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DTSTAMP:20260917T063310Z
LAST-MODIFIED:20140505T161002Z
DTSTART:20140507T150000Z
DTEND:20140507T160000Z
UID:event1261@bu.edu
URL:http://physics.bu.edu/internal/events/show/1261
SUMMARY:How to probe many-body localized phase? 
DESCRIPTION:Featuring Maksym Serbyn\, MIT\nHosted by: Claudio Chamon\n\nPar
	t of the Condensed Matter Theory Seminar Series.\n\nAbstract: Recently it w
	as demonstrated that the many-body localized phase can be characterized by 
	the existence of infinitely many local conservation laws. These local integ
	rals of motion can be viewed as effective quantum spins that have conserved
	 z-components. This picture shows that the dynamics of the many-body locali
	zed phase is limited to dephasing between distant effective spins. Slow log
	arithmic entanglement growth for initial product states is one signature of
	 the restricted dynamics of the many-body localized phase. However\, the en
	tanglement entropy is difficult to observe experimentally.\n\nIn this talk\
	, after reviewing the description of the MBL phase in terms of conserved qu
	antities [1]\, we explore experimentally observable consequences of dynamic
	s in the MBL phase.  We argue that a characteristic slow power-law decay of
	 local observables is a signature of the MBL phase that is measurable exper
	imentally. In particular\, we propose a specific protocol to probe the deph
	asing of a given spin due to its entanglement with a set of distant spins [
	2]. The proposed response function exhibits a power-law decay that is robus
	t with respect to thermal and disorder averaging. We also briefly discuss t
	he quench dynamics and spectral functions of local operators. We will discu
	ss numerical simulations supporting our results.\n\n[1] M. Serbyn\, Z. Papi
	c\, D. A. Abanin\, Phys. Rev. Lett. 111\, 127201 (2013).\n[2] M. Serbyn et.
	 al.\, arXiv:1403.0693.
LOCATION:SCI 328\, 590 Commonwealth Avenue\, 02215
STATUS:CONFIRMED
CLASS:PUBLIC
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