In this article, the error analysis in the quantum counting algorithm is investigated. It has been found that the random error plays as important a role as the systematic error does in the phase inversion operations. ...In this article, the error analysis in the quantum counting algorithm is investigated. It has been found that the random error plays as important a role as the systematic error does in the phase inversion operations. Both systematic and random errors are important in the Hadamard transformation. This is quite different from the Grover algorithm and the Shor algorithm.展开更多
The neutrino detector of the Jiangmen Underground Neutrino Observatory（JUNO） is designed to use20 kilotons of liquid scintillator and approximately 16000 20 inch photomultipliers（PMTs）.One of the options is to use...The neutrino detector of the Jiangmen Underground Neutrino Observatory（JUNO） is designed to use20 kilotons of liquid scintillator and approximately 16000 20 inch photomultipliers（PMTs）.One of the options is to use the 20 inch R12860 PMT with high quantum efficiency which has recently been developed by Hamamatsu Photonics.The performance of the newly developed PMT preproduction samples is evaluated.The results show that its quantum efficiency is 30%at 400 nm.Its Peak/Valley（P/V） ratio for the single photoelectron is 4.75 and the dark count rate is 27 kHz at the threshold of 3 mV while the gain is at 1 × 10^7.The transit time spread of a single photoelectron is 2.86 ns.Generally the performances of this new 20 inch PMT are improved over the old one of R3600.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos. 10325521, 60433050, and the National Basic 973 Research Program under Grant No. 001CB309308. Acknowledgement The authors would like to thank Mr. Nan Zhao for helpful discussions.
文摘In this article, the error analysis in the quantum counting algorithm is investigated. It has been found that the random error plays as important a role as the systematic error does in the phase inversion operations. Both systematic and random errors are important in the Hadamard transformation. This is quite different from the Grover algorithm and the Shor algorithm.
基金Supported by Strategic Priority Research Program of Chinese Academy of Sciences(X-DA10010200)Key Deployment Project of Chinese Academy of Sciences and CAS Center for Excellence in Particle Physics(CCEPP)
文摘The neutrino detector of the Jiangmen Underground Neutrino Observatory（JUNO） is designed to use20 kilotons of liquid scintillator and approximately 16000 20 inch photomultipliers（PMTs）.One of the options is to use the 20 inch R12860 PMT with high quantum efficiency which has recently been developed by Hamamatsu Photonics.The performance of the newly developed PMT preproduction samples is evaluated.The results show that its quantum efficiency is 30%at 400 nm.Its Peak/Valley（P/V） ratio for the single photoelectron is 4.75 and the dark count rate is 27 kHz at the threshold of 3 mV while the gain is at 1 × 10^7.The transit time spread of a single photoelectron is 2.86 ns.Generally the performances of this new 20 inch PMT are improved over the old one of R3600.
