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   COLLOQUIUM OF THE LABORATORY FOR COMPUTER DESIGN OF MATERIALS
                   School of Computational Sciences
                           (CSI 898-Sec 001)
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         New temporal and nonlocal aspects of quantum theory
                and their relevance to molecular dynamics

                             Jeff Tollaksen
       School of Computational Sciences, George Mason University

This talk will focus on novel descriptions developed by our group which
characterize quantum systems during the time interval between two
successive ideal measurements, described theoretically by weak values 
and experimentally by weak measurements.  Weak measurements limit 
disturbance and are constructed from pre-and-post-selected ensembles.  
With post-selected ensembles, we add a second final measurement which 
divides the pre-selected-only ensemble into sub-ensembles characterized 
by the initial and final measurement outcomes. Weak value distributions 
are dramatically different from the usual eigenvalue distributions of
pre-selected-only ensembles. I will show that weak values obey a simple,
intuitive, and self-consistent logic. I will conclude by suggesting how
these new discoveries in the foundations of quantum theory could impact
the molecular dynamics field, including their relevance to: 1) any
perturbation theory, 2) molecular tunneling phenomenon, and 3)
Hartree-Fock methods.

                         Monday , November 24, 2003
                                  4:30 pm
                        Room 206, Science & Tech. I

Refreshments will be served at 4:15 PM.
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Find the schedule at http://www.scs.gmu.edu/lcdm/seminar/schedule.html
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