期刊
NANO LETTERS
卷 19, 期 10, 页码 7138-7143出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.9b02686
关键词
Superconductivity; Josephson junction; Andrew bound states; superconducting circuits; quantum information
类别
资金
- Jeunes Equipes de l'Institut de Physique du College de France
- IDEX Grant [ANR-10-IDEX-0001-02 PSL]
- Paris Programme Emergence(s) Grant
- European Research Council (ERC) under the European Union [636744]
- European Research Council (ERC) [636744] Funding Source: European Research Council (ERC)
We propose the Andreev molecule, an artificial quantum system composed of two closely spaced Josephson junctions. The coupling between Josephson junctions in an Andreev molecule occurs through the overlap and hybridization of the junction's atomic orbitals, Andreev Bound States. A striking consequence is that the supercurrent flowing through one junction depends on the superconducting phase difference across the other junction. Using the Bogolubiov-de-Gennes formalism, we derive the energy spectrum and nonlocal current-phase relation for arbitrary separation. We demonstrate the possibility of creating a phi-junction and propose experiments to verify our predictions. Andreev molecules may have potential applications in quantum information, metrology, sensing, and molecular simulation.
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