Hi all,
this is a reminder of Mark Byrd's talk today at 4pm in the Time
Room.
Best wishes,
Markus
Title: The effect of initial correlations on the evolution of
quantum states
Speaker: Mark Byrd (Southern Illinois University)
Abstract:
Until fairly recently, it
was generally assumed that the initial state of a quantum system
prepared for information processing was in a product state with
its environment. If this is the case, the evolution is described
by a completely positive map. However, if the system and
environment are initially correlated, or entangled, such that the
so-called quantum discord is non-zero, then the evolution is
described by a map which is not completely positive. Maps that are
not completely positive are not as well understood and the
implications of having such a map are not completely known. I
will discuss a few examples and a theorem (or two) which may help
us understand the implications of having maps which are not
completely positive.
Date: October 15, 2012 - 4:00 pm
Series: Perimeter Institute Quantum Discussions
Location: Time Room