February 12, 2003, 2:00PM.
Half Dome, 3L.
Visiting Research Professor
Sciences Research Institute, Berkeley
(on leave from
University of Bristol)
of the most exotic aspects of quantum mechanics is quantum
non-locality. Quantum systems which interacted in the past and
then moved far from each other, remain, in a certain sense,
still connected with one another.
In effect quantum systems can instantaneously
“communicate” with each other (in apparent but not real
contradiction with Einstein’s relativity).
Although the concept of non-locality was first put
forward more than thirty years ago, by J.
Bell’s critical analysis of the Einstein-Podolsky-Rosen
paradox, until very recently non-locality was considered a
fringe and rather unimportant aspect of quantum mechanics.
During the last couple of years however it has become clear
that non-locality is one of the basic aspects of quantum
particular, non-locality is at the core of the new subjects of
quantum information and computation.
my talk I will describe in detail, at a very accessible level,
the basic idea of non-locality and discuss some of its
applications in quantum information.