Events at Physics

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Events on Thursday, February 18th, 2010

R. G. Herb Condensed Matter Seminar
From quantum electronics to quantum nanofluidics
Time: 10:00 am
Place: 5310 Chamberlin
Speaker: Guillaume Gervais, McGill University
Abstract: It has long been known that the flow of electric charges in an electrical circuit maintained by a voltage drop is analogous to the fluidic mass flow in a pipe maintained under a pressure differential. In electronic devices, and at small scale, lowering the dimensionality can have drastic consequences on the flow of charges in electronic circuit. In two dimension, series of quantized states appear with quantized Hall resistance, competing with electron crystals and other many-body states. In one dimension, the conductance of a wire itself becomes quantized in unit of 2e^2/h due to confinement and quantum effects. In this talk, I will present an overview of recent results for the quantum electronics studied in ultra-clean semiconductor materials with an emphasis on possible non-abelian quantum states. I will also discuss our endeavour and progress to measure the mass flow of a quantum fluid confined into a nanopipe where, in analogy with the quantum electronics in one dimension, the conductance of the pipe should become quantized in unit of 2m^2/h.
Host: Mark Eriksson
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NPAC (Nuclear/Particle/Astro/Cosmo) Forum
The Axis of Evil - Large Scale Anomalies in Maps of the CMB
Time: 4:00 pm
Place: 4274 Chamberlin Hall
Speaker: Ted Bunn, University of Richmond
Host: Timbie
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