No robust phases in aerogel: 3He-A with orientational disorder in the Ginzburg-Landau model

Details No robust phases in aerogel: 3He-A with orientational disorder in the Ginzburg-Landau model No robust phases in aerogel: 3He-A with orientational disorder in the Ginzburg-Landau model

2005-05-11

arxiv.org/abs/cond-mat/0505281v3

JETP Lett. 81 (2005) 647-649; Pis'ma ZhETF 81 (2005) 784-786

Physics

Condensed Matter

Disordered Systems and Neural Networks

5 pages, no figures, Comment to papers by I.A. Fomin on robust phases, version submitted to JETP Letters, reference added

Scientific paper

In series of papers Fomin introduced and discussed the so-called robust phases in a system with frozen orientational disorder (with application to superfluid 3He in aerogel). We show that his consideration is based on the erroneous overestimation of the fluctuation energy which comes from the interaction of the Goldstone modes with the frozen disorder. This interaction leads to the Imry-Ma effect, which destroys the orientational order, but is unable to destroy the local structure of the A-phase. There is no ground for the robust phases.

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