Flux locking a superfluid interferometer

Details Flux locking a superfluid interferometer Flux locking a superfluid interferometer

2007-08-23

arxiv.org/abs/0708.3236v1

Y. Sato, A. Joshi, and R. Packard, Appl. Phys. Lett. 91, 074107 (2007)

Physics

Condensed Matter

Other Condensed Matter

3 pages, 2 figures

Scientific paper

10.1063/1.2772659

We demonstrate a flux locking technique using injected heat current to linearize the output of a superfluid helium-4 interferometer. A rotation flux through the interferometer loop produces a shift in the phase of the superfluid order parameter. This shift is nullified via negative feedback by a phase-shift caused by the injected heat current. The feedback signal is then a linear function of rotation flux.

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