Robust biexciton preparation for entangled photon-pair generation by single-shot Floquet driving
Quantum emitters driven by resonant two-photon excitation are a leading source for deterministically generated entangled photon pairs, essential for scalable photonic quantum technologies. However, conventional excitation schemes pose various constraints, limiting their scalability and practicability. Here, we demonstrate how biexciton preparation schemes with significantly improved robustness and reduced experimental demands can be identified using a novel design principle: ultrafast single-shot Floquet driving. This is achieved by employing two strongly and symmetrically detuned pulses, whose superposition generates a stroboscopic Hamiltonian that enables direct coupling between ground and biexciton states. Moreover, a pulse delay serves as a tuning knob, introducing an effective magnetic field making biexciton preparation particularly robust. Experimentally, we achieve a biexciton occupation exceeding 96% and preserve photon-pair entanglement with a fidelity of 93.4%. Our work opens avenues for the design of quantum control protocols with superior performance across diverse quantum emitters and qubit platforms.
Authors
- Paul C. A. Hagen (ORCID: https://orcid.org/0009-0003-9669-9097)
- Wei E. I. Sha (ORCID: https://orcid.org/0000-0002-7431-8121)
- Arne Ludwig (ORCID: https://orcid.org/0000-0002-2871-7789)
- Andreas D. Wieck (ORCID: https://orcid.org/0000-0001-9776-2922)
- Hans-Georg Babin
- Jun-Yong Yan (ORCID: https://orcid.org/0000-0001-5624-2322)
- Chao‐Yuan Jin (ORCID: https://orcid.org/0000-0003-2656-2397)
- Moritz Cygorek (ORCID: https://orcid.org/0000-0003-4406-851X)
- V. M. Axt
- Feng Liu (ORCID: https://orcid.org/0000-0002-2082-7561)
- Da‐Wei Wang (ORCID: https://orcid.org/0000-0003-3336-8568)
- Zhi-Hua Gan
- Bo Wang
- Fang-Yuan Li
- Hang-Yu Ge
Institutions
- National University of Singapore (SG)
- Zhejiang University of Science and Technology (CN)
- TU Dortmund University (DE)
- Institute of Refrigeration (GB)
- Hangzhou City University
- University of Bayreuth (DE)
- Zhejiang University (CN)
- Ruhr University Bochum (DE)
Publication Details
- Journal
- Nature Communications
- Published
- 2026-09-12
- DOI
- https://doi.org/10.1038/s41467-026-77221-9
- Primary Topic
- Quantum Information and Cryptography
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Supercomputer Centre in Guangzhou
- Deutsche Forschungsgemeinschaft
- National Natural Science Foundation of China
- Bundesministerium für Bildung und Forschung
- Zhejiang University
- QuantERA
- National Key Research and Development Program of China
- Natural Science Foundation of Zhejiang Province