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