Work

Realization of a Fast Triple-Magic All-Optical Qutrit in Sr 88

Year: 2025

Type: article

Abstract: The optical clock states of alkaline earth and alkaline earthlike atoms are the fundament of state-of-the-art optical atomic clocks. An important prerequisite for the operation of optical clocks is the magic trapping conditions where electronic and motional dynamics decouple. Here, we identify and experimentally demonstrate simultaneous magic trapping for two clock transitions in ^{88}Sr, realizing so-called triple-magic conditions at a specially chosen magic angle. Under these conditions, we operate an all-optical qutrit comprising the ground state ^{1}S_{0}, and the two metastable clock states ^{3}P_{0} and ^{3}P_{2}. We demonstrate fast optical control in an atom array using two- and three-photon couplings to realize high-fidelity manipulation between all qutrit states. At the magic angle, we probe the coherence achievable in magic-angle-tuned traps and find atom-atom coherence times between the metastable states as long as 715(30) ms. Our work opens several new directions, including qutrit-based quantum metrology on optical transitions and high-fidelity and high-coherence manipulation on the ^{88}Sr fine-structure qubit.

Source: Physical Review Letters

DOI: 10.1103/4kdl-xcwz

Authors: Maximilian Ammenwerth, Hendrik Timme, Flavien Gyger, Renhao Tao, Immanuel Bloch, Johannes Zeiher

Institutions: Max Planck Institute of Quantum Optics, Munich Center for Quantum Science and Technology, Ludwig-Maximilians-Universität München

Language: Latvian

Topic: Advanced Frequency and Time Standards

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,750