Hi all,
next week, we have a talk by Victor Veitch on Wednesday at 4pm in
the Time Room.
Best wishes,
Markus
Title: Negative Quasi-Probability Representation is a Necessary
Resource for Quantum Computation
Speaker: Victor Veitch (IQC Waterloo)
Abstract:
The magic state model of quantum computation gives a recipe for
universal quantum computation using perfect Clifford operations and
repeat preparations of a noisy ancilla state. It is an open problem
to determine which ancilla states enable universal quantum
computation in this model. Here we show that for systems of odd
dimension a necessary condition for a state to enable universal
quantum computation is that it have negative representation in a
particular quasi-probability representation which is a discrete
analogue to the Wigner function. This condition implies the
existence of a large class of bound states for magic state
distillation: states which cannot be prepared using Clifford
operations but do not enable universal quantum computation.
Date: March 21, 2012 - 4:00 pm
Series: Perimeter Institute Quantum Discussions
Location: Time Rm