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Dynamical Casimir effect in a superconducting coplanar waveguide.

J R Johansson1, G Johansson, C M Wilson

  • 1Advanced Science Institute, The Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama 351-0198, Japan.

Physical Review Letters
|November 13, 2009
PubMed
Summary
This summary is machine-generated.

Researchers demonstrate the dynamical Casimir effect using a superconducting quantum interference device (SQUID) in a coplanar waveguide. This setup generates broadband photon radiation, experimentally feasible for detection.

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Area of Science:

  • Quantum optics
  • Solid-state physics
  • Superconducting circuits

Background:

  • The dynamical Casimir effect predicts photon generation from changing boundary conditions.
  • Superconducting quantum interference devices (SQUIDs) offer tunable circuit parameters.

Purpose of the Study:

  • Investigate the dynamical Casimir effect in a coplanar waveguide (CPW) terminated by a SQUID.
  • Explore broadband photon generation via modulated boundary conditions.

Main Methods:

  • Utilized a CPW terminated by a SQUID.
  • Parametrically modulated the CPW's boundary condition using magnetic flux.
  • Analyzed the resulting broadband photon generation.

Main Results:

  • Achieved broadband photon generation by modulating the SQUID's magnetic flux.
  • Photon generation matched theoretical predictions for the dynamical Casimir effect.
  • Estimated radiation power for realistic parameters.

Conclusions:

  • Direct detection of nonclassical broadband radiation from the dynamical Casimir effect in a CPW-SQUID system is experimentally feasible.
  • This work provides a novel platform for studying fundamental quantum phenomena.