Multiphoton-scattering theory and generalized master equations

By T. Shi, Darrick E. Chang, J. I. Cirac. 2015

149 citations recorded by the source corpus.

We develop a scattering theory to investigate the multi-photon transmission in a one-dimensional waveguide in the presence of quantum emitters. It is based on a path integral formalism, uses displacement transformations, and does not require the Markov approximation. We obtain the full time-evolution of the global system, including the emitters and the photonic field. Our theory allows us to compute the transition amplitude between arbitrary initial and final states, as well as the S-matrix of the asymptotic in- and out- states. For the case of few incident photons in the waveguide, we also re-derive a generalized master equation in the Markov limit. We compare the predictions of the developed scattering theory and that with the Markov approximation. We illustrate our methods with five examples of few-photon scattering: (i) by a two-level emitter, (ii) in the Jaynes-Cummings model; (iii) by an array of two-level emitters; (iv) by a two-level emitter in the half-end waveguide; (v) by an array of atoms coupled to Rydberg levels. In the first two, we show the application of the scattering theory in the photon scattering by a single emitter, and examine the correctness of our theory with the well-known results. In the third example, we analyze the condition of the Markov approximation for the photon scattering in the array of emitters. In the forth one, we show how a quantum emitter can generate entanglement of out-going photons. Finally, we highlight the interplay between the phenomenon of electromagnetic-induced transparency and the Rydberg interaction, and show how this results in a rich variety of possibilities in the quantum statistics of the scattering photons.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/22b8a16a04f1ca8cd65344477775ceda1f65d9e5

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In Atomic and Molecular Physics, and Optics

Citations in the corpus

Microwave photonics with superconducting quantum circuits (2017, background): “Transport of one [612, 673, 677, 687, 689, 692], two [279, 677, 683, 689, 700], and more photons [581, 672, 684, 700], as well as coherent light [612, 695, 696], has been studied, usually including calculations of g((2))(τ) [612, 677, 683, 695, 700], but makes up a smaller part of the total body of ”
Exponential Improvement in Photon Storage Fidelities Using Subradiance and “Selective Radiance” in Atomic Arrays (2017, background): “First, the retardation arising from the physical distance between atoms can be ignored [51, 52].”