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- Supratik Sarkar1,2 na1,
- Sai Sreesh Venuturumilli1,2,
- Golam Bappi1,2,
- Jinjin Du1,2 &
- …
- Michal Bajcsy1,2
npj Quantum Information (2026) Cite this article
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Abstract
We propose a scheme for deterministic single photon subtraction based on Single Photon Raman Interaction (SPRINT) with a three-level quantum emitter coupled to a chiral waveguide and present an analytical and numerical study of its feasibility. We show that single photon subtraction probability for pulsed input light in a coherent or a Fock state can approach unity in the ideal limit and discuss the potential of various reported quantum emitter-waveguide platforms as candidates for experimental realization of our scheme. The use of chiral slow-light photonic crystal waveguides coupled to Λ-type emitters can perform efficient photon subtraction. While integrating cold atoms to such systems remains technically challenging, solid-state emitters offer a potentially practical path to realize such photon subtraction.
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This research was undertaken thanks in part to funding from the Canada First Research Excellence Fund Transformative Quantum Technologies program (CFREF-TQT).
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Pasharavesh, A., Sarkar, S., Venuturumilli, S.S. et al. Photon subtraction using a three-level emitter coupled to a chiral waveguide. npj Quantum Inf (2026). https://doi.org/10.1038/s41534-026-01338-4
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DOI: https://doi.org/10.1038/s41534-026-01338-4