BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Noncommuting conserved quantities in quantum many-body thermalizat
 ion - Nicole Yunger Halpern\, Harvard University
DTSTART:20200918T102000Z
DTEND:20200918T112000Z
UID:TALK151249@talks.cam.ac.uk
CONTACT:40340
DESCRIPTION:In statistical mechanics\, a small system exchanges conserved 
 quantities—heat\, particles\, electric charge\, etc.—with a bath. The 
 small system may thermalize to the canonical ensemble\, the grand canonica
 l ensemble\, etc. The conserved quantities are represented by operators us
 ually assumed to commute with each other. But noncommutation distinguishes
  quantum physics from classical. What if the operators fail to commute? I 
 will argue\, using quantum-information-theoretic thermodynamics\, that the
  small system thermalizes to near a “non-Abelian thermal state.” I wil
 l present a protocol for realizing this state experimentally\, supported w
 ith numerical simulations of a spin chain. The protocol is suited to ultra
 cold atoms\, trapped ions\, quantum dots\, and more. This work introduces 
 a nonclassical phenomenon—noncommutation of conserved quantities—into 
 a decades-old thermodynamics problem. \n\nReferences\n\n1) NYH\, Beverland
 \, and Kalev\, Phys. Rev. E 101\, 042117 (2020) https://dx.doi.org/10.1103
 /PhysRevE.101.042117 \n\n2) NYH\, Faist\, Oppenheim\, and Winter\, Nat. Co
 mms. 7\, 12051 (2016) https://www.nature.com/articles/ncomms12051\n\n3) NY
 H\, J. Phys. A 51\, 094001 (2018) https://iopscience.iop.org/article/10.10
 88/1751-8121/aaa62f/meta\n\nZoom Link\n\nPlease click the link below to jo
 in the webinar:\nhttps://us02web.zoom.us/j/86846521451?pwd=M0VUSE5wTEJwSnd
 CbEx0VUtqNHpuZz09\nPasscode: 226745\n
LOCATION:Virtually\, at Zoom
END:VEVENT
END:VCALENDAR