Laser-Assisted Self-Induced Feshbach resonance for ultracold polar molecule formation

Abstract

We propose a new type of Feshbach resonance occurring when two different ultracold atoms in their ground state undergo an s-wave collision in the presence of a continuous-wave laser light. The atoms collide in the dissociation continuum of the molecular electronic ground state which is coupled by the light to a rovibrational level of the same electronic ground state: we name this a Laser-Assisted Self-Induced Feshbach Resonance (LASIFR). This mechanism, valid for all polar molecules, is analyzed on the example of ultracold 87Rb and 84Sr atoms, for which the laser frequency falls in the THz range. The control of the LASIFR with the laser frequency and intensity allows for a strong increase of the pair probability density at short distances, which tremendously increases the number of atoms pairs transfered toward the absolute ground state level by STImulated Rapid Adiabatic Passage (STIRAP). The LASIFR results in the observation of a standard Fano profile in the pump transition of the STIRAP process, and is also promising for the optical control of the interspecies scattering length without atom losses.

References in corpus (26)

• Feshbach Resonances in Ultracold Gases
• A High Phase-Space-Density Gas of Polar Molecules
• Cold and Ultracold Molecules: Science, Technology, and Applications
• A toolbox for lattice spin models with polar molecules
• Ultracold dense samples of dipolar RbCs molecules in the rovibrational and hyperfine ground state
• Ultracold Dipolar Gas of Fermionic ${}^{23}$Na${}^{40}$K Molecules in their Absolute Ground State
• Influence of nearly resonant light on the scattering length in low-temperature atomic gases
• Creation of an ultracold gas of ground-state ${}^{23}{\mathrm{Na}}^{87}\mathrm{Rb}$ molecules
• Calculation of accurate permanent dipole moments of the lowest ${}^{1,3}{\Sigma }^{+}$ states of heteronuclear alkali dimers using extended basis sets
• Long-Lived Ultracold Molecules with Electric and Magnetic Dipole Moments
• Formation and interactions of cold and ultracold molecules: new challenges for interdisciplinary physics
• Ultracold RbSr molecules can be formed by magnetoassociation
• The coupling of the X${}^1{\Sigma }^{+}$ and a${}^3{\Sigma }^{+}$ states of KRb
• Giant formation rates of ultracold molecules via Feshbach Optimized Photoassociation
• Modeling the adiabatic creation of ultracold, polar ${}^{23}\mathrm{N}{\mathrm{a}}^{40}\mathrm{K}$ molecules
• Observation of Feshbach resonances between alkali and closed-shell atoms
• Optical Feshbach resonances: Field-dressed theory and comparison with experiments
• The RbSr ${}^2{\Sigma }^{+}$ ground state investigated via spectroscopy of hot & ultracold molecules
• Ground and excited state properties of the polar and paramagnetic RbSr molecule: a comparative study
• Making Cold Molecules by Time-dependent Feshbach Resonances
• Experimental realization of ultracold Yb-${}^7\mathrm{Li}$ mixtures in mixed dimensions
• Controlling magnetic Feshbach resonances in polar open-shell molecules with non-resonant light
• Prospects for making polar molecules with microwave fields
• Proposal for the formation of ultracold deeply-bound RbSr dipolar molecules by all-optical methods
• Probing the Efimov discrete scaling in atom-molecule collision
• Effective Control of Cold Collisions with Radio Frequency Fields

Cited by in corpus (5)

• Complete quantum coherent control of ultracold molecular collisions
• Laser control of ultracold molecule formation: The case of RbSr
• Magnetic Feshbach resonances in ultracold atom-molecule collisions
• Formation of ultracold triatomic molecules by electric microwave association
• Coherent control mechanisms of Penning and associative ionization in cold He${}^{\ast }(2^3\text{S})$-He${}^{\ast }(2^3\text{S})$ reactive scattering