Speaker
Description
We experimentally demonstrate transitions between electronic angular momentum states with a difference in magnetic quantum numbers $\Delta m_J$ = 3, 4, and 5 via resonant four- and six-photon stimulated Raman transitions in a single trapped atom. Derivation of the corresponding Rabi frequencies, which are verified experimentally, follows the standard treatment of two-photon transitions including the adiabatic elimination of intermediate states. We demonstrate a four-photon transfer fidelity of 96(1)% and discuss pathways to increase the observed multi-photon transition fidelities to >99.99%, providing a tool for efficient, high-fidelity control of qudits and single-atom logical qubits. Additionally, we measure ac Stark shifts up to eighth order in perturbation theory and speculate on potential applications to driving a two-qubit “light-shift” entangling gate on clock qubits and reducing crosstalk in individually-addressed qubit arrays.
| Academic level | PhD student |
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