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VERSION:2.0
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UID:6ae6b7e0255d7
DTSTART:20261110T110000Z
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20261110T120000Z
LOCATION:Seminar Room
SUMMARY:ICFO | ALBERTO ROLANDI
CLASS:PUBLIC
DESCRIPTION:The question of approaching the reversible limit with finite re
 ssources is one of the central problems in thermodynamics. In this work\, 
 we use the Planckian bound for thermalization to derive a universal non-tr
 ivial lower-bound to the entropy production of arbitrary physical processe
 s. We show that quantum mechanics imposes that the dissipation incurred by
  any operation is larger than L^2 \\tau_{\\rm Pl}/\\tau\, where \\tau_{\\r
 m Pl} = \\hbar/k_BT is the Planckian dissipation time\, L is a Fisher info
 rmation distance between the boundaries of the operation\, and \\tau is th
 e duration of the protocol. This result holds true for all quantum mechani
 cal systems where thermal states are fixed points of the evolution. Furthe
 rmore\, this bound implies a stronger version of the second law of thermod
 ynamics: the entropy production of any finite-time process cannot be broug
 ht arbitrarily close to zero unless it is in a critical state where its th
 ermal Fisher information can be arbitrarily small. Finally\, we can apply 
 this bound to obtain a universal finite-time correction to Landauer's prin
 ciple: erasing one bit of information requires to dissipate at least k_BT(
 ln(2) + \\frac{\\Gamma(3/4)^4}{\\pi}\\frac{\\tau_{\\rm Pl}}{\\tau}) heat i
 nto the environment.
DTSTAMP:20261101T035408Z
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