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SUMMARY:Measurable signatures of quantum chaos and patterns of volume-law 
 entanglement in quantum dynamics - Sagar Vijay\, UC Santa Barbara
DTSTART:20201203T170000Z
DTEND:20201203T180000Z
UID:TALK153715@talks.cam.ac.uk
CONTACT:Jan Behrends
DESCRIPTION:The dynamics of a quantum system will often lead to the rapid 
 generation of entanglement and the loss of locally-accessible information 
 about an initial state. The highly-entangled states that form during these
  dynamics\, however\, can be distinct from a random pure state\, though me
 asurable diagnostics of these differences are often elusive. In this talk\
 , I will focus on progress in understanding signatures of these difference
 s in two settings. First\, I will discuss how the quantum butterfly effect
  can be identified in time-ordered correlations in quantum many-body syste
 ms in one spatial dimension. Second\, I will discuss universal properties 
 of a new kind of volume-law entangled phase that arises in the steady-stat
 e of monitored quantum dynamics\, and how this phase acts as an emergent q
 uantum error-correcting code. These results are obtained through toy model
 s in which these dynamics are possible to study exactly\, leading to usefu
 l heuristic pictures for entanglement manipulation in quantum many-body sy
 stems.
LOCATION:Details of video conferencing will be distributed nearer the time
 .
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