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Announcements</title></head><body>
<div>This Monday's MIT QIP seminar will take place on Nov. 15 at 16:00
in 4-237, and features:</div>
<div><br></div>
<hr>
<div align="center"><font size="+2"><b>On the Duality between Quantum
States and Quantum Maps</b></font></div>
<div align="center"><br></div>
<div align="center"><font size="+1"><i>by</i> Karol Zyczkowski
(<i>Perimeter Inst., Canada</i> and<i> Jagiellonian Univ.,
Poland</i>)</font></div>
<div align="center"><br></div>
<div align="center"><u>ABSTRACT</u></div>
<div><br></div>
<blockquote>Using the concept of the dynamical matrix and the
Jamiolkowski isomorphism we explore the relation between the set of
quantum operations (dynamics) and the set of density matrices acting
on an extended Hilbert space (kinematics). An analogous relation is
established between the classical maps and an extended space of the
discrete probability distributions.</blockquote>
<blockquote><br></blockquote>
<blockquote>We investigate the space of quantum operations, as well as
the larger space of maps which are positive, but not completely
positive. and present a constructive decomposability criterion.
Furthermore, we define and analyze a class of unistochastic
operations, determined by unitary matrices of an extended
dimensionality.</blockquote>
<div><br></div>
<hr>
<div>The following MIT QIP seminar will take place on<b> FRIDAY, Nov.
19 at 14:00 hours in room 4-153</b>, and features:</div>
<div><br></div>
<hr>
<div align="center"><font size="+2"><b>Testing the Limits of Quantum
Mechanics: Motivation, State of Play, and Prospects</b></font></div>
<div align="center"><br></div>
<div align="center"><font size="+1"><i>by</i> Anthony Leggett
(<i>Univ. of Illinois at Urbana-Champaign</i>)</font></div>
<div align="center"><br></div>
<div align="center"><u>ABSTRACT</u></div>
<div><br></div>
<blockquote>I present the motivation for experiments which attempt to
generate,and verify the existence of,quantum superpositions of two or
more states which are by some reasonable criterion
"macroscopically" distinct,and show that various a priori
objections to this program made in the literature are flawed.I review
the extent to which such experiments currently exist in the areas of
free-space molecular diffraction,magnetic biomolecules, quantum optics
and Josephson devices,and sketch possible future lines of development
of the program.</blockquote>
<div><br></div>
<hr>
<div><b>NB:</b> There will be no QIP seminar on Monday, Nov.
22nd.</div>
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