A high-resolution molecular spin-photon interface at telecommunications wavelengths

• URL: http://arxiv.org/abs/2505.17195v1
• Date: Thu, 22 May 2025 18:04:33 GMT
• Title: A high-resolution molecular spin-photon interface at telecommunications wavelengths
• Authors: Leah R. Weiss, Grant T. Smith, Ryan A. Murphy, Bahman Golesorkhi, José A. Méndez Méndez, Priya Patel, Jens Niklas, Oleg G. Poluektov, Jeffrey R. Long, David D. Awschalom,
• Abstract summary: We introduce an organo-erbium spin qubit in which narrow (MHz-scale) optical and spin transitions couple to provide high-resolution access to spin degrees of freedom with telecommunications frequency light.<n>This spin-photon interface enables demonstration of optical spin polarization and readout that distinguishes between spin states and magnetically in sites in a molecular crystal.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Optically addressable electronic spins in polyatomic molecules are a promising platform for quantum information science with the potential to enable scalable qubit design and integration through atomistic tunability and nanoscale localization. However, optical state- and site-selection are an open challenge. Here we introduce an organo-erbium spin qubit in which narrow (MHz-scale) optical and spin transitions couple to provide high-resolution access to spin degrees of freedom with telecommunications frequency light. This spin-photon interface enables demonstration of optical spin polarization and readout that distinguishes between spin states and magnetically inequivalent sites in a molecular crystal. Operation at frequencies compatible with mature photonic and microwave devices opens a path for engineering scalable, integrated molecular spin-optical quantum technologies.

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