Journal
SCIENCE
Volume 334, Issue 6053, Pages 200-203Publisher
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1209284
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Funding
- Max-Planck-Gesellschaft
- Deutsche Forschungsgemeinschaft
- European Union
- Japan Society for Promotion of Science
- Swiss National Science Foundation [PZ00P2-131892/1]
- Swiss National Science Foundation (SNF) [PZ00P2_131892] Funding Source: Swiss National Science Foundation (SNF)
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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.
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