Antiferromagnetic noise correlations in optical lattices

Georg Morten Bruun, Niels Bohr International Academy, University of Copenhagen, DK-2100 Copenhagen Ø, Denmark; F. T. Syljuåsen; K. G. L. Pedersen; Brian Møller Andersen; E. Demler; Anders Søndberg Sørensen

doi:10.1103/PhysRevA.80.033622

Antiferromagnetic noise correlations in optical lattices

Georg Morten Bruun, Niels Bohr International Academy, University of Copenhagen, DK-2100 Copenhagen Ø, Denmark, F. T. Syljuåsen, K. G. L. Pedersen, Brian Møller Andersen, E. Demler, Anders Søndberg Sørensen

14 Citations (Scopus)

Abstract

Weanalyze how noise correlations probed by time-of-flight experiments reveal antiferromagnetic(AF) correlations of fermionic atoms in two-dimensional and three-dimensional opticallattices. Combining analytical and quantum Monte Carlo calculations using experimentallyrealistic parameters, we show that AF correlations can be detectedfor temperatures above and below the critical temperature for AFordering. It is demonstrated that spin-resolved noise correlations yield importantinformation about the spin ordering. Finally, we show how toextract the spin correlation length and the related critical exponentof the AF transition from the noise
Udgivelsesdato: September 18

Original language	English
Journal	Physical Review A (Atomic, Molecular and Optical Physics)
Volume	80
Issue number	3
Pages (from-to)	033622
Number of pages	5
ISSN	2469-9926
DOIs	https://doi.org/10.1103/PhysRevA.80.033622
Publication status	Published - 23 Sept 2009

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10.1103/PhysRevA.80.033622

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Bruun, Niels Bohr International Academy, University of Copenhagen, DK-2100 Copenhagen Ø, Denmark, G. M., Syljuåsen, F. T., Pedersen, K. G. L., Andersen, B. M., Demler, E., & Sørensen, A. S. (2009). Antiferromagnetic noise correlations in optical lattices. Physical Review A (Atomic, Molecular and Optical Physics), 80(3), 033622. https://doi.org/10.1103/PhysRevA.80.033622

Antiferromagnetic noise correlations in optical lattices. / Bruun, Niels Bohr International Academy, University of Copenhagen, DK-2100 Copenhagen Ø, Denmark, Georg Morten; Syljuåsen, F. T.; Pedersen, K. G. L. et al.
In: Physical Review A (Atomic, Molecular and Optical Physics), Vol. 80, No. 3, 23.09.2009, p. 033622.

Research output: Contribution to journal › Journal article › Research › peer-review

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AU - Bruun, Niels Bohr International Academy, University of Copenhagen, DK-2100 Copenhagen Ø, Denmark, Georg Morten

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AU - Pedersen, K. G. L.

AU - Andersen, Brian Møller

AU - Demler, E.

AU - Sørensen, Anders Søndberg

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AB - 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 Udgivelsesdato: September 18

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DO - 10.1103/PhysRevA.80.033622

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