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中国物理B：英文版

Complete hyperentangled state analysis and generation of multi-particle entanglement based on charge detection

计彦强, 金钊, 朱爱东, 王洪福, 张寿

Published Jan 1, 2014• 0 citations
OpenAlex

Abstract

We propose the schemes for implementing hyperentangled state analysis and generating four-electron high entangled states(including cluster state, |χ? state, and symmetric Dicke state) based on the charge detection of free electrons.These schemes are deterministic and rely only on charge detection and single-spin rotations. This method, which uses noninteracting electrons, is not only efficient but also saves on quantum resources.

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We propose the schemes for implementing hyperentangled state analysis and generating four-electron high entangled states(including cluster state, |χ? state, and symmetric Dicke state) based on the charge detection of free electrons.These schemes are deterministic and rely only on charge detection and single-spin rotations. This method, which uses noninteracting electrons, is not only efficient but also saves on quantum resources.
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The cluster state is a special, highly entangled quantum state that provides a universal resource on which to perform measurement-based quantum computation. In this paper, we propose a scheme for the generation of such entanglement in a solid-state medium by the suppression of resonant tunneling of a ballistic electron by a nearby single-electron charge qubit. To investigate the viability of this scheme for the creation of cluster states, we performed numerical simulations and studied the entanglement interaction in detail. We show that high levels of entanglement can be achieved, with an average concurrence of 0.968.
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.