BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//CERN//INDICO//EN
BEGIN:VEVENT
SUMMARY:Violation of kinetic uncertainty relation in maser heat engines: R
 ole of spontaneous emission
DTSTART:20261012T133000Z
DTEND:20261012T153000Z
DTSTAMP:20261024T032000Z
UID:indico-event-9873@indico.fysik.su.se
DESCRIPTION:Speakers: Varinder Singh (Korea Institute for Advanced Study)\
 n\nWe investigate the kinetic uncertainty relation (KUR)—a fundamental t
 rade-off between dynamical activity and current fluctuations—in two conf
 igurations of a maser heat engine. We find that KUR violations arise only 
 in one model. This asymmetry originates from spontaneous emission\, which 
 breaks the structural symmetry between the configurations and modifies the
 ir coherence dynamics. While we analyze several contributing factors\, inc
 luding statistical signatures such as the Fano factor and the ratio of dyn
 amical activity to current\, our results show that the decisive mechanism 
 is the slower decoherence in one configuration\, which enables quantum vio
 lations of the classical steady-state KUR bound. By contrast\, the faster 
 coherence decay in the other configuration suppresses such violations\, dr
 iving it closer to classical behavior. These findings highlight the critic
 al role of decoherence mechanisms in determining fundamental thermodynamic
  bounds and provide insights for the design of quantum heat engines in whi
 ch the control of decoherence is central to suppressing fluctuations and e
 nhancing reliable performance.\n\nhttps://indico.fysik.su.se/event/9873/
LOCATION:Albano Building 3
URL:https://indico.fysik.su.se/event/9873/
END:VEVENT
END:VCALENDAR