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SUMMARY:Quantum-enhanced measurement of magnetic fields - Morgan Mitchell 
 (ICFO)
DTSTART:20120305T150000Z
DTEND:20120305T160000Z
UID:TALK36248@talks.cam.ac.uk
CONTACT:6270
DESCRIPTION:Controlled interaction between single atoms and single photons
  is a key \ntool in quantum networking\, required to implement\, for examp
 le\, a \nquantum repeater. I will describe recent experiments where single
  \ntrapped ions emit single-mode coupled\, bandwidth-tunable single photon
 s \nat high rate\, and where single ions interact with single photons from
  a \nSPDC photon pair source. In the latter experiment\, absorption of a \
 nsingle photon is signaled by a quantum jump in the ion\, while it is \nhe
 ralded by the photon's entangled partner [1]. Entanglement is \npreserved 
 in the heralded absorption process.\n[1]  N. Piro et al.\, Nature Physics 
 7\, 17 (2011).\n
LOCATION:Rutherford building\, Seminar Room B
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