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Preparation of an ultra-cold sample of ammonia molecules for precision measurements

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arxiv 1405.2751 v1 pith:ITJ4577F submitted 2014-05-12 physics.chem-ph physics.atom-ph

Preparation of an ultra-cold sample of ammonia molecules for precision measurements

classification physics.chem-ph physics.atom-ph
keywords moleculestimeadiabaticammoniaexpansionprecisionrecapturedsample
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We present experiments in which an ultra-cold sample of ammonia molecules is released from an electrostatic trap and recaptured after a variable time. It is shown that, by performing adiabatic cooling before releasing the molecules and adiabatic re-compression after they are recaptured, we are able to observe molecules even after more than 10 ms of free expansion. A coherent measurement performed during this time will have a statistical uncertainty that decreases approximately as the inverse of the square root of the expansion time. This offers interesting prospects for high-resolution spectroscopy and precision tests of fundamental physics theories.

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