Quantum phase transitions of hard-core bosons in background potentials.

Published

Journal Article

We study the zero temperature phase diagram of hard-core bosons in two dimensions subjected to three types of background potentials: staggered, uniform, and random. In all three cases there is a quantum phase transition from a superfluid (at small potential) to a normal phase (at large potential), but with different universality classes. As expected, the staggered case belongs to the XY universality, while the uniform potential induces a mean field transition. The disorder driven transition is clearly different from both; in particular, we find z approximately 1.4, nu approximately 1, and beta approximately 0.6.

Full Text

Duke Authors

Cited Authors

  • Priyadarshee, A; Chandrasekharan, S; Lee, J-W; Baranger, HU

Published Date

  • September 13, 2006

Published In

Volume / Issue

  • 97 / 11

Start / End Page

  • 115703 -

PubMed ID

  • 17025902

Pubmed Central ID

  • 17025902

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.97.115703

Language

  • eng