Deterministic Control of Photon-Number Probabilities via Phase-Controlled Quantum Interference

• URL: http://arxiv.org/abs/2508.15352v1
• Date: Thu, 21 Aug 2025 08:32:03 GMT
• Title: Deterministic Control of Photon-Number Probabilities via Phase-Controlled Quantum Interference
• Authors: Sang Kyu Kim, Eduardo Zubizarreta Casalengua, Yeji Sim, Friedrich Sbresny, Carolin Calcagno, Hubert Riedl, Jonathan J. Finley, Elena del Valle, Carlos Antón-Solanas, Kai Müller, Lukas Hanschke,
• Abstract summary: We report an all-linear-optical protocol that converts a single-photon emitter into a deterministic generator of vacuum--single-photon--two-photon states.<n>A fully quantum-mechanical, discrete time-bin model maps these results onto the tailored photon statistics.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Deterministically tailoring optical Fock states beyond the single-photon level is crucial for boson sampling, loss-tolerant photonic qubits, and quantum-enhanced sensing, however has yet remained elusive. Here, we report an all-linear-optical protocol that converts a resonantly driven single-photon emitter into a deterministic generator of vacuum--single-photon--two-photon states. A phase-stabilized, path-unbalanced Mach-Zehnder interferometer combines vacuum--single-photon interference and Hong-Ou-Mandel effect, providing two knobs to shape photon-number probabilities. By tuning these knobs, we observe a dynamic transition from antibunching to strong bunching in correlation measurements. A fully quantum-mechanical, discrete time-bin model maps these results onto the tailored photon statistics. The same framework predicts that two indistinguishable emitters would extend the accessible space to deterministic NOON states and single-photon filtering. This protocol relying on linear optics and available single-photon sources provides a scalable, chip-compatible, and platform-independent route to on-demand and deterministic few-photon resources for quantum metrology, photonic computing, as well as long-distance quantum networks.

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