Interferometric probes of many-body localization
  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. 
M. Serbyn, M. Knap, S. Gopalakrishnan, Z. Papi\'c, N. Y. Yao, C. R.   Laumann, D. A. Abanin, M. D. Lukin, E. A. Demler
cond-mat.dis-nn cond-mat.quant-gas cond-mat.stat-mech