2001/05/16 by Petter Minnhagen, Beom Jun Kim, Hans Weber · 1 citation
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Physics of Superconductivity and Magnetism #Quantum, superfluid, helium dynamics #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevlett.87.037002
published as Phys. Rev. Lett. 87, 037002 (2001) · to appear in PRL
arxiv created 2001/05/16 · openalex publication_date 2001/06/29 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The dynamic critical exponent z is determined from numerical simulations for the three-dimensional (3D) lattice Coulomb gas (LCG) and the 3D XY models with relaxational dynamics. It is suggested that the dynamics is characterized by two distinct dynamic critical indices z0 and z related to the divergence of the relaxation time \ensuremathτ by \ensuremathτ\ensuremath∝\ensuremathξ^z0 and \ensuremathτ\ensuremath∝k^\ensuremath-z, where \ensuremathξ is the correlation length and k the wave vector. The values determined are z0\ensuremath≈1.5 and z\ensuremath≈1 for the 3D LCG and z0\ensuremath≈1.5 and z\ensuremath≈2 for the 3D XY model. Comparisons with other results are discussed.