title: Cross-over between central and non-central conservative effective forces in a modulated colloidal fluid.
abstract: We study by Monte Carlo simulations the effective forces between two particles dispersed in a two-dimensional colloidal fluid, modulated in one direction by a spatially periodic external potential. When the modulation strength exceeds the strength of interaction between the dispersed and dispersing particles, the anisotropic effective forces, show cross-over between central and non-central nature, although the effective forces remain conservative. The non-central nature of the effective forces depends on the orientation of the separation vector between the dispersed particles with respect to the modulation direction.
authors.affiliation: Department of Physics, Lady Brabourne College, P-1∕2, Suhrawardy Avenue, Kolkata 700017, West Bengal, India.
authors.forename: Chhanda Basu
authors.initials: CB
authors.lastname: Chaudhuri
authors.forename: Srabani
authors.initials: S
authors.lastname: Chakrabarty
authors.forename: J
authors.initials: J
authors.lastname: Chakrabarti