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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.
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author
; ; ; ; and
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
external identifiers
  • wos:000270383900153
  • scopus:70349766937
ISSN
1050-2947
DOI
10.1103/PhysRevA.80.033622
language
English
LU publication?
yes
additional info
The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Mathematical Physics (Faculty of Technology) (011040002)
id
44a8bd2e-04a6-4e6c-ab71-eda9fc574cee (old id 1489423)
date added to LUP
2016-04-01 12:15:18
date last changed
2021-03-24 01:27:39
@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},
  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},
  doi          = {10.1103/PhysRevA.80.033622},
  volume       = {80},
  year         = {2009},
}