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PRODID:https://murmitoyen.com/events/vanille/udem/
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UID:69dc0761ce561
DTSTAMP:20260412T165809
DTSTART:20170324T113000
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URL:https://murmitoyen.com/events/vanille/udem/detail/738209-quantum-entang
 lement-strange-metals-and-black-holes-subir-sachdev-harvard-university
LOCATION:Pavillon Roger-Gaudry \, 2900\, boul. Édouard-Montpetit\, Local M
 -415\, Montréal\, QC\, Canada
SUMMARY:Quantum entanglement\, strange metals\, and black holes - Subir Sac
 hdev (Harvard University)
DESCRIPTION:Entanglement is a counterintuitive feature of quantum mechanics
 \, which implies that a measurement of one particle can instantaneously de
 termine the state of another well-separated particle. Remarkably\, quantum
  entanglement can also happen en masse\, and determines observable propert
 ies of macroscopic objects.  I will present a simple model of many-particl
 e entanglement\, which has led to new insights into two very different cla
 sses of systems. First\, we have crystals of materials containing layered
  arrangements of copper and oxygen atoms. At low temperatures\, these mate
 rials exhibit superconductivity\, the ability to conduct electricity with
 out resistance. But at higher temperatures they exhibit a “strange metal
 \,” which conducts electricity and heat in a novel manner linked to the
  collective quantum entanglement of the electrons. Second\, we have black 
 holes\, astrophysical objects so dense that even light cannot escape past
  a horizon. Hawking argued that quantum entanglement can be present across
  the horizon\, and this leads to radiation from the black hole. Remarkabl
 y\, the simple model of entanglement leads to a common description of the 
 physical properties of both classes of systems.
\nLa conférence est pour
  tout public et le café est servi dès 11h30.
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