Nonlocal Josephson effect in Andreev molecules

Autor:	Pillet, J. -D., Benzoni, V., Griesmar, J., Smirr, J. -L., Girit, Ç. Ö.
Rok vydání:	2018
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Superconductivity
Zdroj:	Nano Letters 2019 19 (10), 7138-7143
Druh dokumentu:	Working Paper
DOI:	10.1021/acs.nanolett.9b02686
Popis:	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 non-local current-phase relation for arbitrary separation. We demonstrate the possibility of creating a $\varphi$-junction and propose experiments to verify our predictions. Andreev molecules may have potential applications in quantum information, metrology, sensing, and molecular simulation. Comment: 19 pages, 4 figures, accepted version
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1809.11011 Zobrazit plný text záznamu View this record from Arxiv