A reminder of Victor Veitch's talk at 4pm in the Time room at PI.
Title:
Negative Quasi-Probability Representation is a Necessary Resource
for Quantum Computation
Speaker: Victor Veitch (IQC)
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