Quantum interferences and gates with emitter-based coherent photon sources

Optica Quantum, vol. 2, pp. 404

Abstract

Quantum emitters such as quantum dots, defects in diamond or in silicon have emerged as efficient single-photon sources that are progressively exploited in quantum technologies. In 2019, it was shown that the emitted single-photon states often include coherence with the vacuum component. Here we investigate how such photon-number coherence alters quantum interference experiments that are routinely implemented both for characterizing or exploiting the generated photons. We show that it strongly modifies intensity correlation measurements in a Hong–Ou–Mandel experiment and leads to errors in indistinguishability estimations. It also results in additional entanglement when performing partial measurements. We illustrate the impact on quantum protocols by evidencing modifications in heralding efficiency and fidelity of two-qubit gates.

Authors 13

1. Ilse Maillette de Buy Wenniger

   Centre de Nanosciences et de Nanotechnologies

   Affiliation as printed

   Centre for Nanosciences and Nanotechnology

2. Stephen C. Wein

   Quandela (France) · Institut Néel

   Affiliation as printed

   Quandela SAS

   NEEL - NPSC - Nanophysique et Semiconducteurs (Institut NEEL, 25 rue des Martyrs, BP 166, 38042 Grenoble cedex 9 - France)

3. D. Fioretto

   Centre de Nanosciences et de Nanotechnologies · Quandela (France)

   Affiliation as printed

   C2N - Centre de Nanosciences et de Nanotechnologies (10 Boulevard Thomas Gobert, 91120, Palaiseau - France)

   Quandela SAS (France)

4. Sarah E. Thomas

   Centre de Nanosciences et de Nanotechnologies

   Affiliation as printed

   C2N - Centre de Nanosciences et de Nanotechnologies (10 Boulevard Thomas Gobert, 91120, Palaiseau - France)

5. C. Antón

   Laboratoire Photonique, Numérique et Nanosciences · Universidad Autónoma de Madrid

   Affiliation as printed

   Universidad Autónoma de Madrid

   LPN - Laboratoire de photonique et de nanostructures (Route de Nozay 91460 MARCOUSSIS - France)

6. Aristide Lemaître

   Centre de Nanosciences et de Nanotechnologies

   Affiliation as printed

   Centre for Nanosciences and Nanotechnology

   C2N - Centre de Nanosciences et de Nanotechnologies (10 Boulevard Thomas Gobert, 91120, Palaiseau - France)

7. Isabelle Sagnes

   Centre de Nanosciences et de Nanotechnologies

   Affiliation as printed

   Centre for Nanosciences and Nanotechnology

   C2N - Centre de Nanosciences et de Nanotechnologies (10 Boulevard Thomas Gobert, 91120, Palaiseau - France)

8. Abdelmounaïm Harouri

   Centre de Nanosciences et de Nanotechnologies

   Affiliation as printed

   Centre for Nanosciences and Nanotechnology

   C2N - Centre de Nanosciences et de Nanotechnologies (10 Boulevard Thomas Gobert, 91120, Palaiseau - France)

9. Nadia Belabas

   Centre de Nanosciences et de Nanotechnologies

   Affiliation as printed

   Centre for Nanosciences and Nanotechnology

   C2N - Centre de Nanosciences et de Nanotechnologies (10 Boulevard Thomas Gobert, 91120, Palaiseau - France)

10. Niccolò Somaschi

    Quandela (France)

    Affiliation as printed

    Quandela SAS

    Quandela SAS (France)

11. Paul Hilaire Aachen

    Leiden University · Quandela (France)

    Affiliation as printed

    Quandela SAS

    Universiteit Leiden = Leiden University (Leiden University | 2300 RA Leiden The Netherlands - Netherlands)

12. Jean Sénellart

    Quandela (France)

    Affiliation as printed

    Quandela SAS

13. P. Senellart

    Centre de Nanosciences et de Nanotechnologies · Quandela (France)

    Affiliation as printed

    Centre for Nanosciences and Nanotechnology

    Quandela SAS

    C2N - Centre de Nanosciences et de Nanotechnologies (10 Boulevard Thomas Gobert, 91120, Palaiseau - France)