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Your search keyword '"Zhou, Lan"' showing total 29 results
Start Over Author "Zhou, Lan" Journal chinese physics b
29 results on '"Zhou, Lan"'

2. One-step quantum dialogue.

Author

Zhu, Peng-Hui, Zhong, Wei, Du, Ming-Ming, Li, Xi-Yun, Zhou, Lan, and Sheng, Yu-Bo

Subjects
OPTICAL elements, PHOTONS
Abstract

Quantum dialogue (QD) enables two communication parties to directly exchange secret messages simultaneously. In conventional QD protocols, photons need to transmit in the quantum channel for two rounds. In this paper, we propose a one-step QD protocol based on the hyperentanglement. With the help of the non-local hyperentanglement-assisted Bell state measurement (BSM), the photons only need to transmit in the quantum channel once. We prove that our one-step QD protocol is secure in theory and numerically simulate its secret message capacity under practical experimental condition. Compared with previous QD protocols, the one-step QD protocol can effectively simplify the experiment operations and reduce the message loss caused by the photon transmission loss. Meanwhile, the non-local hyperentanglement-assisted BSM has a success probability of 100% and is feasible with linear optical elements. Moreover, combined with the hyperentanglement heralded amplification and purification, our protocol is possible to realize long-distance one-step QD. [ABSTRACT FROM AUTHOR]

Published
2024
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22. Electronic cluster state entanglement concentration based on charge detection

Author

Sheng Yu-Bo, Zhao Sheng-Yang, Liu Jiong, and Zhou Lan

Subjects
Quantum nondemolition measurement, Physics, Cluster state, Quantum mechanics, Cluster (physics), General Physics and Astronomy, Charge (physics), Quantum Physics, Electron, Quantum entanglement, Atomic physics, Quantum computer, Spin-½
Abstract

We propose an efficient entanglement concentration protocol (ECP) based on electron-spin cluster states assisted with single electrons. In the ECP, we adopt the electron polarization beam splitter (PBS) and the charge detector to construct the quantum nondemolition measurement. According to the result of the measurement of the charge detection, we can ultimately obtain the maximally entangled cluster states. Moreover, the discarded items can be reused in the next round to reach a high success probability. This ECP may be useful in current solid quantum computation.

Published
2014
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29. Optimal entanglement concentration for three-photonW states with parity check measurement.

Author

Zhou Lan, Sheng Yu-Bo, and Zhao Sheng-Mei

Subjects
*QUANTUM communication, *PARITY-check matrix, *POLARIZED photons, *QUANTUM information science, *PROBABILITY theory
Abstract

We present an efficient entanglement concentration protocol (ECP) for the less-entangledWstate with some identical conventional polarized single photons. In the protocol, two of the parties say Alice and Charlie should perform the parity check measurements and they can ultimately obtain the maximally entangled W state with a certain success probability. Otherwise, they can obtain another less-entangled W state, which can be reconcentrated into the maximally entangled W state. By iterating this ECP, a high success probability can be achieved. This ECP may be an optimal one and it is useful in current quantum information processing. [ABSTRACT FROM AUTHOR]

Published
2013
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