Arbitrary configurable 20-channel coincidence counting unit for multi-qubit quantum experiment

Byung Kwon Park, Yong Su Kim, Young Wook Cho, Sung Moon, Sang Wook Han

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


This paper presents a 20-channel coincidence counting unit (CCU) using a low-end fieldprogrammable gate array (FPGA). The architecture of the CCU can be configured arbitrarily to measure from twofold to twentyfold coincidence counts thanks to a multifold controllable architecture, which can be easily manipulated by a graphical user interface (GUI) program. In addition, it provides up to 20 of each input signal count simultaneously. The experimental results show twentyfold coincidence counts with the resolution occurring in a less than 0.5 ns coincidence window. This CCU has appropriate characteristics for various quantum optics experiments using multi-photon qubits.

Original languageEnglish
Article number569
Pages (from-to)1-11
Number of pages11
JournalElectronics (Switzerland)
Issue number5
Publication statusPublished - 2021 Mar 1

Bibliographical note

Funding Information:
This research was funded by the Korea Institute of Science and Technology, grant number 2E30620; the National Research Foundation of Korea, grant numbers 2019M3E4A107866011, 2019M3E4A1079777, and 2019R1A2C2006381; and the Institute for Information and Communications Technology Promotion, grant numbers 2020-0-00947 and 2020-0-00972.

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Signal Processing
  • Hardware and Architecture
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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