Flux locking a superfluid interferometer
classification
❄️ cond-mat.other
keywords
fluxinterferometersuperfluidcurrentfeedbackheatinjectedlocking
read the original abstract
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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