Measurement-feedback control of the chiral photon emission from an atom chain into a nanofiber

Buonaiuto, Giuseppe; Lesanovsky, Igor; Olmos, Beatriz

Abstract

We theoretically investigate measurement-based feedback control of a laser-driven one-dimensional atomic chain interfaced with a nanofiber. The interfacing leads to all-to-all interactions among the atomic emitters and induces chirality, i.e. the directional emission of photons into a preferred guided mode of the nanofiber. In the setting we consider, the measurement of guided light-conducted either by photon counting or through homodyne detection of the photocurrent quadratures-is fed back into the system through a modulation of the driving laser field. We investigate how this feedback scheme allows to control the statistics of the photon counting and the quadratures of the light, as well as the many-body state of the atom chain. In particular, we identify regimes where both the photon counting rate and its fluctuations are dramatically enhanced. Moreover, we find that the action of homodyne detection feedback allows to alter the stationary state of the chain from a pure, dimer state, to a fully mixed one. Our results provide some insights on how to control and engineer dynamics in light-matter networks realizable with state-of-the-art experimental setups.

Citation

Buonaiuto, G., Lesanovsky, I., & Olmos, B. (2021). Measurement-feedback control of the chiral photon emission from an atom chain into a nanofiber. Journal of the Optical Society of America B, 38(5), 1470-1476. https://doi.org/10.1364/josab.422893

• Journal Article Type: Article
• Acceptance Date: Mar 16, 2021
• Online Publication Date: Apr 12, 2021
• Publication Date: May 1, 2021
• Deposit Date: Mar 18, 2021
• Publicly Available Date: Apr 13, 2022
• Journal: Journal of the Optical Society of America B
• Print ISSN: 0740-3224
• Electronic ISSN: 1520-8540
• Publisher: Optical Society of America
• Peer Reviewed: Peer Reviewed
• Volume: 38
• Issue: 5
• Pages: 1470-1476
• DOI: https://doi.org/10.1364/josab.422893
• Keywords: Atomic and Molecular Physics, and Optics; Statistical and Nonlinear Physics
• Public URL: https://nottingham-repository.worktribe.com/output/5401770
• Publisher URL: https://www.osapublishing.org/josab/abstract.cfm?uri=josab-38-5-1470
• Additional Information: © 2021 Optical Society of America]. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modifications of the content of this paper are prohibited.