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PRODID:UW-Madison-Physics-Events
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UID:UW-Physics-Event-3796
DTSTART:20151002T150000Z
DURATION:PT1H0M0S
DTSTAMP:20260417T100042Z
LAST-MODIFIED:20150917T150048Z
LOCATION:5310 Chamberlin Hall
SUMMARY:Advanced quantum communication using hyperentangled photons\, 
 Atomic Physics Seminar\, Trent Graham \, Urbana-Champaign
DESCRIPTION:Photons are the perfect "flying qubits" for quantum commun
 ication: they travel at the speed of light and have only weak nonlinea
 r interactions with their environment. While these features make photo
 ns ideal carriers of quantum information\, many quantum communication 
 protocols require qubits to interact in quantum logic gates. Although 
 interactions between individual photons are too weak for reliable mult
 i-qubit gates\, it is relatively easy to implement efficient gates bet
 ween different degrees of freedom encoded on the same photon. By using
  photons that are simultaneously entangled in multiple degrees of free
 dom ("hyperentangled") we can perform operations that are impossible f
 or single-qubit states\, as well as gain access to higher dimensional 
 entanglement. We demonstrate that hyperentangled states can be used fo
 r efficient quantum state communication\, increased classical channel 
 capacity\, and more efficient quantum channel characterization.
URL:https://www.physics.wisc.edu/events/?id=3796
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