Phys. Rev. B 81, 172502 (2010) [4 pages]Fiske-amplified superfluid interferometryReceived 22 February 2010; published 17 May 2010 We report an experimental demonstration of signal amplification for a superfluid 4He interferometer by allowing the matter waves from two Josephson mass current sources to interact with the resonances within the experimental cell. We characterize the interferometer using an external phase shift and demonstrate a 30-fold enhancement in intrinsic phase sensitivity. We also demonstrate a truly continuous operation of this interference device. © 2010 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.81.172502
DOI:
10.1103/PhysRevB.81.172502
PACS:
67.25.dg, 07.60.Ly, 85.25.Dq, 03.75.Lm
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