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SUMMARY:Coherence and measurement in quantum thermodynamics - Janet Anders
  (University of Exeter)
DTSTART:20151113T120000Z
DTEND:20151113T130000Z
UID:TALK61935@talks.cam.ac.uk
CONTACT:William Matthews
DESCRIPTION:The link between classical information theory and thermodynami
 cs was established by Landauer half a century ago. In this talk we describ
 e a prototypical quantum information processing task that mirrors Landauer
 ’s erasure and has an associated thermodynamic heat and work. We show th
 at when implementing this process it is possible to draw positive mean wor
 k from quantum coherences while there is no such contribution in classical
  thermodynamics [1]. The achievability of this maximum work is exemplified
  for spin 1/2 particles that undergo a sequence of quantum thermodynamic s
 teps\, i.e. the system follows a discrete quantum trajectory [2]. The resu
 lts are discussed in the context of Maxwell’s demon\, quantum work fluct
 uation relations [3] and single-shot approaches [4]\, uncovering a new per
 spective on the role of coherences in quantum thermodynamics. \n\n[1] Kamm
 erlander\, Anders\, arxiv1502.02673 (2015)\n[2] Anders\, Giovanetti\, N. J
 . Phys.\, 15\, 033022 (2013)\n[3] Talkner\, Lutz\, Hänggi\, Phys. Rev. E 
 75\, 050102 (2007)\n[4] Horodecki\, Oppenheim\, Nature Comm. 4\, 2059 (201
 3)
LOCATION:MR14\, Centre for Mathematical Sciences\, Wilberforce Road\, Camb
 ridge
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