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BEGIN:VEVENT
DTSTART:20230530T200000Z
UID:173410@events.unl.edu
DTSTAMP:20230530T154929Z
ORGANIZER;CN=Physics Department:MAILTO:paoffice2@unl.edu
SUMMARY:Quantum Nature of Coherent States
STATUS:CONFIRMED
DESCRIPTION:Dr. Moslem Mahdavifar will present his topic\, “Quantum Natur
e of Coherent States” for an AMO seminar. \n\nAbstract\: Using quasi-cla
ssical (coherent) states from a continuous wave (CW) source\, we have been
able to observe pure quantum mechanical effects. Our approach is based on
the uniform randomization of the temporal phase of these states in an int
erferometric setting. We call such states as Phased Randomized Coherent St
ates (PRCSs). First\, we experimentally realized two-photon bunching and i
ts complementary Hong-Ou-Mandel (HOM) effect. Then\, after this quantum si
gnature\, we extend the idea to probe the Bell inequality. We successfully
observed the violation of CHSH form of the inequality and hence confirmed
the existence of entanglement through our approach. In these works\, the
only degree of freedom involved was polarization. However\, we aimed after
wards to add orbital angular momentum (OAM) to this toolbox and examine if
we can transfer quantum information using OAM through coherent states fro
m a CW source. Once again\, this method correctly matched with theoretical
predictions resulting in two-photon bunching experimentally. Therefore\,
we believe that quasi-classical states can be utilized to a more diverse s
et of experiments in the domain of quantum optics and quantum information.
One main benefit of these states is their photon rate. They do not have a
ny shortage in photon numbers\, and thus they do not face scalability prob
lem as much as the other single-photon sources do.
LOCATION:Jorgensen Hall Room 145
URL://events.unl.edu/physics/2023/05/30/173410/
DTEND:20230530T213000Z
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