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Center for Astrophysics Research and Technologies Seminar Series Information


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Diving Deep into a Quantum-Information-Processing Problem: Quantum Limits on the Performance of Linear Amplifiers

Thursday September 14, 2017
11:00 am

 Presenter:  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
 Series:  OSE Seminars
 Abstract:  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.
 File:  http://panda3.phys.unm.edu/videos/OSE-170914-Caves.mp4
 Location:  Room 190, Physics & Astronomy

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