Multi-second magnetic coherence in a single domain spinor Bose-Einstein condensate
Abstract
We describe a compact, robust and versatile system for studying magnetic dynamics in a spinor Bose-Einstein condensate. Condensates of 87 Rb are produced by all-optical evaporation in a 1560 nm optical dipole trap, using a non-standard loading sequence that employs an auxiliary 1529 nm beam for partial compensation of the strong differential light shift induced by the dipole trap itself. We use near-resonance Faraday rotation probing to non-destructively track the condensate magnetization, and demonstrate few-Larmor-cycle tracking with no detectable degradation of the spin polarization. In the ferromagnetic F = 1 ground state, we observe magnetic T1 and T2 coherence times limited only by the several-second residence time of the atoms in the trap.
Cite
@article{arxiv.1707.09607,
title = {Multi-second magnetic coherence in a single domain spinor Bose-Einstein condensate},
author = {Silvana Palacios and Simon Coop and Pau Gomez and Thomas Vanderbruggen and Y. Natali Martinez de Escobar and Martijn Jasperse and Morgan W. Mitchell},
journal= {arXiv preprint arXiv:1707.09607},
year = {2018}
}