Robust polarization gradient cooling of trapped ions

dc.contributor.authorLi, Wenbing
dc.contributor.authorWolf, Sebastian
dc.contributor.authorKlein, Lukas
dc.contributor.authorBudker, Dmitry
dc.contributor.authorDüllmann, Christoph E.
dc.contributor.authorSchmidt-Kaler, Ferdinand
dc.date.accessioned2024-02-06T15:39:57Z
dc.date.available2024-02-06T15:39:57Z
dc.date.issued2022
dc.date.updated2023-10-17T18:59:30Z
dc.description.abstractWe implement three-dimensional polarization gradient cooling (PGC) of trapped ions. Counter-propagating laser beams near 393 nm impinge in lin ⊥ lin configuration, at a frequency below the S1/2 to P3/2 resonance in 40Ca+. Our measurements demonstrate that cooling with laser beams detuned to lower frequencies from the resonance is robust against an elevated phonon occupation number and works continuously in the crossover from regular Doppler cooling to detunings of tens of linewidths. It is thus robust against heating events and also works well for an initial ion motion far out of the Lamb–Dicke regime. We show that PGC performance strongly depends on residual micromotion (MM) and find PGC working for a MM modulation index β ⩽ 0.1. Still, we find that the spectral impurity of the laser field affects both, cooling rates and cooling limits. Thus, a Fabry–Pérot cavity filter is employed to efficiently suppress amplified spontaneous emission of the diode laser. We demonstrate mean phonon numbers for a single ion of 5.4(4) at a trap frequency of 2π × 285 kHz and 3.3(4) at 2π × 480 kHz, in the axial and radial directions, respectively.en_GB
dc.identifier.doihttp://doi.org/10.25358/openscience-10060
dc.identifier.urihttps://openscience.ub.uni-mainz.de/handle/20.500.12030/10078
dc.language.isoengde
dc.rightsCC-BY-4.0*
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/*
dc.subject.ddc530 Physikde_DE
dc.subject.ddc530 Physicsen_GB
dc.titleRobust polarization gradient cooling of trapped ionsen_GB
dc.typeZeitschriftenaufsatzde
elements.object.id152655
elements.object.labelstrapped ions
elements.object.labelslaser cooling
elements.object.labelssub-Doppler cooing
elements.object.labelspolarization gradient cooling
elements.object.labels02 Physical Sciences
elements.object.labelsFluids & Plasmas
elements.object.labels51 Physical sciences
elements.object.typejournal-article
jgu.journal.issue4de
jgu.journal.titleNew journal of physicsde
jgu.journal.volume24de
jgu.organisation.departmentFB 08 Physik, Mathematik u. Informatikde
jgu.organisation.departmentHelmholtz Institut Mainzde
jgu.organisation.nameJohannes Gutenberg-Universität Mainz
jgu.organisation.number7940
jgu.organisation.number9050
jgu.organisation.placeMainz
jgu.organisation.rorhttps://ror.org/023b0x485
jgu.pages.alternative043028de
jgu.publisher.doi10.1088/1367-2630/ac6233de
jgu.publisher.issn1367-2630de
jgu.publisher.nameIOPde
jgu.publisher.placeLondonde
jgu.publisher.year2022
jgu.rights.accessrightsopenAccess
jgu.subject.ddccode530de
jgu.subject.dfgNaturwissenschaftende
jgu.type.contenttypeScientific articlede
jgu.type.dinitypeArticleen_GB
jgu.type.resourceTextde
jgu.type.versionPublished versionde

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