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arXiv · 1403.0693

Interferometric probes of many-body localization

M. Serbyn·M. Knap·S. Gopalakrishnan·Z. Papić·N. Y. Yao·C. R. Laumann·D. A. Abanin·M. D. Lukin·E. A. Demler
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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 non-interacting 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.

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M. Serbyn, M. Knap, S. Gopalakrishnan, Z. Papić, N. Y. Yao, C. R. Laumann, D. A. Abanin, M. D. Lukin, E. A. Demler. 2014-03-04. Interferometric probes of many-body localization. https://doi.org/10.1103/physrevlett.113.147204

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