We apply input-output theory with quantum pulses [AH Kiilerich, K M\o lmer, Phys. Rev. Lett. {\bf 123}, 123604 (2019)] to a model of a new type of two-photon detector consisting of one molecule that can detect two photons arriving sequentially in time. The underlying process is distinct from the usual two-photon absorption process where two photons arriving simultaneously and with frequencies adding up to the resonance frequency are absorbed by a single molecule in one quantum jump. Our detector model includes a Hamiltonian description of the amplification process necessary to convert the microscopic change in the single molecule to a macroscopic signal.
@article{arxiv.2108.00498,
title = {Detecting two photons with one molecule},
author = {Saumya Biswas and S. J. van Enk},
journal= {arXiv preprint arXiv:2108.00498},
year = {2021}
}
Comments
14 pages, 9 figures, minor changes in response to referee comments. To appear in Phys. Rev. A