Observation of correlated particle-hole pairs and string order in low-dimensional Mott insulators |
| |
Authors: | Endres M Cheneau M Fukuhara T Weitenberg C Schauss P Gross C Mazza L Bañuls M C Pollet L Bloch I Kuhr S |
| |
Institution: | Max-Planck-Institut für Quantenoptik, Garching, Germany. manuel.endres@mpq.mpg.de |
| |
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. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|