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SUMMARY:物理・第33回NITEP談話会
DTSTART;VALUE=DATE-TIME:20230613T070000Z
DTEND;VALUE=DATE-TIME:20230613T090000Z
DTSTAMP;VALUE=DATE-TIME:20260818T164200Z
UID:indico-event-129@indico.nitep.omu.ac.jp
DESCRIPTION:Speaker: Dr. Eloisa Cuestas (Okinawa Institute of Science and 
 Technology)\n\nTitle: "Making statistics work: a quantum engine in the BEC
 -BCS crossover"\n\nDate & Time: June 13 (Tue.) 16:00~\n\nPlace: F205 (Facu
 lty of Science\, Osaka Metropolitan Univ.\, Sugimoto Campus)\n\nAbstract:\
 nWe present a new class of many-body quantum engine that we termed Pauli e
 ngine. Our engine exploits genuine nonclassical forms of energy different 
 from heat\, which have not been used until now for work production in cycl
 ic engines. In the Pauli engine the energy input is not related to the tem
 perature of an external bath\, instead\, our machine is fueled by the ener
 gy associated with the change of the statistical behavior of the working m
 edium from bosonic to fermionic and back. This mechanism is of purely quan
 tum origin and has no correlate in the classical regime. Since the change 
 in quantum statistic does not require the coupling to a hot or cold reserv
 oir\, the main advantage of the Pauli engine is that it is free of the dis
 sipation processes of conventional engines. We experimentally realized the
  Pauli cycle by driving a trapped ultracold two-component Fermi gas of Li 
 atoms between a Bose-Einstein condensate of bosonic molecules and a unitar
 y Fermi gas. Such experiments result in a work output of several 10^6 vibr
 ational quanta per cycle with an efficiency of up to 25%. Our findings est
 ablish quantum statistics as a useful thermodynamic resource for work prod
 uction in a new class of emergent quantum engines.\n\n\nReference:\nJ. Koc
 h\, K. Menon\, E. Cuestas\, S. Barbosa\, E. Lutz\, T. Fogarty\, Th. Busch\
 , and  A. Widera\narXiv:2209.14202 (2022)\n\nSubject keywords:\nQuantum E
 ngines / Quantum Statistics / Ultracold Atoms /  BEC-BCS Crossover\n\nhtt
 ps://indico.nitep.osaka-cu.ac.jp/event/129/
LOCATION:
URL:https://indico.nitep.osaka-cu.ac.jp/event/129/
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