Fizika Nizkikh Temperatur: Volume 44, Number 10 (October 2018), p. 1259-1268    ( to contents , go back )

Nucleation at quantized vortices and the heterogeneous phase separation in supersaturated superfluid 3He–4He liquid mixtures

S.N. Burmistrov and L.B. Dubovskii

NRC "Kurchatov Institute", Moscow 123182, Russia
Moscow Institute of Physics and Technology, Dolgoprudnyi 141700, Russia
E-mail: burmistrov_sn@nrcki.ru

Received March 1, 2018, published online August 28, 2018

Abstract

Supersaturated superfluid 3He–4He liquid mixture, separating into the 3He-concentrated c-phase and 3He-diluted d-phase, represents a unique possibility for studying macroscopic quantum nucleation and quantum phase-separation kinetics in binary mixtures at low temperatures down to absolute zero. One of possible heterogeneous mechanisms for the phase separation of supersaturated d-phase is associated with superfluidity of this phase and with a possible existence of quantized vortices playing a role of nucleation sites for the c-phase of liquid mixture. We analyze the growth dynamics of vortex core filled with the c-phase and determine the temperature behavior of c-phase nucleation rate and the crossover temperature between the classical and quantum nucleation mechanisms.

Key words: macroscopic quantum nucleation, supersaturated superfluid 3He–4He liquid mixture, quantized vortex, heterogenous phase separation.

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