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Scalability of parametric down-conversion for generating higher-order Fock states

Johannes Tiedau, Tim J. Bartley, Georg Harder, Adriana E. Lita, Sae Woo Nam, Thomas Gerrits, and Christine Silberhorn
Phys. Rev. A 100, 041802(R) – Published 18 October 2019
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Abstract

Spontaneous parametric down-conversion (SPDC) is the most widely used method to generate higher-order Fock states (n2). Yet, a consistent performance analysis from fundamental principles is missing. Here, we address this problem by introducing a framework for state fidelity and generation probability under the consideration of losses and multimode emission. With this analysis we show the fundamental limitations of this process as well as a trade-off between state fidelity and generation rate intrinsic to the probabilistic nature of the process. This identifies the parameter space for which SPDC is useful when generating higher-order Fock states for quantum applications. We experimentally investigate the multiphoton regime of SPDC and demonstrate heralded Fock states up to |n=4.

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  • Received 11 January 2019

DOI:https://doi.org/10.1103/PhysRevA.100.041802

©2019 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Johannes Tiedau1,*, Tim J. Bartley1, Georg Harder1, Adriana E. Lita2, Sae Woo Nam2, Thomas Gerrits2, and Christine Silberhorn1

  • 1Integrated Quantum Optics Group, Applied Physics, University of Paderborn, 33098 Paderborn, Germany
  • 2National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA

  • *johannes.tiedau@uni-paderborn.de

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Issue

Vol. 100, Iss. 4 — October 2019

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