Quantum optics

The transferring of a single-photon excitation by a mediator

A. M. Basharov^a, A. I. Trubilko<sup>b

a</sup> National Research Centre "Kurchatov Institute", Moscow
^b Saint-Petersburg University of State Fire Service of Emercom of Russia

Abstract: The paper discusses the possibility of transferring the state of a single-photon excitation by a mediator during two oscillators' nonresonance interaction. The single-photon excitation is a broadband packet that nonresonantly affects the mediator oscillator. The packet's central frequency is resonant with that of the other isolated oscillator, to which the excitation is transferred. Under these circumstances the single-photon packet is modeled by a broadband single-photon thermostat. In the process of oscillators' nonresonance interaction the observed effect has been shown to be described by a kinetic equation obtained within the Markov approximation based on algebraic resonance perturbation theory. It is also shown that the case of excitation transfer to an oscillator is possible, which distinguishes the case of an oscillator from the transfer of excitation to an atom. The statistics of the transferred excitation is defined.

Keywords: single-photon packet, transferring the state, isolated oscillator, mediator oscillator.

Received: 24.03.2025
Revised: 24.03.2025
Accepted: 24.10.2025

DOI: 10.61011/OS.2025.10.61952.7721-25