January 2009 - ITP-quantumseminare

[QI] QI Seminar
by Dejan D. Dukaric 27 Jan '09

27 Jan '09

Dear All, This weeks research day on Thursday will be at the Computer Science Building room IFW D 42. Tobias will present his Master Thesis. Speaker: Tobias Ambühl Title: Secure Bits with Quantum Pseudo-Telepathy Time: 5 pm Place: IFW D42 Abstract: Motivated by the concept of quantum pseudo-telepathy games as well as by quantum key distribution protocols we try to answer the question whether it is possible to generate a perfectly secure, shared bit between two parties by a single usage of quantum correlations and a performance of local operations on the input and output. We provide both parties with some prior shared entanglement and the possibility of postselection, e.g. discard of inputs and outputs, aiming to prevent any eavesdropper bound by the non-signaling condition from successfully performing an attack. After, in a first step, defining the framework and setting up the requirements we are going to see that quantum mechanics does not allow for a physical simulation of such correlations. For the case of binary output we will even see that, in order to make perfectly correlated bits perfectly secure, we would need maximal non-local correlations which also prohibits a quantum physical representation. Cheers, Dejan

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No seminar next week
by Roger Colbeck 15 Jan '09

15 Jan '09

Hi all, There will be lots of talks next week at the QSIT meeting, so I suggest we don't have one next Tuesday as well. Cheers, Roger

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This week
by Roger Colbeck 11 Jan '09

11 Jan '09

Hi all, This Tuesday's talk will be in HIT K51 at 5pm. I will give an introductory talk on entropy measures. This will be aimed at people who are unfamiliar with them; there will not be much for those that have worked with them. I will start classically and motivate the min and max entropies before moving on to their quantum generalizations. The time allocation can depend on the audience's preferences. Roger

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research day
by Roger Colbeck 05 Jan '09

05 Jan '09

Hi all, Tomorrow's talk will be by Esther in IFW D44 at 5pm. The title is "Introduction to device independent security" subtitle "what is the difference between a rock and a photon?" Should be entertaining (and accessible) for all. See you there. Roger

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