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SUMMARY:Backaction of quantum measurements in superconducting circuits
DTSTART:20170728T151500
DTSTAMP:20260405T152642Z
UID:b8e9e3e509a2d8735232e1777f45c659c785770e8fe619495a8989bb
CATEGORIES:Conferences - Seminars
DESCRIPTION:Benjamin Huard Laboratoire de Physique\, Ecole Normale Supéri
 eure de Lyon\nWhen a quantum system is measured\, it collapses onto a stat
 e that corresponds to the measurement outcome. This measurement backaction
  takes subtle forms if the system first interacts with an ancillary quantu
 m system\, which is then measured. Observing these phenomena requires dete
 ctors\, which are able to extract most of the information leaking out of a
  quantum system. Superconducting circuits now offer a testbed for these qu
 estions. In this talk\, I will show how quantum measurement backaction can
  be observed in circuit quantum electrodynamics (c-QED) experiments. It wi
 ll be shown that it is possible to follow a quantum state under a weak con
 tinuous measurement and use it to realize feedback.\n \n \n\nReferences:
 \n\n\nQuantum dynamics of an electromagnetic mode that cannot contain N ph
 otons\n\nL Bretheau\, et al. - Science\, 2015\n\n\n\nObserving quantum sta
 te diffusion by heterodyne detection of fluorescence\n\nP Campagne-et al. 
 Physical Review X\, 2016\n
LOCATION:CE 1 5 https://plan.epfl.ch/?room==CE%201%205
STATUS:CONFIRMED
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