Using superlattice potentials to probe long-range magnetic correlations in optical lattices

Kim G. L. Pedersen, Brian M. Andersen, Georg M. Bruun, and Anders S. Sørensen
Phys. Rev. A 92, 063633 – Published 28 December 2015

Abstract

We previously proposed [K. G. L. Pedersen, B. M. Andersen, G. M. Bruun, O. F. Syljuåsen, and A. S. Sørensen, Phys. Rev. A 84, 041603 (2011)] a method to utilize a temporally dependent superlattice potential to mediate spin-selective transport and thereby probe long- and short-range magnetic correlations in optical lattices. Specifically, this can be used for detecting antiferromagnetic ordering in repulsive fermionic optical lattice systems, but more generally it can serve as a means of directly probing correlations among the atoms by measuring the mean value of an observable, the number of double occupied sites. Here we provide a detailed investigation of the physical processes that limit the effectiveness of this “conveyer belt method.” Furthermore, we propose a simple way to improve the procedure, resulting in an essentially perfect (error-free) probing of the magnetic correlations. These results shows that suitably constructed superlattices constitute a promising way of manipulating atoms of different spin species as well as probing their interactions.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
2 More
  • Received 3 September 2015

DOI:https://doi.org/10.1103/PhysRevA.92.063633

©2015 American Physical Society

Authors & Affiliations

Kim G. L. Pedersen1, Brian M. Andersen2, Georg M. Bruun3, and Anders S. Sørensen2,*

  • 1Institut für Theorie der Statistischen Physik, RWTH Aachen University, 52074 Aachen, Germany
  • 2Niels Bohr Institute, University of Copenhagen, 2100 København, Denmark
  • 3Institute of Physics and Astronomy, Aarhus University, 8000 Aarhus C, Denmark

  • *anders.sorensen@nbi.ku.dk

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 92, Iss. 6 — December 2015

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review A

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×