Nanometer-scale spatial modulation of an inter-atomic interaction in a Bose-Einstein condensate

Abstract

We demonstrate nanometer-scale spatial control of inter-atomic interactions in a Bose-Einstein condensate of ytterbium(Yb). A pulsed optical standing wave, tuned near an optical Feshbach resonance varies the s-wave scattering length continuously across the standing wave pattern. The modulated mean-field energy with a spatial period of every 278 nm is monitored by a diffraction pattern in a time-of-flight image. We observe a wide scattering length control of up to 160 nm. The demonstrated spatial modulation of the scattering length proves that the high resolution control of atomic interactions is possible.

References in corpus (6)

• Collective excitations of a degenerate gas at the BEC-BCS crossover
• Tuning the scattering length with an optically induced Feshbach resonance
• Observation of heteronuclear atomic Efimov resonances
• Controlling a magnetic Feshbach resonance with laser light
• Quantum phases of interacting phonons in ion traps
• Localized modes of binary mixtures of Bose-Einstein condensates in nonlinear optical lattices

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