[quantum-info] Today's PIQuDos

[Markus Mueller]

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


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