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Updated: May 24, 2025

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
Observation of the Two-Photon Landau-Zener-Stückelberg-Majorana Effect
Isak Björkman1, Marko Kuzmanović1, Gheorghe Sorin Paraoanu1
1Aalto University, InstituteQ and QTF Centre of Excellence, Department of Applied Physics, School of Science, FI-00076 Aalto, Finland.
Abstract:
Harnessing second-order processes enables new control schemes in quantum dynamics. We show that the Landau-Zener-Stückelberg-Majorana (LZSM) transition can be generalized to a virtual-state process in a three-level system, employing a phase modulated drive whereby two photons excite the system from the first to the third level while avoiding the second one. We implement experimentally this process in a transmon, achieving 98% population transfer. We predict and observe the doubling of LZSM velocity. Furthermore, we demonstrate robustness to amplitude and frequency offsets, made possible by the nearly exact cancellation of the two-photon ac Stark shift due to the presence of the fourth state.
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