• Open Access

Purcell-enhanced dipolar interactions in nanostructures

A. Skljarow, H. Kübler, C. S. Adams, T. Pfau, R. Löw, and H. Alaeian
Phys. Rev. Research 4, 023073 – Published 26 April 2022

Abstract

Strong light-induced interactions between atoms are known to cause nonlinearities at a few-photon level, which are crucial for applications in quantum information processing. Compared to free space, the scattering and the light-induced dipolar interaction of atoms can be enhanced by a dielectric environment. For this Purcell effect, either a cavity or a waveguide can be used. Here, we combine the high densities achievable in thermal atomic vapors with an efficient coupling to a slot waveguide. In contrast to free-space interactions, atoms aligned within the slot exhibit repulsive interactions that are further enhanced by a factor of 8 due to the Purcell effect. The corresponding blueshift of the transition frequency of atoms arranged in the essentially one-dimensional geometry vanishes above the saturation, providing a controllable nonlinearity at the few-photon level. The experimental results are in good agreement with Monte Carlo simulations that include the dielectric environment, dipolar interactions, and motional effects. The results pave the way towards a robust scalable platform for quantum nonlinear optics and all-optical quantum information processing at room temperature.

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  • Received 24 January 2022
  • Accepted 12 April 2022

DOI:https://doi.org/10.1103/PhysRevResearch.4.023073

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

A. Skljarow1, H. Kübler1, C. S. Adams2, T. Pfau1, R. Löw1, and H. Alaeian3

  • 15. Physikalisches Institut and Center for Integrated Quantum Science and Technology, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany
  • 2Joint Quantum Center (JQC) Durham-Newcastle, Department of Physics, Durham University, South Road, Durham DH3LE, United Kingdom
  • 3Elmore Family School of Electrical & Computer Engineering, Department of Physics & Astronomy, Purdue Quantum Science & Engineering Institute, Purdue University, West Lafayette, Indiana 47907, USA

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Issue

Vol. 4, Iss. 2 — April - June 2022

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