Measuring spin correlations in optical lattices using superlattice potentials

Kim Georg Lind Pedersen; Brian Møller Andersen; Georg Morten Bruun; Olav Fredrik Syljuåsen; Anders Søndberg Sørensen

doi:10.1103/PhysRevA.84.041603

Measuring spin correlations in optical lattices using superlattice potentials

Kim Georg Lind Pedersen, Brian Møller Andersen, Georg Morten Bruun, Olav Fredrik Syljuåsen, Anders Søndberg Sørensen

5 Citations (Scopus)

Abstract

We suggest two experimental methods for probing both short- and long-range spin correlations of atoms in optical lattices using superlattice potentials. The first method involves an adiabatic doubling of the periodicity of the underlying lattice to probe neighboring singlet (triplet) correlations for fermions (bosons) by the occupation of the resulting vibrational ground state. The second method utilizes a time-dependent superlattice potential to generate spin-dependent transport by any number of prescribed lattice sites, and probes correlations by the resulting number of doubly occupied sites. For experimentally relevant parameters, we demonstrate how both methods yield large signatures of antiferromagnetic correlations of strongly repulsive fermionic atoms in a single shot of the experiment. Lastly, we show how this method may also be applied to probe d-wave pairing, a possible ground-state candidate for the doped repulsive Hubbard model.

Original language	English
Journal	Physical Review A (Atomic, Molecular and Optical Physics)
Volume	84
Issue number	4
Pages (from-to)	041603
Number of pages	4
ISSN	2469-9926
DOIs	https://doi.org/10.1103/PhysRevA.84.041603
Publication status	Published - 11 Oct 2011

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10.1103/PhysRevA.84.041603

http://link.aps.org/doi/10.1103/PhysRevA.84.041603

Cite this

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title = "Measuring spin correlations in optical lattices using superlattice potentials",

abstract = "We suggest two experimental methods for probing both short- and long-range spin correlations of atoms in optical lattices using superlattice potentials. The first method involves an adiabatic doubling of the periodicity of the underlying lattice to probe neighboring singlet (triplet) correlations for fermions (bosons) by the occupation of the resulting vibrational ground state. The second method utilizes a time-dependent superlattice potential to generate spin-dependent transport by any number of prescribed lattice sites, and probes correlations by the resulting number of doubly occupied sites. For experimentally relevant parameters, we demonstrate how both methods yield large signatures of antiferromagnetic correlations of strongly repulsive fermionic atoms in a single shot of the experiment. Lastly, we show how this method may also be applied to probe d-wave pairing, a possible ground-state candidate for the doped repulsive Hubbard model.",

author = "Pedersen, {Kim Georg Lind} and Andersen, {Brian M{\o}ller} and Bruun, {Georg Morten} and Sylju{\aa}sen, {Olav Fredrik} and S{\o}rensen, {Anders S{\o}ndberg}",

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T1 - Measuring spin correlations in optical lattices using superlattice potentials

AU - Pedersen, Kim Georg Lind

AU - Andersen, Brian Møller

AU - Bruun, Georg Morten

AU - Syljuåsen, Olav Fredrik

AU - Sørensen, Anders Søndberg

PY - 2011/10/11

Y1 - 2011/10/11

N2 - We suggest two experimental methods for probing both short- and long-range spin correlations of atoms in optical lattices using superlattice potentials. The first method involves an adiabatic doubling of the periodicity of the underlying lattice to probe neighboring singlet (triplet) correlations for fermions (bosons) by the occupation of the resulting vibrational ground state. The second method utilizes a time-dependent superlattice potential to generate spin-dependent transport by any number of prescribed lattice sites, and probes correlations by the resulting number of doubly occupied sites. For experimentally relevant parameters, we demonstrate how both methods yield large signatures of antiferromagnetic correlations of strongly repulsive fermionic atoms in a single shot of the experiment. Lastly, we show how this method may also be applied to probe d-wave pairing, a possible ground-state candidate for the doped repulsive Hubbard model.

AB - We suggest two experimental methods for probing both short- and long-range spin correlations of atoms in optical lattices using superlattice potentials. The first method involves an adiabatic doubling of the periodicity of the underlying lattice to probe neighboring singlet (triplet) correlations for fermions (bosons) by the occupation of the resulting vibrational ground state. The second method utilizes a time-dependent superlattice potential to generate spin-dependent transport by any number of prescribed lattice sites, and probes correlations by the resulting number of doubly occupied sites. For experimentally relevant parameters, we demonstrate how both methods yield large signatures of antiferromagnetic correlations of strongly repulsive fermionic atoms in a single shot of the experiment. Lastly, we show how this method may also be applied to probe d-wave pairing, a possible ground-state candidate for the doped repulsive Hubbard model.

U2 - 10.1103/PhysRevA.84.041603

DO - 10.1103/PhysRevA.84.041603

M3 - Journal article

SN - 2469-9926

VL - 84

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JO - Physical Review A (Atomic, Molecular and Optical Physics)

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