Condensed Matter Theory

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Itinerant ferromagnetism in an atom trap

Physical Review B - Condensed Matter and Materials Physics 79:22 (2009)

Authors:

I Berdnikov, P Coleman, SH Simon

Abstract:

We propose an experiment to explore the magnetic phase transitions in interacting fermionic Hubbard systems and describe how to obtain the ferromagnetic phase diagram of itinerant-electron systems from these observations. In addition, signatures of ferromagnetic correlations in the observed ground states are found: for large trap radii (trap radius RT >4, in units of coherence length ξ), ground states are topological in nature-a "skyrmion" in two dimension, and a "hedgehog" in three dimension. © 2009 The American Physical Society.
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Exact Solution for Bulk-Edge Coupling in the Non-Abelian $\nu=5/2$ Quantum Hall Interferometer

(2009)

Authors:

Bernd Rosenow, Bertrand I Halperin, Steven H Simon, Ady Stern
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Physics. A sound (and light) way to measure confined electrons.

Science 324:5930 (2009) 1022-1023
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BRAIDING AND ENTANGLEMENT IN NONABELIAN QUANTUM HALL STATES

International Journal of Modern Physics B World Scientific Publishing 23:12n13 (2009) 2727-2736

Authors:

G ZIKOS, K YANG, NE BONESTEEL, L HORMOZI, SH SIMON
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Hydrodynamics of linked sphere model swimmers.

J Phys Condens Matter 21:20 (2009) 204108

Authors:

GP Alexander, CM Pooley, JM Yeomans

Abstract:

We describe in detail the hydrodynamics of a simple model of linked sphere swimmers. We calculate the asymptotic form of both the time averaged flow field generated by a single swimmer and the interactions between swimmers in a dilute suspension, showing how each depends on the parameters describing the swimmer and its swimming stroke. We emphasize the importance of time reversal symmetry in determining the far field flow around a swimmer and show that the interactions between swimmers are highly dependent on the relative phase of their swimming strokes.
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