CaltechAUTHORS
Published October 14, 2011 | Version Submitted
Journal Article Open

Observation of Correlated Particle-Hole Pairs and String Order in Low-Dimensional Mott Insulators

Creators

  • 1. ROR icon Max Planck Institute of Quantum Optics
  • 2. ROR icon ETH Zurich
  • 3. ROR icon Ludwig-Maximilians-Universität München
  • 4. ROR icon University of Strathclyde

Abstract

Quantum phases of matter are characterized by the underlying correlations of the many-body system. Although this is typically captured by a local order parameter, it has been shown that a broad class of many-body systems possesses a hidden nonlocal order. In the case of bosonic Mott insulators, the ground state properties are governed by quantum fluctuations in the form of correlated particle-hole pairs that lead to the emergence of a nonlocal string order in one dimension. By using high-resolution imaging of low-dimensional quantum gases in an optical lattice, we directly detect these pairs with single-site and single-particle sensitivity and observe string order in the one-dimensional case.

Additional Information

© 2011 American Association for the Advancement of Science. 2 June 2011; accepted 15 August 2011. We acknowledge helpful discussions with E. Altman, E. Dalla Torre, M. Rizzi, and I. Cirac. This work was supported by Max-Planck-Gesellschaft, Deutsche Forschungsgemeinschaft, European Union (NAMEQUAM, AQUTE, and Marie Curie Fellowship to M.C.), and Japan Society for Promotion of Science (Postdoctoral Fellowship for Research Abroad to T.F.). L.P. is supported by the Swiss National Science Foundation under grant PZ00P2-131892/1. DMRG simulations were performed with use of code released within the PwP project (www.qti.sns.it). QMC calculations were performed on the Brutus cluster at ETH Zurich.

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Submitted - 1108.3317v1.pdf

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Additional details

Identifiers

Eprint ID
67451
Resolver ID
CaltechAUTHORS:20160527-111401113

Related works

Describes
http://arxiv.org/abs/1108.3317 (URL)

Funding

Max-Planck-Gesellschaft
Deutsche Forschungsgemeinschaft (DFG)
European Research Council (ERC)
Marie Curie Fellowship
Japan Society for the Promotion of Science (JSPS)
Swiss National Science Foundation (SNSF)
PZ00P2-131892/1

Dates

Created
2016-05-27
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Updated
2021-11-11
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