Spin-asymmetric Josephson plasma oscillations

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2017-01
Major/Subject
Mcode
Degree programme
Language
en
Pages
1-9
Series
PHYSICAL REVIEW A, Volume 95, issue 1
Abstract
The spin-asymmetric Josephson effect is a proposed quantum-coherent tunnelling phenomenon where Cooper-paired fermionic spin-12 particles, which are subjected to spin-dependent potentials across a Josephson junction, undergo frequency-synchronized alternating-current Josephson oscillations with spin-dependent amplitudes. Here, in line with present-day techniques in ultracold Fermi gas setups, we consider the regime of small Josephson oscillations and show that the Josephson plasma oscillation amplitude becomes spin-dependent in the presence of spin-dependent potentials while the Josephson plasma frequency is the same for both spin-components. Detecting these spin-dependent Josephson plasma oscillations provides a possible means to establish the yet-unobserved spin-asymmetric Josephson effect with ultracold Fermi gases using existing experimental tools.
Description
Keywords
superconductivity, quantum physics
Other note
Citation
Kreula , J , Valtolina , G & Törmä , P 2017 , ' Spin-asymmetric Josephson plasma oscillations ' , Physical Review A , vol. 95 , no. 1 , 013634 , pp. 1-9 . https://doi.org/10.1103/PhysRevA.95.013634