Condensed Matter Theory

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Pb(Mg1/3Nb2/3)O3: A minimal induced-moment soft pseudospin glass perspective

Physical Review B American Physical Society (APS) 89:6 (2014) 064105
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Instabilities and topological defects in active nematics

EPL 105:1 (2014) ARTN 18001

Authors:

Sumesh P Thampi, Ramin Golestanian, Julia M Yeomans
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Non-equilibrium noise in the (non-)Abelian fractional quantum Hall effect

(2014)

Authors:

Olaf Smits, JK Slingerland, Steven H Simon
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Corner contribution to the entanglement entropy of an O(3) quantum critical point in 2+1 dimensions

(2014)

Authors:

Ann B Kallin, EM Stoudenmire, Paul Fendley, Rajiv RP Singh, Roger G Melko
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Run-and-tumble dynamics in a crowded environment: Persistent exclusion process for swimmers

Physical Review E - Statistical, Nonlinear, and Soft Matter Physics 89:1 (2014)

Authors:

R Soto, R Golestanian

Abstract:

The effect of crowding on the run-and-tumble dynamics of swimmers such as bacteria is studied using a discrete lattice model of mutually excluding particles that move with constant velocity along a direction that is randomized at a rate α. In stationary state, the system is found to break into dense clusters in which particles are trapped or stopped from moving. The characteristic size of these clusters predominantly scales as α-0.5 in both one and two dimensions. For a range of densities, due to cooperative effects, the stopping time scales as T1d0.85 and as T2d0.8, where Td is the diffusive time associated with the motion of cluster boundaries. Our findings might be helpful in understanding the early stages of biofilm formation. © 2014 American Physical Society.
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