Condensed Matter Theory Forum - Deterministic fast scramblers with cold atoms

The possibility to study coherent many-body quantum dynamics in quantum simulators has motivated connections with several branches of theoretical physics. One distinctive feature in atomic physics is the ability to engineer long-range interactions between the constituent particles. I will discuss how this motivates a class of deterministic fast scramblers, Hamiltonian models or Floquet maps which dynamically generate entanglement on a timescale that grows only logarithmically with the system size. In contrast, previous discussions of fast scramblers in condensed matter were mostly based on disordered models, including random quantum circuits, or the SYK model. These deterministic models could be realised in present experiments, and open new opportunities to demonstrate many-body teleportation, generate useful entanglement, and to draw connections with other applications ranging from quantum error correcting codes to holography in AdS-CFT.  I will also touch on the interplay between these fast scramblers and local measurements, leading to a particular class of measurement-induced phase transitions.

If you would like to attend this meeting online, a Zoom link will be available. Please contact Max McGinley [maximilian.mcginley@physics.ox.ac.uk] for details.