Single-site- and single-atom-resolved measurement of correlation functions |
| |
Authors: | M. Endres M. Cheneau T. Fukuhara C. Weitenberg P. Schauß C. Gross L. Mazza M. C. Bañuls L. Pollet I. Bloch S. Kuhr |
| |
Affiliation: | 1. Max-Planck-Institut für Quantenoptik, 85748, Garching, Germany 2. Laboratoire Kastler Brossel, CNRS, UPMC, Ecole Normale Supérieure, 75005, Paris, France 3. Scuola Normale Superiore, 56126, Pisa, Italy 4. Ludwig-Maximilians-Universit?t, 80799, Munich, Germany 5. Department of Physics, SUPA, University of Strathclyde, Glasgow, G4 0NG, UK
|
| |
Abstract: | Correlation functions play an important role for the theoretical and experimental characterization of many-body systems. In solid-state systems, they are usually determined through scattering experiments, whereas in cold gases systems, time-of-flight, and in situ absorption imaging are the standard observation techniques. However, none of these methods allow the in situ detection of spatially resolved correlation functions at the single-particle level. Here, we give a more detailed account of recent advances in the detection of correlation functions using in situ fluorescence imaging of ultracold bosonic atoms in an optical lattice. This method yields single-site- and single-atom-resolved images of the lattice gas in a single experimental run, thus gaining direct access to fluctuations in the many-body system. As a consequence, the detection of correlation functions between an arbitrary set of lattice sites is possible. This enables not only the detection of two-site correlation functions but also the evaluation of non-local correlations, which originate from an extended region of the system and are used for the characterization of quantum phases that do not possess (quasi-)long-range order in the traditional sense. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|