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Photonics North (PN)

Deterministic Photon Subtraction in a Chiral Waveguide QED Platform

Abdolreza Pasharavesh, Supratik Sarkar, Sai Sreesh Venuturumilli, Michal Bajcsy

Published Jun 1, 2026• 0 citations
Publisher
DOI
10.1109/pn70808.2026.11657729

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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.
We conduct a photon transport analysis on a deterministic photon subtractor utilizing single-photon Raman interaction with a three-level Λ-type atom inside a waveguide-coupled bimodal cavity. By incorporating parameters from an existing experimental cavity QED platform, we demonstrate that the photon subtractor can achieve success probabilities approaching unity. In the second part, we demonstrate a potential application of deterministic photon subtraction for generating non-classical light, specifically enabling the creation of multi-photon Fock states that can be utilized in quantum metrology at the Heisenberg limit. The results highlight the potential of deterministic photon subtraction for advancing the development of high-efficiency non-classical light sources.