Collection of fluorescence from an ion using trap-integrated photonics

• URL: http://arxiv.org/abs/2505.01412v1
• Date: Fri, 02 May 2025 17:42:20 GMT
• Title: Collection of fluorescence from an ion using trap-integrated photonics
• Authors: Felix W. Knollmann, Sabrina M. Corsetti, Ethan R. Clements, Reuel Swint, Aaron D. Leu, May E. Kim, Patrick T. Callahan, Dave Kharas, Thomas Mahony, Cheryl Sorace-Agaskar, Robert McConnell, Colin D. Bruzewicz, Isaac L. Chuang, Jelena Notaros, John Chiaverini,
• Abstract summary: Spontaneously emitted photons are entangled with the electronic and nuclear degrees of freedom of the emitting atom.<n>Current demonstrations rely on bulk photon-collection and manipulation optics that suffer from environment-induced phase instability.<n>We demonstrate a collection method that enables passive phase stability, straightforward photonic manipulation, and intrinsic stability.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Spontaneously emitted photons are entangled with the electronic and nuclear degrees of freedom of the emitting atom, so interference and measurement of these photons can entangle separate matter-based quantum systems as a resource for quantum information processing. However, the isotropic nature of spontaneous emission hinders the single-mode photonic operations required to generate entanglement. Current demonstrations rely on bulk photon-collection and manipulation optics that suffer from environment-induced phase instability, mode matching challenges, and system-to-system variability, factors that impede scaling to the large numbers of entangled pairs needed for quantum information processing. To address these limitations, we demonstrate a collection method that enables passive phase stability, straightforward photonic manipulation, and intrinsic reproducibility. Specifically, we engineer a waveguide-integrated grating to couple photons emitted from a trapped ion into a single optical mode within a microfabricated ion-trap chip. Using the integrated collection optic, we characterize the collection efficiency, image the ion, and detect the ion's quantum state. This proof-of-principle demonstration lays the foundation for leveraging the inherent stability and reproducibility of integrated photonics to efficiently create, manipulate, and measure multipartite quantum states in arrays of quantum emitters.

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