Speaker
Description
Photon addition and subtraction are essential non-Gaussian processes in quantum optics, where conventional methods rely on the use of linear optics and number-resolving detection often suffer from low success probability. Here, we introduce the concept of dynamic stimulated emission, whereby a quantum emitter undergoes stimulated emission with a time-dependent coupling. We show that, for both two- and three-level emitters, the scattering dynamics mimic that of a single-mode Jaynes-Cummings interaction. This Jaynes-Cummings-like process can be used to deterministically add or subtract a photon while preserving a single propagating optical mode, a feature that is highly attractive for photonic quantum information processing. We provide semi-analytic solutions to this problem for Fock states, enabling deterministic and unconditional single-photon subtraction and addition with fidelity F > 0.996. Our semi-analytic solutions are provided for both dynamically coupled two-level systems and for three-level systems whose dynamical coupling is controlled by a coherent laser drive.
Moving beyond individual Fock states, we further showcase the ability to subtract and add single photons to photon-number superposition states. We show that Schr\"odinger cat states can be prepared from squeezed vacuum input via cascaded subtraction or cascaded addition. Finally, we show that our photon-addition process can be used to add a photon to any squeezed and displaced state with high success probability and fidelity F > 0.99, thereby potentially converting quantum emitters from single-photon sources to sources of single-photon-added Gaussian states without the need for inline squeezing. Our protocols provide a path towards integrating quantum emitters to construct efficient sources of single-mode non-Gaussian light beyond single photons. Arxiv reference for the paper: arXiv:2512.09711
| I am the presenting author | Yes |
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