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SUMMARY:Realistic quantum-enhanced phase estimation - Konrad Banaszek
DTSTART:20090209T120000Z
DTEND:20090209T130000Z
UID:TALK16981@talks.cam.ac.uk
CONTACT:Lawrence Ioannou
DESCRIPTION:It is widely recognized that the use of nonclassical states of
  light allows one to overcome the shot-noise limit in precision phase meas
 urements. The enhancement comes from exploiting inherently quantum feature
 s\, such as entanglement\, that are sensitive to decoherence mechanisms pr
 esent in realistic measurements. In this talk we present designs for quant
 um-enhanced phase sensing that are robust to experimental imperfections\, 
 such as photon loss. The ultimate precision of such schemes exceeds the sh
 ot-noise limit\, but is inevitably worse than the ultimate quantum mechani
 cal Heisenberg limit for the decoherence-free scenario.\n
LOCATION:MR10\, Centre for Mathematical Sciences
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