Detection efficiency loophole in tests of quantumness (Dr. M. Pawlowski)

  • Date: Sep 13, 2016
  • Time: 11:30 AM - 12:30 PM (Local Time Germany)
  • Speaker: Dr. inż. Marcin Pawlowski, National Quantum Information Centre in Gdańsk, Poland
  • Room: B 2.46 - Theory Seminar Room
  • Host: MPQ, Theory Division
Tests of quantumness are experiments which enable us to exclude the possibility of modeling them with classical means. They enable us to prove strong statements about the nature of the universe and obtain cryptographic protocols with an unprecedented level of security.

One of the biggest problems with these experiments is called "detection efficiency loophole". It refers to the fact that with the current technology most of the results is inconclusive because of the losses in transmission and detection of the particles. In this talk I'll start by presenting the loophole and outlining the dangers it posses both to fundamental research and practical cryptography. Then I'll discuss our latest results on optimization of setups and procedures which increase the critical amount of tolerated losses above which the experiments are inconclusive.

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