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VERSION:2.0
PRODID:Icfo
X-PUBLISHED-TTL:P1W
BEGIN:VEVENT
UID:69df664383dad
DTSTART:20221117T130000Z
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20221117T140000Z
LOCATION:Blue Lecture Room
SUMMARY:ICFO | PAUL ERKER
CLASS:PUBLIC
DESCRIPTION:Abstract: \nAll clocks\, in some form or another\, use the evol
 ution of nature towards higher entropy states to quantify the passage of t
 ime. Due to the statistical nature of the second law and corresponding ent
 ropy flows\, fluctuations fundamentally limit the performance of any clock
 . This suggests a deep relation between the increase in entropy and the qu
 ality of clock ticks. Indeed\, minimal models for autonomous clocks in the
  quantum realm revealed that a linear relation can be derived\, where for 
 a limited regime every bit of entropy linearly increases the accuracy of q
 uantum clocks. But can such a linear relation persist as we move towards a
  more classical system? We answer this in the affirmative by presenting th
 e first experimental investigation of this thermodynamic relation in a nan
 oscale clock. We stochastically drive a nanometer-thick membrane and read 
 out its displacement with a radio-frequency cavity\, allowing us to identi
 fy the ticks of a clock. We show theoretically that the maximum possible a
 ccuracy for this classical clock is proportional to the entropy created pe
 r tick\, similar to the known limit for a weakly coupled quantum clock but
  with a different proportionality constant. We measure both the accuracy a
 nd the entropy. Once non-thermal noise is accounted for\, we find that the
 re is a linear relation between accuracy and entropy and that the clock op
 erates within an order of magnitude of the theoretical bound.
DTSTAMP:20260415T101947Z
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