Phys. Rev. Lett. 103, 087003 (2009) [4 pages]Optimizing Anharmonicity in Nanoscale Weak Link Josephson Junction OscillatorsReceived 13 May 2009; published 19 August 2009 We compute the current phase relation for superconducting weak links, with dimensions comparable to the zero temperature coherence length, connected to two and three dimensional superconducting electrodes. Our results indicate that 50–100 nm long aluminum nanobridges with three dimensional banks have sufficient anharmonicity for realizing low noise amplifiers and quantum bits. Such weak link junctions thus present a practical new route for realizing sensitive quantum circuits with potentially higher quality factor than tunnel junction devices due to the absence of a lossy oxide layer. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.103.087003
DOI:
10.1103/PhysRevLett.103.087003
PACS:
85.25.Cp, 74.50.+r
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