Entanglement and Quantum Information in the Presence of Dispersive Media
Jul 18, 2013
from 03:30 PM to 04:30 PM
|Where||Engr. IV Bldg., Tesla Room 53-125|
|Contact Name||Prof. Aydogan Ozcan|
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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.