Quantum Noise Analysis of Spin Systems Realized with Cold Atoms
arXiv:cond-mat/0609748 · doi:10.1088/1367-2630/9/1/007
Abstract
We consider the use of quantum noise to characterize many-body states of spin systems realized with ultracold atomic systems. These systems offer a wealth of experimental techniques for realizing strongly interacting many-body states in a regime with a large but not macroscropic number of atoms where fluctuations of an observable such as the magnetization are discernable compared to the mean value. The full distribution function is experimentally relevant and encodes high order correlation functions that may distinguish various many-body states. We apply quantum noise analysis to the Ising model in a transverse field and find a distinctive even versus odd splitting in the distribution function for the transverse magnetization that distinguishes between the ordered, critical, and disordered phases. We also discuss experimental issues relevant for applying quantum noise analysis for general spin systems and the specific results obtained for the Ising model.
18 pages, 4 figures, updated acknowledgements
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Cited by in corpus (5)
- Order parameter statistics in the critical quantum Ising chain
- Probing spatial spin correlations of ultracold gases by quantum noise spectroscopy
- Ultracold atomic Bose and Fermi spinor gases in optical lattices
- Quantum imaging of spin states in optical lattices
- Fermion- and Spin-Counting in Strongly Correlated Systems