Quantum modulation of a coherent state with a single electron spin

Androvitsaneas, P. ORCID: https://orcid.org/0000-0001-5013-0282, Young, A. B., Nutz, T., Lennon, J. M., Mister, S., Schneider, C., Kamp, M., Höfling, S., McCutcheon, D. P. S., Harbord, E., Rarity, J. G. and Oulton, R. 2024. Quantum modulation of a coherent state with a single electron spin. Physical Review Research 6 (2) , 023276. 10.1103/physrevresearch.6.023276

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Abstract

The interaction of quantum objects lies at the heart of fundamental quantum physics and is key to a wide range of quantum information technologies. Photon-quantum-emitter interactions are among the most widely studied. Two-qubit interactions are generally simplified into two quantum objects in static well-defined states. In this work we explore a fundamentally new dynamic type of spin-photon interaction. We demonstrate the modulation of a coherent narrowband laser by a coherently evolving spin in the ground state of a quantum dot. What results is a quantum modulation of the output phase (either 0 or π but no values in between), and a new quantum state of light that cannot be described classically. Published by the American Physical Society 2024

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Schools > Engineering
Additional Information:	License information from Publisher: LICENSE 1: URL: https://creativecommons.org/licenses/by/4.0/, Start Date: 2024-06-14
Publisher:	American Physical Society
Date of First Compliant Deposit:	4 November 2024
Date of Acceptance:	7 February 2024
Last Modified:	04 Nov 2024 09:15
URI:	https://orca.cardiff.ac.uk/id/eprint/173625

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