Dynamical Casimir Effect in a Superconducting Coplanar Waveguide
Göran Johansson
Chalmers University of Technology, Göteborg
Friday, 10 September 2010, 11:15
Matfys library
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.