OSE Seminars
Diving Deep into a Quantum-Information-Processing Problem: Quantum Limits on the Performance of Linear Amplifiers
Presented by Dr. Carlton Caves Distinguished Professor of Physics and Astronomy, UNM and the Director of the Center for Quantum Information and Control, University of New Mexico
Josephson-effect linear amplifiers now operate at the fundamental quantum limit on noise temperature for linear amplifiers. So why not do this old problem---quantum limits on the performance of linear amplifiers---right, using the modern tools of quantum information theory? I will discuss the general limits on the performance of linear amplifiers, both those that act deterministically and those that, like air travel, only work some of the time. I might get around to discussing how this question generalizes to arbitrary linear phase-space transformations for multiple modes. All of this illustrates how an old problem---in this case, a problem 70 years old---just keeps on giving as improving experimental techniques pose new questions and new theoretical tools allow those questions to be answered.
11:00 am, Thursday, September 14, 2017
PAIS-2540, PAIS
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