Related papers: Trapping, Shaping and Isolating of Ion Coulomb Crystals via State-selective Optical Potentials

Trapping, Shaping and Isolating of Ion Coulomb Crystals via State-selective Optical Potentials

URL: http://arxiv.org/abs/2010.13621v1
Date: Mon, 26 Oct 2020 14:36:48 GMT
Title: Trapping, Shaping and Isolating of Ion Coulomb Crystals via State-selective Optical Potentials
Authors: Pascal Weckesser, Fabian Thielemann, Daniel Hoenig, Alexander Lambrecht, Leon Karpa and Tobias Schaetz
Abstract summary: In conventional ion traps, the trapping potential is close to independent of the electronic state, providing confinement for ions dependent on their charge-to-mass ratio $Q/m$. Here we experimentally study optical dipole potentials for $138mathrmBa+$ ions stored within two distinctive traps operating at 532 nm and 1064 nm.
Score: 55.41644538483948
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: For conventional ion traps, the trapping potential is close to independent of the electronic state, providing confinement for ions dependent primarily on their charge-to-mass ratio $Q/m$. In contrast, storing ions within an optical dipole trap results in state-dependent confinement. Here we experimentally study optical dipole potentials for $^{138}\mathrm{Ba}^+$ ions stored within two distinctive traps operating at 532 nm and 1064 nm. We prepare the ions in either the $6\mathrm{S}_{\mathrm{1/2}}$ electronic ground or the $5\mathrm{D}_{\mathrm{3/2}}$/ $5\mathrm{D}_{\mathrm{5/2}}$ metastable excited state and probe the relative strength and polarity of the potential. On the one hand, we apply our findings to selectively remove ions from a Coulomb crystal, despite all ions sharing the same $Q/m$. On the other hand, we deterministically purify the trapping volume from parasitic ions in higher-energy orbits, resulting in reliable isolation of Coulomb crystals down to a single ion within a radio-frequency trap.

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