Advanced

Antiferromagnetic noise correlations in optical lattices

Bruun, Georg LU ; Syljuasen, O. F.; Pedersen, K. G. L.; Andersen, B. M.; Demler, E. and Sorensen, A. S. (2009) In Physical Review A (Atomic, Molecular and Optical Physics) 80(3).
Abstract
We analyze how noise correlations probed by time-of-flight experiments reveal antiferromagnetic (AF) correlations of fermionic atoms in two-dimensional and three-dimensional optical lattices. Combining analytical and quantum Monte Carlo calculations using experimentally realistic parameters, we show that AF correlations can be detected for temperatures above and below the critical temperature for AF ordering. It is demonstrated that spin-resolved noise correlations yield important information about the spin ordering. Finally, we show how to extract the spin correlation length and the related critical exponent of the AF transition from the noise.
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review A (Atomic, Molecular and Optical Physics)
volume
80
issue
3
publisher
American Physical Society (APS)
external identifiers
  • wos:000270383900153
  • scopus:70349766937
ISSN
1050-2947
DOI
10.1103/PhysRevA.80.033622
language
English
LU publication?
yes
id
44a8bd2e-04a6-4e6c-ab71-eda9fc574cee (old id 1489423)
date added to LUP
2009-10-22 11:55:55
date last changed
2017-01-01 04:58:50
@article{44a8bd2e-04a6-4e6c-ab71-eda9fc574cee,
  abstract     = {We analyze how noise correlations probed by time-of-flight experiments reveal antiferromagnetic (AF) correlations of fermionic atoms in two-dimensional and three-dimensional optical lattices. Combining analytical and quantum Monte Carlo calculations using experimentally realistic parameters, we show that AF correlations can be detected for temperatures above and below the critical temperature for AF ordering. It is demonstrated that spin-resolved noise correlations yield important information about the spin ordering. Finally, we show how to extract the spin correlation length and the related critical exponent of the AF transition from the noise.},
  author       = {Bruun, Georg and Syljuasen, O. F. and Pedersen, K. G. L. and Andersen, B. M. and Demler, E. and Sorensen, A. S.},
  issn         = {1050-2947},
  language     = {eng},
  number       = {3},
  publisher    = {American Physical Society (APS)},
  series       = {Physical Review A (Atomic, Molecular and Optical Physics)},
  title        = {Antiferromagnetic noise correlations in optical lattices},
  url          = {http://dx.doi.org/10.1103/PhysRevA.80.033622},
  volume       = {80},
  year         = {2009},
}