Classical command of quantum systems

  title={Classical command of quantum systems},
  author={Ben Reichardt and Falk Unger and Umesh V. Vazirani},
Quantum computation and cryptography both involve scenarios in which a user interacts with an imperfectly modelled or ‘untrusted’ system. It is therefore of fundamental and practical interest to devise tests that reveal whether the system is behaving as instructed. In 1969, Clauser, Horne, Shimony and Holt proposed an experimental test that can be passed by a quantum-mechanical system but not by a system restricted to classical physics. Here we extend this test to enable the characterization of… CONTINUE READING
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