TY - JOUR

T1 - Trapping, shaping, and isolating of an ion Coulomb crystal via state-selective optical potentials

AU - Weckesser, Pascal

AU - Thielemann, Fabian

AU - Hoenig, Daniel

AU - Lambrecht, Alexander

AU - Karpa, Leon

AU - Schaetz, Tobias

N1 - Funding Information: This project has received funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (Grant No. 648330) and was supported by the Georg H. Endress foundation. P.W., F.T., and T.S. acknowledge support from the Deutsche Forschungsgemeinschaft (DFG) within the GRK 2079/1 program. P.W. gratefully acknowledges financial support from the Studienstiftung des deutschen Volkes. We are grateful for M. Debatin helping build the experimental setup. We further thank J. Schmidt and D. Leibfried for fruitful discussions and T. Walker for constructive criticism of the manuscript.

PY - 2021/1

Y1 - 2021/1

N2 - 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 Ba+138 ions stored within two distinctive traps operating at 532 and 1064 nm. We prepare the ions in either the electronic ground (6S1/2) or one of the metastable excited states (5D3/2 or 5D5/2) 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.

AB - 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 Ba+138 ions stored within two distinctive traps operating at 532 and 1064 nm. We prepare the ions in either the electronic ground (6S1/2) or one of the metastable excited states (5D3/2 or 5D5/2) 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.

UR - http://www.scopus.com/inward/record.url?scp=85099783543&partnerID=8YFLogxK

U2 - 10.48550/arXiv.2010.13621

DO - 10.48550/arXiv.2010.13621

M3 - Article

AN - SCOPUS:85099783543

VL - 103

JO - Physical Review A

JF - Physical Review A

SN - 2469-9926

IS - 1

M1 - 013112

ER -