Parametric amplification of vortex-antivortex pair generation in a Josephson junction

Golibjon Berdiyorov, M. V. Milošević, S. Savel'Ev, F. Kusmartsev, F. M. Peeters

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Using advanced three-dimensional simulations, we show that an Abrikosov vortex, trapped inside a cavity perpendicular to an artificial Josephson junction, can serve as a very efficient source for generation of Josephson vortex-antivortex pairs in the presence of the applied electric current. In such a case, the nucleation rate of the pairs can be tuned in a broad range by an out-of-plane ac magnetic field in a broad range of frequencies. This parametrically amplified vortex-antivortex nucleation can be considered as a macroscopic analog of the dynamic Casimir effect, where fluxon pairs mimic the photons and the ac magnetic field plays the role of the oscillating mirrors. The emerging vortex pairs in our system can be detected by the pronounced features in the measured voltage characteristics, or through the emitted electromagnetic radiation, and exhibit resonant dynamics with respect to the frequency of the applied magnetic field. Reported tunability of the Josephson oscillations can be useful for developing high-frequency emission devices.

Original languageEnglish
Article number134505
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume90
Issue number13
DOIs
Publication statusPublished - 6 Oct 2014

    Fingerprint

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this