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<p class="MsoNormal"><span style="font-family:"Georgia","serif"">Please join us for the CMT Seminar presented by Paul Kwiat, University of Illinois-Urbana Champaign on Monday, December 9<sup>th</sup> at 11:30am in the Smith Seminar Room (1080 PRB).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Georgia","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-family:"Georgia","serif"">"The End of Local Realism"<o:p></o:p></span></b></p>
<p class="MsoNormal"><span style="font-family:"Georgia","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Georgia","serif"">Abstract: Ever since John Bell showed that quantum mechanics could give different predictions from a local realistic model in an appropriate experiment, there has been wide interest in carrying
out such a test. Unfortunately, to date no truly unambiguous test has ever been completed, due to the existence of two experimental loopholes: the “locality loophole” and the “detection loophole”. Each of these has been closed individually in different experimental
systems – photons, atoms, ions, and superconductors – but no system has simultaneously closed each of the loopholes. Here we present a photon-based experiment that violates the Bell inequality, free of the detection loophole. We also discuss some rather subtle
points in performing such an experiment, to ensure that new loopholes do not arise. Our experiment has some “efficiency overhead”, but in its current form probably insufficient to perform a fully loophole-free test of local realism, which requires much larger
separations between source and detectors. We discuss possible improvements, as well as the application to device-independent quantum communication, e.g., certified private random number generation. Time permitting, our efforts to turn undergraduates into Schrodinger
cats will be discussed.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Georgia","serif""><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Georgia","serif"">Thank you,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Georgia","serif"">Trisch<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><img width="224" height="45" id="Picture_x0020_1" src="cid:image001.png@01CEF353.34249190" alt="The Ohio State University"><br>
<b><span style="color:#C00000">Trisch Longbrake</span></b><o:p></o:p></p>
<p class="MsoNormal">Administrative Associate I<br>
<span style="color:#C00000">Department of Physics</span> Condensed Matter<br>
2196 Physics Research Building, 191 W. Woodruff Ave., Columbus, OH 43210<br>
614-292-2778 Office / 614-292-7557 Fax<br>
<a href="mailto:longbrake.6@osu.edu">longbrake.6@osu.edu</a> <a href="http://osu.edu/">
osu.edu</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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