Hi all,
next week, we have a talk by Mark Byrd on Monday 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