Journal article
Momentum-Space Josephson Effects
Physical review letters, Vol.120(12), pp.120401-120401
03/23/2018
Handle:
https://hdl.handle.net/2376/108424
PMID: 29694081
Abstract
The Josephson effect is a prominent phenomenon of quantum supercurrents that has been widely studied in superconductors and superfluids. Typical Josephson junctions consist of two real-space superconductors (superfluids) coupled through a weak tunneling barrier. Here we propose a momentum-space Josephson junction in a spin-orbit coupled Bose-Einstein condensate, where states with two different momenta are coupled through Raman-assisted tunneling. We show that Josephson currents can be induced not only by applying the equivalent of "voltages," but also by tuning tunneling phases. Such tunneling-phase-driven Josephson junctions in momentum space are characterized through both full mean field analysis and a concise two-level model, demonstrating the important role of interactions between atoms. Our scheme provides a platform for experimentally realizing momentum-space Josephson junctions and exploring their applications in quantum-mechanical circuits.
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Details
- Title
- Momentum-Space Josephson Effects
- Creators
- Junpeng Hou - Department of Physics, The University of Texas at Dallas, Richardson, Texas 75080-3021, USAXi-Wang Luo - Department of Physics, The University of Texas at Dallas, Richardson, Texas 75080-3021, USAKuei Sun - Department of Physics, The University of Texas at Dallas, Richardson, Texas 75080-3021, USAThomas Bersano - Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164, USAVandna Gokhroo - Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164, USASean Mossman - Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164, USAPeter Engels - Department of Physics and Astronomy, Washington State University, Pullman, Washington 99164, USAChuanwei Zhang - Department of Physics, The University of Texas at Dallas, Richardson, Texas 75080-3021, USA
- Publication Details
- Physical review letters, Vol.120(12), pp.120401-120401
- Academic Unit
- Physics and Astronomy, Department of
- Publisher
- United States
- Identifiers
- 99900547320201842
- Language
- English
- Resource Type
- Journal article