PhysRevB.90.134505.pdf (723.92 kB)
Parametric amplification of vortex-antivortex pair generation in a Josephson junction
journal contribution
posted on 2015-08-19, 13:39 authored by G.R. Berdiyorov, M.V. Milosevic, Sergey SavelievSergey Saveliev, Feodor Kusmartsev, F.M. PeetersUsing 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.
Funding
This work was supported by the Flemish Science Foundation (FWO-Vl) and the Leverhulme Trust. G.R.B. acknowledges support from a EU-Marie Curie individual grant (Grant No. 253057)
History
School
- Science
Department
- Physics
Published in
PHYSICAL REVIEW BVolume
90Issue
13Pages
? - ? (7)Citation
BERDIYOROV, G.R. ... et al, 2014. Parametric amplification of vortex-antivortex pair generation in a Josephson junction. Physical Review B, 90 (13), 34505.Publisher
© The American Physical SocietyVersion
- VoR (Version of Record)
Publisher statement
This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/Publication date
2014Notes
This article was published in the journal, Physical Review B [© The American Physical Society].ISSN
1098-0121Publisher version
Language
- en