Four- and six-photon stimulated Raman transitions for coherent qubit and qudit operations
Abstract
We experimentally demonstrate transitions between electronic angular momentum states with a difference in magnetic quantum numbers mJ = 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. Finally, we 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.
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