Critical Dynamics of the Dirty Boson Problem: Revisiting the Equality z=d

Journal Article · Fri Jun 15 00:00:00 EDT 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.98.245701· OSTI ID:20953292

Weichman, Peter B ^[1]; Mukhopadhyay, Ranjan ^[2]

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1. BAE Systems, Advanced Information Technologies, 6 New England Executive Park, Burlington, Massachusetts 01803 (United States)
2. Department of Physics, Clark University, Worcester, Massachusetts 01610 (United States)

It is shown that previous arguments, leading to the equality z=d for the dynamical exponent describing the Bose glass to superfluid transition in d dimensions, may break down, as apparently seen in recent simulations. The key observation is that the major contribution to the compressibility, which remains finite through the transition and was predicted to scale as {kappa}{approx} vertical bar {delta} vertical bar{sup (d-z){nu}} (where {delta} is the deviation from criticality and {nu} is the correlation length exponent) comes from the analytic, not the singular part of the free energy, and is not restricted by any conventional scaling hypothesis.

• OSTI ID: 20953292
• Journal Information: Physical Review Letters, Vol. 98, Issue 24; Other Information: DOI: 10.1103/PhysRevLett.98.245701; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BOSONS
COMPRESSIBILITY
CRITICALITY
FREE ENERGY
GLASS
SIMULATION
SUPERFLUIDITY