Quantum Critical Phenomena of 4He in Nanoporous Media

Details Quantum Critical Phenomena of 4He in Nanoporous Media Quantum Critical Phenomena of 4He in Nanoporous Media

2010-04-22

arxiv.org/abs/1004.4004v1

Physics

Condensed Matter

Statistical Mechanics

4 pages, 3 figures

Scientific paper

The superfluid transition in liquid 4He filled in Gelsil glass observed in recent experiments is discussed in the framework of quantum critical phenomena. We show that quantum fluctuations of phase are indeed important at the experimentally studied temperature range owing to the small pore size of Gelsil, in contrast to 4He filled in previously studied porous media such as Vycor glass. As a consequence of an effective particle-hole symmetry, the quantum critical phenomena of the system are described by the 4D XY universality class, except at very low temperatures. The simple scaling agrees with the experimental data remarkably well.

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