Using a recently developed approach for treating the three-dimensional anisotropic scattering we find considerable influence of a nonresonant laser field with intensity $I\ensuremath{\ge}{10}^{5}\text{ }\text{ }\mathrm{W}/{\mathrm{c}\mathrm{m}}^{2}$ on the Cs-Cs ultracold collisions. Strong dependence on the laser wavelength ${\ensuremath{\lambda}}_{L}$ is shown at the optical region as ${\ensuremath{\lambda}}_{L}$ becomes shorter than the critical value ${\ensuremath{\lambda}}_{0}\ensuremath{\sim}3000\text{ }\text{ }\mathrm{n}\mathrm{m}$ (of the atomic de Broglie wave $\ensuremath{\lambda}$) defining the region ${\ensuremath{\lambda}}_{0}\ensuremath{\le}\ensuremath{\lambda}$ of the $s$ -wave domination in the absence of the external field. Dependence on the laser polarization is also essential. The found effect can be applicable for controlling atom-atom interactions at ultralow temperatures.Using a recently developed approach for treating the three-dimensional anisotropic scattering we find considerable influence of a nonresonant laser field with intensity $I\ensuremath{\ge}{10}^{5}\text{ }\text{ }\mathrm{W}/{\mathrm{c}\mathrm{m}}^{2}$ on the Cs-Cs ultracold collisions. Strong dependence on the laser wavelength ${\ensuremath{\lambda}}_{L}$ is shown at the optical region as ${\ensuremath{\lambda}}_{L}$ becomes shorter than the critical value ${\ensuremath{\lambda}}_{0}\ensuremath{\sim}3000\text{ }\text{ }\mathrm{n}\mathrm{m}$ (of the atomic de Broglie wave $\ensuremath{\lambda}$) defining the region ${\ensuremath{\lambda}}_{0}\ensuremath{\le}\ensuremath{\lambda}$ of the $s$-wave domination in the absence of the external field. Dependence on the laser polarization is also essential. The found effect can be applicable for controlling atom-atom interactions at ultralow temperatures.

Physical Review LettersFeb 26, 200336 citations

Ultracold atom-atom collisions in a nonresonant laser field

Vladimir S. Melezhik, Chi‐Yu Hu

Using a recently developed approach for treating the three-dimensional anisotropic scattering we find considerable influence of a nonresonant laser field with intensity I> or =10(5) W/cm(2) on the Cs-Cs ultracold collisions. Strong dependence on the laser wavelength lambda(L) is shown at the optical region as lambda(L) becomes shorter than the critical value lambda(0) approximately 3000 nm (of the atomic de Broglie wave lambda) defining the region lambda(0)< or =lambda of the s-wave domination in the absence of the external field. Dependence on the laser polarization is also essential. The found effect can be applicable for controlling atom-atom interactions at ultralow temperatures.Using a recently developed approach for treating the three-dimensional anisotropic scattering we find considerable influence of a nonresonant laser field with intensity I> or =10(5) W/cm(2) on the Cs-Cs ultracold collisions. Strong dependence on the laser wavelength lambda(L) is shown at the optical region as lambda(L) becomes shorter than the critical value lambda(0) approximately 3000 nm (of the atomic de Broglie wave lambda) defining the region lambda(0)< or =lambda of the s-wave domination in the absence of the external field. Dependence on the laser polarization is also essential. The found effect can be applicable for controlling atom-atom interactions at ultralow temperatures.

APSMay 1, 20030 citations

Laser-induced resonances in ionizing radiative collisions

Roberto Buffa

Optics CommunicationsJul 1, 19961 citation

Controlling ultracold p -wave collisions with nonresonant light: Predictions of an asymptotic model

A. Crubellier, Rosario González‐Férez, Christiane P. Koch +1 more

Interactions in a spin-polarized ultracold Fermi gas are governed by $p$ -wave collisions and can be characterized by the $p$ -wave scattering volume. Control of these collisions by Feshbach resonances is hampered by huge inelastic losses. Here, we suggest nonresonant light control of $p$ -wave collisions, exploiting the anisotropic coupling of nonresonant light to the polarizability of the atoms. The $p$ -wave scattering volume can be controlled by strong nonresonant light, in close analogy to the $s$ -wave scattering length. For collision partners that are tightly trapped, the nonresonant light induces an energy shift directly related to the scattering volume (as defined by A. Crubellier, R. Gonz\'alez-F\'erez, C. P. Koch, and E. Luc-Koenig, preceding paper, Phys. Rev. A 99, 032709 (2019). This effect could be used to climb the ladder of the trap. We also show that controlling the scattering volume implies control, at least roughly, over the orientation at short interatomic distances of the interparticle axis relative to the polarization direction of the light. Our proposal is based on an asymptotic model that explicitly accounts for the anisotropic dipole-dipole interaction which governs the ultracold collision dynamics at long range.Interactions in a spin-polarized ultracold Fermi gas are governed by $p$-wave collisions and can be characterized by the $p$-wave scattering volume. Control of these collisions by Feshbach resonances is hampered by huge inelastic losses. Here, we suggest nonresonant light control of $p$-wave collisions, exploiting the anisotropic coupling of nonresonant light to the polarizability of the atoms. The $p$-wave scattering volume can be controlled by strong nonresonant light, in close analogy to the $s$-wave scattering length. For collision partners that are tightly trapped, the nonresonant light induces an energy shift directly related to the scattering volume (as defined by A. Crubellier, R. Gonz\'alez-F\'erez, C. P. Koch, and E. Luc-Koenig, preceding paper, Phys. Rev. A 99, 032709 (2019). This effect could be used to climb the ladder of the trap. We also show that controlling the scattering volume implies control, at least roughly, over the orientation at short interatomic distances of the interparticle axis relative to the polarization direction of the light. Our proposal is based on an asymptotic model that explicitly accounts for the anisotropic dipole-dipole interaction which governs the ultracold collision dynamics at long range.

arXiv:1807.05787Physical Review AMar 25, 20195 citations

Interference effects in scattering of the same atoms in the field of laser irradiation

Sergey G. Rautian

Journal of Experimental and Theoretical PhysicsJan 1, 20000 citations

s

-wave domination in the absence of the external field. Dependence on the laser polarization is also essential. The found effect can be applicable for controlling atom-atom interactions at ultralow temperatures.

Interactions in a spin-polarized ultracold Fermi gas are governed by

p

-wave collisions and can be characterized by the

p

-wave scattering volume. Control of these collisions by Feshbach resonances is hampered by huge inelastic losses. Here, we suggest nonresonant light control of

p

-wave collisions, exploiting the anisotropic coupling of nonresonant light to the polarizability of the atoms. The

p

-wave scattering volume can be controlled by strong nonresonant light, in close analogy to the

s

-wave scattering length. For collision partners that are tightly trapped, the nonresonant light induces an energy shift directly related to the scattering volume (as defined by A. Crubellier, R. Gonz\'alez-F\'erez, C. P. Koch, and E. Luc-Koenig, preceding paper, Phys. Rev. A 99, 032709 (2019). This effect could be used to climb the ladder of the trap. We also show that controlling the scattering volume implies control, at least roughly, over the orientation at short interatomic distances of the interparticle axis relative to the polarization direction of the light. Our proposal is based on an asymptotic model that explicitly accounts for the anisotropic dipole-dipole interaction which governs the ultracold collision dynamics at long range.