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SUMMARY:Single photon state characterization for quantum technologies - La
 ura Wright (University of Oxford)
DTSTART:20131025T100000Z
DTEND:20131025T113000Z
UID:TALK48516@talks.cam.ac.uk
CONTACT:6270
DESCRIPTION:There is universal interest in pursuing the development of Qua
 ntum Technologies. They promise to\ntransform information technologies bey
 ond our capabilities using classical resources\, for example with\nenhance
 d precision in measurement\, secure communications and high speed computat
 ion.\nQuantum states of light are ideal candidates as the information carr
 iers for these technologies. The\nability to create\, coherently manipulat
 e\, and detect these states of light also underpins both classical\nand qu
 antum knowledge and its application.\nSpecifically\, encoding and transfer
 ring information in the time-frequency domain is a natural extension\nto c
 urrent classical communications. It allows large dimensional encoding and 
 high fidelity transfer\nover existing optical networks. Furthermore\, the 
 ability to completely characterize the time-frequency\nstate of light at t
 he single-photon level will have direct impact in fields where low-light s
 ensing is\nnecessary.\nHere we present a toolbox of resource efficient met
 hods to characterize single photons by\ninvestigating their purity and fid
 elity. The complete state is yet to be measured in the time-frequency\ndom
 ain\, thus we also introduce a novel full state tomography technique using
  electro-optical shearing\ninterferometry.
LOCATION:Rutherford building\, Seminar Room B
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