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Events at Physics

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Events During the Week of September 26th through October 3rd, 2010

Monday, September 27th, 2010

Plasma Physics (Physics/ECE/NE 922) Seminar
"Plasma Confinement on Shaped Open Field Lines: Results from the Maryland Centrifugal Experiment"
Time: 12:05 pm
Place: 2535 Engineering Hall
Speaker: Adil Hassam, University of Maryland/Dept of Physics
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High Energy Seminar
A New Way to Measure Spin at Hadron Colliders
Time: 4:00 pm
Place: 4274 Chamberlin (Coffee and Cookies at 3:45 pm)
Speaker: Matthew Buckley, Fermilab
Abstract: I propose a new technique for determining the spin of new massive particles
that might be discovered at the Large Hadron Collider. The method relies on
pair-production of the new particles in a kinematic regime where the vector
boson fusion production mechanism is enhanced. For this regime, I show that
the distribution of the leading jets as a function of their relative
azimuthal angle can be used to distinguish spin-0 from spin-1/2 particles. I
illustrate this effect by considering the particular cases of (i)
strongly-interacting, stable particles and (ii) supersymmetric particles
carrying color charge. I argue that this method should be applicable in a
wide range of new physics scenarios.
Host: Michael Ramsey-Musolf
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Plasma Theory Seminar
"Kinetic Shielding of Magnetic Islands in 3-D Equilibria"
Time: 4:00 pm
Place: 514 ERB
Speaker: Chris Hegna, UW-Madison Engineering Physics
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Tuesday, September 28th, 2010

Chaos & Complex Systems Seminar
"Simplest Chaotic Circuit"
Time: 12:05 pm
Place: 4274 Chamberlin Hall
Speaker: Bharathwaj Muthuswamy, Milwaukee School of Engineering/Dept of Electrical Engineering
Abstract: A chaotic attractor has been observed with an autonomous circuit that uses only two energy-storage elements: a linear passive inductor and a linear passive capacitor. The other element is a nonlinear active memristor. Hence the circuit has only three circuit elements in series.We discuss this circuit topology, show several attractors and illustrate local activity via the memristor's DC v-i characteristic.
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Wednesday, September 29th, 2010

No events scheduled

Thursday, September 30th, 2010

R. G. Herb Condensed Matter Seminar
Spin spirals in underdoped cuprates: theory and experiment
Time: 10:00 am
Place: 5310 Chamberlin
Speaker: Oleg P. Sushkov, University of New South Wales
Abstract: To shed light on generic physics of cuprate superconductors (doped Mott insulators) I discuss and relate the following issues:

1)Incommensurate spin ordering in LSCO and YBCO.
2)Difference and similarities between these compounds: disorder versus bilayer.
3)Quantum Critical and Lifshitz points in YBCO and LSCO.
4)Magnetic Quantum Oscillations in YBCO.
5)Recent MSR data.
Host: Andrey Chubukov
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NPAC (Nuclear/Particle/Astro/Cosmo) Forum
Fundamental Physics at Low Energies
Time: 11:00 am
Place: 4274 Chamberlin
Speaker: Joerg Jaeckel, Durham University
Abstract: Over the years we have accumulated a large number of indications for physics beyond the standard model. This new physics is often sought-after at high masses and energies. However, over recent years it has become increasingly clear that new physics can also appear at low energy, but extremely weak coupling. Experiments and observations at this `low energy frontier' therefore provide a powerful tool to gain insight into fundamental physics, which is complementary to accelerators.
Host: Sonny Mantry
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Astronomy Colloquium
Models of Wind-Driving Protostellar Disks
Time: 3:30 pm
Place: 4421 Sterling Hall Same Location
Speaker: Seth Teitler, UW Astronomy Dept
Abstract: TBD
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Department of Physics Special Seminar
Dark Matter Searches with DM-Ice and CUORE
Time: 4:00 pm
Place: 2241 Chamberlin (cookies & coffee served at 3:30 p.m)
Speaker: Reina Maruyama, University of Wisconsin at Madison
Abstract: Observations from cosmology tell us that less than 4% of our Universe is comprised of ordinary visible matter, and that the rest is made of Dark Matter and Dark Energy. Much of our understanding of Dark Matter is inferred from astronomical and astrophysical observations. There are concerted efforts to study the properties of Dark Matter by directly observing its interaction in underground detectors. I will present two new efforts: DM-Ice, a sodium-iodide detector to be located in the Antarctic Ice at the South Pole, will search for the expected annual modulation of the Dark Matter signal. I will also discuss the potentialof CUORE as a Dark Matter experiment.
Host: Baha Balantekin
Poster: https://www.physics.wisc.edu/events/posters/2010/1942.pdf
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Graduate Introductory Seminar
High Energy Experiment
Time: 5:30 pm
Place: 2223 Chamberlin Hall
Speaker: Carlsmith, Dasu, Heeger, Herndon, Mellado, Pan, Pondrom, Smith, Wu
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Friday, October 1st, 2010

Physics Department Colloquium
The Phase Diagrams of the High Temperature Superconductors
Time: 4:00 pm
Place: 2241 Chamberlin Hall (coffee at 3:30 pm)
Speaker: Subir Sachdev, Harvard
Abstract: The last three decades have witnessed the discovery of many new superconductors, with properties dramatically different from the conventional low temperature superconductors described by the Bardeen-Cooper-Schrieffer theory. These new superconductors can have much higher critical temperature, and all display antiferromagnetism in their phase diagrams. I will highlight important experimental discoveries of the past two years, and argue that they support a unifying theory and phase diagram for these new superconductors. I will also note the still mysterious &quot;strange metal&quot; region of the phase diagram, and its recent holographic description by methods drawn from string theory.
Host: Chubukov
Poster: https://www.physics.wisc.edu/events/posters/2010/1747.pdf
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