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Open Quantum Systems Decoherence Quantum Chemistry

Magnetic-field dependent trap loss of ultracold metastable helium

arXiv
Authors: J. S. Borbely, R. van Rooij, S. Knoop, W. Vassen

Year

2011

Paper ID

29554

Status

Preprint

Abstract Read

~2 min

Abstract Words

105

Citations

N/A

Abstract

We have experimentally studied the magnetic-field dependence of the decay of a Bose-Einstein condensate of metastable 4He atoms confined in an optical dipole trap, for atoms in the m=+1 and m=-1 magnetic substates, and up to 450 G. Our measurements confirm long-standing calculations of the two-body loss rate coefficient that show an increase above 50 G. We demonstrate that for m=-1 atoms, decay is due to three-body recombination only, with a three-body loss rate coefficient of 6.5(0.4)(0.6)10^(-27)cm^6s^(-1), which is interesting in the context of universal few-body theory. We have also searched for a recently-predicted d-wave Feshbach resonance, but did not observe it.

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  • We have experimentally studied the magnetic-field dependence of the decay of a Bose-Einstein condensate of metastable 4He atoms confined in an optical dipole trap, for atoms in...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1111.5829 [2] arXiv https://arxiv.org/abs/1111.5829 [3] Publisher https://arxiv.org/abs/1111.5829

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