Park, Byung Kwon Kim, Yong-Su Cho, Young-Wook Moon, Sung Han, Sang-Wook 2024-01-19T15:05:41Z 2024-01-19T15:05:41Z 2021-09-04 2021-03 2079-9292 https://pubs.kist.re.kr/handle/201004/117345 This paper presents a 20-channel coincidence counting unit (CCU) using a low-end field-programmable 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. English MDPI Arbitrary Configurable 20-Channel Coincidence Counting Unit for Multi-Qubit Quantum Experiment Article 10.3390/electronics10050569 1 ELECTRONICS, v.10, no.5, pp.1 - 11 ELECTRONICS 10 5 1 11 scie scopus 000628008100001 2-s2.0-85101679884 Computer Science, Information Systems Engineering, Electrical & Electronic Physics, Applied Computer Science Engineering Physics Article coincidence counting unit coincidence measurement FPGA