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This Week at Physics

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Events on Thursday, October 18th, 2012

R. G. Herb Condensed Matter Seminar
Quantum Technology: The Second Quantum Revolution
Time: 10:00 am
Place: 5310 Chamberlin
Speaker: Jonathan Dowling, Louisiana State University
Abstract: We are currently in the midst of a second quantum revolution. The first quantum revolution gave us new rules that govern physical reality. The second quantum revolution will take these rules and use them to develop new technologies. In this review we discuss the principles upon which quantum technology is based and the tools required to develop it. We discuss a number of examples of research programs that could deliver quantum technologies in coming decades including; quantum information technology, quantum electromechanical systems, coherent quantum electronics, quantum optics and coherent matter technology.
Host: Coppersmith & Saffman
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Astronomy Colloquium
Blue Straggler Formation in the Old Open Cluster NGC188
Time: 3:30 pm
Place: 4421 Sterling Hall
Speaker: Aaron Geller, Northwestern University
Abstract: <br>
<br>
Open clusters occupy a compelling regime for blue straggler formation. Their moderate stellar densities permit blue straggler formation through all of the known mechanisms, namely collisions, mergers and mass transfer. Furthermore, the accessibility of open clusters to both detailed observations and sophisticated N-body simulations provides unique opportunities to investigate the origins of blue stragglers in great detail. Perhaps the most well-studied blue straggler population in an open cluster is that of NGC 188. This ~7 Gyr open cluster hosts 21 blue stragglers, 16 of which are known to have binary companions, as revealed by our multi-epoch WIYN/Hydra radial-velocity survey. The majority of these blue stragglers have ~0.5 Msun companions that orbit with periods of order 1000 days and have modest eccentricities. Comparisons with predictions from N-body simulations of NGC 188 show that collisions and mergers cannot create such blue stragglers. (Although these mechanisms may account for some or all of the other blue stragglers in the cluster.) Instead the dominant formation mechanism for the blue stragglers in NGC 188 is most likely mass transfer processes.<br>
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NPAC (Nuclear/Particle/Astro/Cosmo) Forum
Physics in a Big Universe
Time: 4:00 pm
Place: 4274 Chamberlin
Speaker: Sean Carroll, Caltech
Host: Halzen
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Graduate Introductory Seminar
High Energy Collider Experiment
Time: 5:45 pm
Place: 2223 Chamberlin Hall
Speaker: Carlsmith, Dasu, Herndon, Mellado, Pan, Smith, Wu, UW Madison
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