Condensed Matter Theory: publications

Critical points in coupled Potts models and critical phases in coupled loop models

(2008)

Authors:

Paul Fendley, Jesper Lykke Jacobsen

The collapse transition on superhydrophobic surfaces

(2008)

Authors:

H Kusumaatmaja, ML Blow, A Dupuis, JM Yeomans

A Three Dimensional Kasteleyn Transition: Spin Ice in a [100] Field

(2008)

Authors:

Ludovic DC Jaubert, JT Chalker, Peter CW Holdsworth, R Moessner

Analytic results for the three-sphere swimmer at low Reynolds number.

Phys Rev E Stat Nonlin Soft Matter Phys 77:3 Pt 2 (2008) 036308

Authors:

Ramin Golestanian, Armand Ajdari

Abstract:

The simple model of a low Reynolds number swimmer made from three spheres that are connected by two arms is considered in its general form and analyzed. The swimming velocity, force-velocity response, power consumption, and efficiency of the swimmer are calculated both for general deformations and also for specific model prescriptions. The role of noise and coherence in the stroke cycle is also discussed.

A frustrated nanomechanical device powered by the lateral Casimir force

ArXiv 0802.4144 (2008)

Authors:

MirFaez Miri, Ramin Golestanian

Abstract:

The coupling between corrugated surfaces due to the lateral Casimir force is employed to propose a nanoscale mechanical device composed of two racks and a pinion. The noncontact nature of the interaction allows for the system to be made frustrated by choosing the two racks to move in the same direction and forcing the pinion to choose between two opposite directions. This leads to a rich and sensitive phase behavior, which makes the device potentially useful as a mechanical {\em sensor} or {\em amplifier}. The device could also be used to make a mechanical {\em clock} signal of tunable frequency.

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