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Hugo Cable: TODAY2:00
June 9, 2008
Tech L324
Dr. Hugo Cable, Postdoctoral Researcher, Louisiana State University
"Managing Photonic Loss"
Due to inclement weather and flight delays, this event has been cancelled. | Due to inclement weather and flight delays, this event has been cancelled.
Abstract: For optical experiments at the few photon level, designed to demonstrate key elements for quantum information processing, loss is a leading source of failure and decoherence. Many popular examples of nonclassical optical states are known to be very sensitive to loss. This presentation will demonstrate that sensitivity to loss is not a general feature of all macroscopic entangled states, and is not a fundamental impediment to applications. The discussion will begin with some simple states and explain their sensitivity or resilience to loss, followed by a turn to linear optical quantum computing, with a focus on the 'one-way paradigm'. In recent years, tremendous theoretical advances have been made for reducing the resource requirements for quantum computing in this approach. This talk will provide an overview, explaining some strategies that have been proposed for implementing loss-tolerance.
Biographical Sketch: A theoretical physicist who has worked on a variety of topics concerning quantum optics and quantum information, Dr. Hugo Cable completed his PhD studies as a member of the Theoretical Quantum Optics and Quantum Information group of Professor Peter Knight at Imperial College, London. His thesis, supervised by Dr. Terry Rudolph, centered on localizing relational degrees of freedom, specifically on whether light from independent sources can demonstrate interference, a question which stirred a good deal of debate in the quantum optics community. Since September 2005 he has been a postdoctoral researcher in the Quantum Science and Technologies Group of Professor Jonathan Dowling at Louisiana State University, exploring a number of questions concerning quantum imaging and quantum metrology. Professional achievements include developing a method for generating N00N states of large photon number using linear optics which scales efficiently, in contrast to all previous proposals. He has also looked at the feasibility of proposals for quantum interferometric lithography, using an optical parametric amplifier as a high-flux source of nonclassical light. |
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