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SUMMARY:Giulia Rubino (Bristol)
DTSTART:20211216T160000Z
DTEND:20211216T180000Z
DTSTAMP:20260423T011102Z
UID:QMFNoT/26
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/QMFNoT/26/">
 Quantum superposition of thermodynamic evolutions with opposing time's arr
 ows</a>\nby Giulia Rubino (Bristol) as part of QM Foundations & Nature of 
 Time seminar\n\n\nAbstract\nMicroscopic physical laws are time-symmetric\,
  hence\, a priori there exists no preferential temporal direction. However
 \, the second law of thermodynamics allows one to associate the "forward''
  temporal direction to a positive variation of the total entropy produced 
 in a thermodynamic process\, and a negative variation with its "time-rever
 sal'' counterpart. This definition of a temporal axis is normally consider
 ed to apply in both classical and quantum contexts. Yet\, quantum physics 
 admits also superpositions between forward and time-reversal processes\, w
 hereby the thermodynamic arrow of time becomes quantum-mechanically undefi
 ned. In this talk\, I will show that a definite thermodynamic time's arrow
  can be restored by a quantum measurement of entropy production\, which ef
 fectively projects such superpositions onto the forward (time-reversal) ti
 me-direction when large positive (negative) values are measured. Remarkabl
 y\, for small values (of the order of plus or minus one)\, the amplitudes 
 of forward and time-reversal processes can interfere\, giving rise to entr
 opy-production distributions featuring a more or less reversible process t
 han either of the two components individually\, or any classical mixture t
 hereof.\n
LOCATION:https://researchseminars.org/talk/QMFNoT/26/
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