Deterministic cavity quantum electrodynamics with trapped ions
journal contributionposted on 2023-06-07, 14:28 authored by Matthias KellerMatthias Keller, B. Lange, Wolfgang Lange, H. Walther
We have employed radio-frequency trapping to localize a single 40Ca+-ion in a high-finesse optical cavity. By means of laser Doppler cooling, the position spread of the ion's wavefunction along the cavity axis was reduced to 42 nm, a fraction of the resonance wavelength of ionized calcium (? = 397 nm). By controlling the position of the ion in the optical field, continuous and completely deterministic coupling of ion and field was realized. The precise three-dimensional location of the ion in the cavity was measured by observing the fluorescent light emitted upon excitation in the cavity field. The single-ion system is ideally suited to implement cavity quantum electrodynamics under cw conditions. To this end we operate the cavity on the D3/2–P1/2 transition of 40Ca+ (? = 866 nm). Applications include the controlled generation of single-photon pulses with high efficiency and two-ion quantum gates.
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
PublisherInstitute of Physics
Department affiliated with
- Physics and Astronomy Publications
NotesThe paper demonstrates deterministic coupling of ions and photons. As principal scientist M.K. performed the largest share of experimental work and built important parts of the setup. W.L. was the leader of the team. The remaining authors' contributions were limited to the laser system (K.H., B.L.) and funding (H.W).
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