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Coincidence Correlation and Counting

A key method for single photon based quantum technologies


Photon coincidence detection, coincidence correlation and coincidence counting are fundamental methods in optical quantum technologies. Typical examples are Hanbury-Brown-Twiss set-ups to study single photon sources, quantum communication and quantum key distribution (QKD), the study of entanglement using Hong-Ou Mandel (HOM) set-ups,
Bell state measurements, or experiments on quantum gates towards the development of quantum computers. Time-tagging devices from PicoQuant are ideal for such applications, as they record absolute signal arrival times on several detection channels in parallel.

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General scheme

Coincidence counting
Coincidence correlation

Typical set-ups and results


Time taggers and software

Quantum Symposium

PicoQuant organizes the annual International Symposium on "Single Photon based Quantum Technologies". It provides an interdisciplinary platform for the exchange of experience and information as well as sharing recent findings in the field of single photon based quantum technologies.

Next symposium: May 27-29, 2020 in Berlin, Germany.

Symposium website: Quantum Symposium


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