Sticking transition in a minimal model for the collisions of active particles in quantum fluids

Shukla, Vishwanath and Brachet, Marc and Pandit, Rahul (2016) Sticking transition in a minimal model for the collisions of active particles in quantum fluids. In: PHYSICAL REVIEW A, 94 (4).

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Abstract

Particles of low velocity, traveling without dissipation in a superfluid, can interact and emit sound when they collide. We propose a minimal model in which the equations of motion of the particles, including a short-range repulsive force, are self-consistently coupled with the Gross-Pitaevskii equation. We show that this model generates naturally an effective superfluid-mediated attractive interaction between the particles; and we study numerically the collisional dynamics of particles as a function of their incident kinetic energy and the length scale of the repulsive force. We find a transition from almost elastic to completely inelastic (sticking) collisions as the parameters are tuned. We find that aggregation and clustering result from this sticking transition in multiparticle systems.

Item Type:	Journal Article
Publication:	PHYSICAL REVIEW A
Additional Information:	Copy right for this article belongs to the AMER PHYSICAL SOC, ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	03 Dec 2016 06:45
Last Modified:	03 Dec 2016 06:45
URI:	http://eprints.iisc.ac.in/id/eprint/55319

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