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  • Letter
  • Open Access

Broadband detection of 18 teeth in an 11-dB squeezing comb

Dennis Wilken1,2,*, Jonas Junker1,2,3, and Michèle Heurs1

  • 1Institute for Gravitational Physics, Leibniz University Hannover, D-30167 Hannover, Germany
  • 2Max Planck Institute for Gravitational Physics (Albert Einstein Institute), D-30167 Hannover, Germany
  • 3OzGrav, Centre for Gravitational Astrophysics, Research School of Physics & Research School of Astronomy and Astrophysics, Australian National University, Canberra, ACT, Australia

  • *dennis.wilken@aei.uni-hannover.de
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Phys. Rev. Applied 21, L031002 – Published 4 March, 2024

DOI: https://doi.org/10.1103/PhysRevApplied.21.L031002

Abstract

Squeezed vacuum is a versatile resource of bipartite entanglement for quantum metrology and information. Optical parametric oscillators generate these states in a frequency comb structure. We show the simultaneous detection of 18 teeth with 11 dB of squeezing each. We built a 1.5-m-long optical resonator to increase the spectral teeth density and significantly increase the detection bandwidth by employing unbalanced homodyne detection instead of balanced. Our approach can be a crucial step in using the scaling potential of high-frequency squeezed states in quantum information.

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Outline

Information

Phys. Rev. Applied 21, L031002– Published 4 March, 2024
  • Received 14 July 2023
  • Revised 31 January 2024
  • Accepted 2 February 2024
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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. Open access publication funded by the Max Planck Society.

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