Mathematics Colloquia and Seminars

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The fundamental principles of quantum mechanics forbid the possibility of making perfect quantum copies ("clones") of an arbitrary quantum state. We begin by reviewing the corresponding no-go results (the no-cloning and no-broadcasting theorems) and their relation to quantum entropy. Given these no-go results, it is natural to ask how well one can do when settling for approximate cloning. We report on recent joint work with Mark Wilde where we use the entropic approach to derive bounds on the performance of certain approximate cloning operations. No prior knowledge of notions from quantum information theory will be assumed.

Note: different day and location!