franco Nori
Phys. Rev. Lett. 103, 147003 – Published 28 September 2009
Physics logo See Synopsis: How to accelerate the wall of an optical waveguide

Abstract

We investigate the dynamical Casimir effect in a coplanar waveguide (CPW) terminated by a superconducting quantum interference device (SQUID). Changing the magnetic flux through the SQUID parametrically modulates the boundary condition of the CPW, and thereby, its effective length. Effective boundary velocities comparable to the speed of light in the CPW result in broadband photon generation which is identical to the one calculated in the dynamical Casimir effect for a single oscillating mirror. We estimate the power of the radiation for realistic parameters and show that it is experimentally feasible to directly detect this nonclassical broadband radiation.

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  • Received 25 June 2009

DOI:https://doi.org/10.1103/PhysRevLett.103.147003

©2009 American Physical Society

Synopsis

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How to accelerate the wall of an optical waveguide

Published 28 September 2009

By generalizing the idea of a moveable mirror, it may be possible to observe the dynamical Casimir effect.

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Authors & Affiliations

J. R. Johansson1,2, G. Johansson2, C. M. Wilson2, and Franco Nori1,3

  • 1Advanced Science Institute, The Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama 351-0198, Japan
  • 2Microtechnology and Nanoscience, MC2, Chalmers University of Technology, SE-412 96 Göteborg, Sweden
  • 3Physics Department, The University of Michigan, Ann Arbor, Michigan 48109-1040, USA

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Issue

Vol. 103, Iss. 14 — 2 October 2009

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