Interferometric Probes of Many-Body Localization

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Interferometric Probes of Many-Body Localization

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Title: Interferometric Probes of Many-Body Localization
Author: Serbyn, M.; Knap, Michael; Gopalakrishnan, Sarang; Papić, Z.; Yao, Norman Ying; Laumann, C. R.; Abanin, Dmitry; Lukin, Mikhail D.; Demler, Eugene A.

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Citation: Serbyn, M., M. Knap, S. Gopalakrishnan, Z. Papić, N. Y. Yao, C. R. Laumann, D. A. Abanin, M. D. Lukin, and E. A. Demler. 2014. “Interferometric Probes of Many-Body Localization.” Physical Review Letters 113 (14) (October). doi:10.1103/physrevlett.113.147204.
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Abstract: We propose a method for detecting many-body localization (MBL) in disordered spin systems. The method involves pulsed coherent spin manipulations that probe the dephasing of a given spin due to its entanglement with a set of distant spins. It allows one to distinguish the MBL phase from a noninteracting localized phase and a delocalized phase. In particular, we show that for a properly chosen pulse sequence the MBL phase exhibits a characteristic power-law decay reflecting its slow growth of entanglement. We find that this power-law decay is robust with respect to thermal and disorder averaging, provide numerical simulations supporting our results, and discuss possible experimental realizations in solid-state and cold-atom systems.
Published Version: doi:10.1103/PhysRevLett.113.147204
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