Quantum Critical Behavior of Disordered Superfluids

Abstract

The quantum critical behavior of an interacting, non-relativistic Bose theory with quenched disorder randomly distributed in space is investigated. The renormalization group is carried out in a double $\epsilon$ expansion, where one $\epsilon$ is the deviation of the effective space-time dimensionality from 4, while the other denotes the number of time dimensions. The disordered theory, which displays localization in the superfluid state, is shown to possess an infrared stable fixed point.

REVTEX, 5 pages

Cited by in corpus (5)

• Superfluid Bosons and Flux Liquids: Disorder, Thermal Fluctuations, and Finite-Size Effects
• Some basic aspects of quantum phase transitions
• Superfluids, Fluctuations and Disorder
• Critical behaviour of thin films with quenched impurities
• Effective field theory of bosons with finite-range interaction in a disordered environment