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Quantum turbulence in superfluid He-3 illuminated by a beam of quasiparticle excitations.

Research output: Contribution to journalJournal article

Published

Journal publication date12/2004
JournalPhysical Review Letters
Journal number23
Volume93
Number of pages0
Pages235302
Original languageEnglish

Abstract

We have measured directly the Andreev scattering of a controllable beam of quasiparticle excitations by a localized tangle of quantum vortices in superfluid He-3-B at low temperatures. We present a microscopic description of the Andreev scattering from a vortex line allowing us to estimate the vortex separation scale in a dilute tangle of vortices, providing a better comparison of the observed decay time of the turbulence with recent numerical simulations. The experiments also suggest that below 200 muK we reach the low temperature limit for turbulent dynamics.