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Reminder</title></head><body>
<div>This week's MIT QIP seminar will take place on Monday, Sep. 27 at
16:00 in 4-237, and features:</div>
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<div align="center"><font size="+2"><b>Quantum Limits on Global
Positioning Systems</b></font></div>
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<div align="center"><font size="+1"><i>by</i> Professor Seth Lloyd
(<i>MIT Mechanical Engineering</i>)</font></div>
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<div align="center"><u>ABSTRACT</u></div>
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<blockquote>This talk derives fundamental physical limits to the
accuracy with which systems like the global positioning system (GPS)
can map out the geometry of space and time. The so-called `standard
quantum limit' may be standard and may be quantum, but it is not a
limit: it can be surpassed using quantum effects such as entanglement
and squeezing. Results from the physics of computation can be used to
derive a new bound, the quantum geometric limit, for the accuracy to
which distance and time can be measured.</blockquote>
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<div>Next week's feature: Prof. Jeff Shapiro (MIT EECS & RLE) on
the "Capacity of Bosonic Communications".</div>
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