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  • Open Access

Limitations of entangled two-photon absorption detection

R. Pollmann*, F. Roeder, C. Silberhorn, and B. Brecht

  • *Contact author: Rene.Pollmann@upb.de
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Phys. Rev. A 114, 013718 – Published 23 July, 2026

DOI: https://doi.org/10.1103/qpb1-hk5l

Abstract

We introduce a method for determining the sensitivity of any given entangled two-photon absorption (ETPA) measurement. By modeling all signal and noise contributions to the measurement, we derive a single numerical value that describes the sensitivity of the ETPA measurement in Göppert-Mayer units. This allows us to directly compare vastly different experimental approaches and determine whether ETPA will be detectable under the given conditions. Therefore we can quantify the effect of any change to a given experimental apparatus and identify the ideal optimization pathway.

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Phys. Rev. A 114, 013718– Published 23 July, 2026
  • Received 22 December 2025
  • Accepted 26 June 2026
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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.

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