Laser-induced interactions

Ephraim Shahmoon, Gershon Kurizki

Polarizable dipoles, such as atoms, molecules, or nanoparticles, subject to laser radiation may attract or repel each other. We derive a general formalism in which such laser-induced dipole-dipole interactions (LIDDIs) in any geometry and for any laser strength are described in terms of the resonant dipole-dipole interaction (RDDI) between dipoles dressed by the laser. This approach provides a simple route towards the analysis of LIDDI in a general geometry. Our general results reveal LIDDI effects due to nonlinear dipolar response to the laser, previously unaccounted for. The origin of these nonlinear effects is discussed. Our general formalism is illustrated for LIDDI between atoms in a cavity.

Matt Kalinski, I. E. Mazets, Gershon Kurizki +3 more

We present variational and numerical solutions of the generalized Gross--Pitaevskii equation for an atomic Bose--Einstein condensate with time-dependent, laser-induced dipole-dipole interactions (LIDDI). The formation of a supersolid ground state due to LIDDI in an elongated (cigar-shaped) BEC is investigated. It is found that the supersolid structure emerges if the laser intensity exceeds a critical value, which depends on the linear density of atoms in the BEC.

Stephen E. Harris, R. W. Falcone, William R. Green +3 more

Axel Donges, Reinhard Noll

P. L. Knight

A theory of the dynamics of radiative collisions is presented in which the laser-induced energy transfer is described by a dipole-dipole interaction between non-identical atoms compounded with stimulated absorption to a further excited level of the acceptor during the collisional interaction.