Observation of the Two-Photon Landau-Zener-Stückelberg-Majorana Effect
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.
- Publication:
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Physical Review Letters
- Pub Date:
- February 2025
- DOI:
- arXiv:
- arXiv:2402.10833
- Bibcode:
- 2025PhRvL.134f0602B
- Keywords:
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- Quantum Information;
- Science;
- and Technology;
- Quantum Physics;
- Condensed Matter - Other Condensed Matter