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Probing Real-Space and Time-Resolved Correlation Functions with Many-Body Ramsey Interferometry
Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA;ITAMP, Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA.
DPMC-MaNEP, University of Geneva, 24 Quai Ernest-Ansermet CH-1211 Geneva, Switzerland.
DPMC-MaNEP, University of Geneva, 24 Quai Ernest-Ansermet CH-1211 Geneva, Switzerland.
Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Straße 1, 85748 Garching, Germany;Fakultät für Physik, Ludwig-Maximilians-Universität München, 80799 München, Germany.
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2013 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 111, no 14Article in journal (Refereed) Published
Abstract [en]

We propose to use Ramsey interferometry and single-site addressability, available in synthetic matter such as cold atoms or trapped ions, to measure real-space and time-resolved spin correlation functions. These correlation functions directly probe the excitations of the system, which makes it possible to characterize the underlying many-body states. Moreover, they contain valuable information about phase transitions where they exhibit scale invariance. We also discuss experimental imperfections and show that a spin-echo protocol can be used to cancel slow fluctuations in the magnetic field. We explicitly consider examples of the two-dimensional, antiferromagnetic Heisenberg model and the one-dimensional, long-range transverse field Ising model to illustrate the technique.

Place, publisher, year, edition, pages
American Physical Society , 2013. Vol. 111, no 14
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:uu:diva-336273DOI: 10.1103/PhysRevLett.111.147205OAI: oai:DiVA.org:uu-336273DiVA, id: diva2:1165560
Available from: 2017-12-13 Created: 2017-12-13 Last updated: 2017-12-13

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