Many-body localization in optical lattices: News from the experiment

Event Dates: 

Monday, January 23, 2017 - 10:30am

CTQM Seminar Type: 

  • CTQM Seminar

Seminar Location: 

  • Duane Physics Room G126

Speaker Name(s): 

Ulrich Schneider

Speaker Affiliation(s): 

Cambridge University

Abstract, Event Details: 

Following any kind of perturbation or quantum quench, closed interacting many-body systems will typically relax back to thermal equilibrium. This relaxation effectively deletes any initial quantum information about the states, as all local degrees of freedom become fully entangled with the rest of the system. During recent years, however, many-body localized systems (MBL) have emerged as an exciting alternative. These systems, in which an external disorder localizes all particles despite their interactions, opens the door to observe quantum effects over unprecedented timescales, since thermalization and the associated loss of accessible quantum information is absent.

I will discuss our recent experiments on studying MBL using fermionic atoms in 1D optical lattices, ranging from the initial observation over the effects of photon scattering, periodic modulations and couplings between localized systems to our latest observation of Griffiths-type slow relaxation dynamics close to the transition.