Scientific Results

Spin-asymmetric Josephson plasma oscillations

Year: 2017

Authors: Kreula J. M., Valtolina G., Torma P.

Autors Affiliation: Univ Oxford, Clarendon Lab, Parks Rd, Oxford OX1 3PU, England; CNR, Ist Nazl Ott, I-50019 Sesto Fiorentino, Italy;‎ European Lab Nonlinear Spect, I-50019 Sesto Fiorentino, Italy; Aalto Univ, Dept Appl Phys, COMP Ctr Excellence, Aalto 00076, Finland

Abstract: The spin-asymmetric Josephson effect is a proposed quantum-coherent tunneling phenomenon where Cooper-paired fermionic spin-1/2 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 linewith 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.

Journal/Review: PHYSICAL REVIEW A

Volume: 95 (1)      Pages from: 013634-1  to: 013634-9

KeyWords: FERROMAGNET; BOSE; SUPERFLUIDS; FERMIONS; PHYSICS
DOI: 10.1103/PhysRevA.95.013634

Citations: 2
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