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Reminder</title></head><body>
<div>This week's MIT QIP seminar will take place on Monday, Oct. 18 at
16:00 in 4-237, and features:</div>
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<div align="center"><font size="+2"><b>Modelling Decoherence in
Quantum Lattice Gases</b></font></div>
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<div align="center"><font size="+1"><i>by</i> Peter Love (<i>Tufts
Univ. Math. Dept.</i>)</font></div>
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<div align="center"><u>ABSTRACT</u></div>
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<blockquote>Quantum lattice gases are known to reproduce the Dirac
equation in one dimension and the Schroedinger equation in D
dimensions. They also represent quantum algorithms for the simulation
of quantum systems with an exponential performance advantage over
their implementation on classical computers. These models are
therefore of interest both as classical algorithms for modelling
quantum systems and as algorithms which may be efficiently implemented
on future quantum computers.</blockquote>
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<blockquote>In both cases, the role of decoherence arising from the
interaction of the model with an environment is of interest. If we
consider these models in the context of simulation of quantum systems,
the introduction of an environment is of interest from the point of
view of correspondence. If we consider these models as quantum
algorithms the introduction of an environment enables us to study the
effect of a finite error rate in our quantum computer. In this talk,
we discuss one method of coupling quantum lattice gases to an
environment and present simulation and analytic results for this error
model.</blockquote>
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<div>Next week's feature: Paolo Zanardi (ISI, Italy) will speak on
"Bipartite Entanglement and Entropic Boundary Law in Lattice Spin
Systems".</div>
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