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SUMMARY:"Photon-Atom gates " \, part of Condensed Matter and Quantum Scien
 ce seminar
DTSTART:20190614T151500
DTEND:20190614T164500
DTSTAMP:20260429T182825Z
UID:947f287a9861b97554fae47bb388d9c5059e21ad36712d90cd5d833f
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof Barak DAYAN\, Head of the Quantum Optics group at the Wei
 zmann Institute\, focusing on deterministic photon-atom and photon-photon 
 interactions and gates by fibre-based single-atom cavity-QED.\nAbstract\nD
 eterministic quantum gates between single photons and single quantum emitt
 ers are a valuable building block for the distribution of quantum informat
 ion between remote systems\, as well as for the construction of valuable p
 hotonic states. I will review the tools cavity-QED provides for the constr
 uction of such gates\, and present our recent demonstration of a photon-at
 om swap gate [1]. The underlying mechanism is single-photon Raman interact
 ion (SPRINT) - an interference-based effect in which a photonic qubit dete
 rministically controls the state of a material qubit and vice versa [2-4].
  This open-system scheme is applicable to any waveguide-coupled Lambda sys
 tem (it has been also demonstrated in microwave with superconducting qubit
 s [5-6]) and can serve as a basis for a variety of other photon-"atom" int
 eractions - from universal gates\, through QND measurement\, to the prepar
 ations of nonclassical states of light such as single-photon subtracted or
  added states\, CAT states\, and cluster states for one-way photonic quant
 um computation.\n \n[1] Nature Physics 14\, 996 (2018)\n[2] Science 345\,
  903 (2014)\n[3] Nature Photonics 10\, 19 (2016)\n[4] Phys. Rev. A 95\, 03
 33814 (2017)\n[5] Phys. Rev. Lett. 113\, 0636104 (2014)\n[6] Nature Commun
 ications 7\, 1 (2016)\n 
LOCATION:BS 270 https://plan.epfl.ch/?room=BS270
STATUS:CONFIRMED
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