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Observation of correlated particle-hole pairs and string order in low-dimensional Mott insulators.
- Source :
-
Science (New York, N.Y.) [Science] 2011 Oct 14; Vol. 334 (6053), pp. 200-3. - Publication Year :
- 2011
-
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.
Details
- Language :
- English
- ISSN :
- 1095-9203
- Volume :
- 334
- Issue :
- 6053
- Database :
- MEDLINE
- Journal :
- Science (New York, N.Y.)
- Publication Type :
- Academic Journal
- Accession number :
- 21998381
- Full Text :
- https://doi.org/10.1126/science.1209284