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Entanglement and Quantum Information in the Presence of Dispersive Media

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  • Visitor Seminars
When Jul 18, 2013
from 03:30 PM to 04:30 PM
Where Engr. IV Bldg., Tesla Room 53-125
Contact Name
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Ryan Glasser
National Institute of Standards and Technology

Entanglement has long been thought to play a vital role in quantum information and communication protocols.  Thus, much theoretical and experimental work has been done to investigate the fundamental properties of entanglement.  In this talk I will present recent experimental work investigating the behavior of entanglement and quantum mutual information upon propagation through dispersive media.  A four-wave mixing process in warm atomic vapor is used to both generate an entangled state of light, as well as produce a medium exhibiting slow- and fast-light properties.  Differences in the behavior of the entanglement and quantum information after propagating through such dispersive media will be highlighted.  I will also discuss how the system may be used to generate correlated pairs of random numbers applicable to quantum key distribution.  Finally, I will discuss how the experimental setup may be slightly altered to result in phase-sensitive amplification, and will show preliminary results investigating the dispersive properties of such an amplifier.

Ryan Glasser is currently a postdoctoral researcher at NIST and the Joint Quantum Institute at the University of Maryland.  He received his bachelor's degree from UCLA in physics in 2005, and a Ph.D. in physics from LSU in 2009.  From 2009-early 2011 he worked for Harris Corporation on the DARPA Quantum Sensors Program.  In early 2011 he was awarded a National Research Council associateship and began work at NIST. 

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