Tuning a magnetic Feshbach resonance with spatially modulated laser light
arXiv:1404.6622 · doi:10.1103/PhysRevA.90.052722
Abstract
We theoretically investigate the control of a magnetic Feshbach resonance using a bound-to-bound molecular transition driven by spatially modulated laser light. Due to the spatially periodic coupling between the ground and excited molecular states, there exists a band structure of bound states, which can uniquely be characterized by some extra bumps in radio-frequency spectroscopy. With the increasing of coupling strength, the series of bound states will cross zero energy and directly result in a number of scattering resonances, whose position and width can be conveniently tuned by the coupling strength of the laser light and the applied magnetic field (i.e., the detuning of the ground molecular state). In the presence of the modulated laser light, universal two-body bound states near zero-energy threshold still exist. However, compared with the case without modulation, the regime for such universal states is usually small. An unified formula which embodies the influence of the modulated coupling on the resonance width is given. The spatially modulated coupling also implies a local spatially varying interaction between atoms. Our work proposes a practical way of optically controlling interatomic interactions with high spatial resolution and negligible atomic loss.
9pages, 5figure
References in corpus (30)
- Many-Body Physics with Ultracold Gases
- Feshbach Resonances in Ultracold Gases
- Ultracold atomic gases in optical lattices: mimicking condensed matter physics and beyond
- Production of cold molecules via magnetically tunable Feshbach resonances
- Evidence for Efimov quantum states in an ultracold gas of cesium atoms
- Sonic analog of gravitational black holes in Bose-Einstein condensates
- Tuning the scattering length with an optically induced Feshbach resonance
- Resonance superfluidity in a quantum degenerate Fermi gas
- Influence of nearly resonant light on the scattering length in low-temperature atomic gases
- Precise determination of Li cold collision parameters by radio-frequency spectroscopy on weakly bound molecules
- Numerical observation of Hawking radiation from acoustic black holes in atomic Bose-Einstein condensates
- Coherent molecular solitons in Bose-Einstein condensates
- Nanometer-scale spatial modulation of an inter-atomic interaction in a Bose-Einstein condensate
- Controlling a magnetic Feshbach resonance with laser light
- Controllable soliton emission from a Bose-Einstein condensate
- Systematic study of Optical Feshbach Resonances in an ideal gas
- Inducing an optical Feshbach resonance via stimulated Raman coupling
- Controlling Condensate Collapse and Expansion with an Optical Feshbach Resonance
- Optical tuning of the scattering length of cold alkaline earth atoms
- Radio-Frequency Transitions on Weakly-Bound Ultracold Molecules
- Extended molecules and geometric scattering resonances in optical lattices
- Localized modes of binary mixtures of Bose-Einstein condensates in nonlinear optical lattices
- Formation of molecules near a Feshbach resonance in a 1D optical lattice
- Efimov States in a Bose-Einstein Condensate near a Feshbach Resonance
- Optical control of Feshbach resonances in Fermi gases using molecular dark states
- Optical control of a magnetic Feshbach resonance in ultracold Fermi gases
- Combination of a magnetic Feshbach resonance and an optical bound-to-bound transition
- Spatially Modulated Interaction Induced Bound States and Scattering Resonances
- Radio-frequency spectroscopy of weakly bound molecules in spin-orbit coupled atomic Fermi gases
- Spatially varying interactions induced in atomic gases by optical Feshbach resonance