dorsal/arxiv
View SchemaProbing Ultracold Collisional Dynamics with Frequency-Chirped Pulses
| Authors | M. J. Wright, J. A. Pechkis, J. L. Carini, P. L. Gould |
|---|---|
| Categories | |
| ArXiv ID | physics/0611003 |
| URL | https://arxiv.org/abs/physics/0611003 |
| DOI | 10.1103/PhysRevA.74.063402 |
Abstract
We report on the dynamics of ultracold collisions induced by near-resonant frequency-chirped light. A series of identical chirped pulses, separated by a variable delay, is applied to an ultracold sample of 85Rb, and the rate of inelastic trap-loss collisions is measured. For small detunings of the chirped light below the atomic resonance, we observe that the rate of collisions induced by a given pulse can be increased by the presence of an earlier pulse. We attribute this to the enhancement of short-range collisional flux by the long-range excitation of atom pairs to an attractive molecular potential. For larger detunings and short delays, we find that a leading pulse can suppress the rate of collisions caused by a following pulse. This is due to a depletion of short-range atom pairs by the earlier pulse. Comparison of our data to classical Monte-Carlo simulations of the collisions yields reasonable agreement.
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"abstract": "We report on the dynamics of ultracold collisions induced by near-resonant\nfrequency-chirped light. A series of identical chirped pulses, separated by a\nvariable delay, is applied to an ultracold sample of 85Rb, and the rate of\ninelastic trap-loss collisions is measured. For small detunings of the chirped\nlight below the atomic resonance, we observe that the rate of collisions\ninduced by a given pulse can be increased by the presence of an earlier pulse.\nWe attribute this to the enhancement of short-range collisional flux by the\nlong-range excitation of atom pairs to an attractive molecular potential. For\nlarger detunings and short delays, we find that a leading pulse can suppress\nthe rate of collisions caused by a following pulse. This is due to a depletion\nof short-range atom pairs by the earlier pulse. Comparison of our data to\nclassical Monte-Carlo simulations of the collisions yields reasonable\nagreement.",
"arxiv_id": "physics/0611003",
"authors": [
"M. J. Wright",
"J. A. Pechkis",
"J. L. Carini",
"P. L. Gould"
],
"categories": [
"physics.atom-ph"
],
"doi": "10.1103/PhysRevA.74.063402",
"title": "Probing Ultracold Collisional Dynamics with Frequency-Chirped Pulses",
"url": "https://arxiv.org/abs/physics/0611003"
},
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