Quantum blockchain is expected to offer an alternative to classical blockchain to resist malicious attacks laughed by future quantum computers. Although a few quantum blockchain schemes have been constructed, their efficiency is low and unable to meet application requirements due to the fact that they lack of a suitable consensus mechanism. To tackle this issue, a consensus mechanism called quantum delegated proof of stake (QDPoS) is constructed by using quantum voting to provide fast decentralization for the quantum blockchain scheme at first. Then an efficient scheme is proposed for quantum blockchain based on QDPoS, where the classical information is initialized as a part of each single quantum state and these quantum states are entangled to form the chain. Compared with previous methods, the designed quantum blockchain scheme is more complete and carried out with higher efficiency, which greatly contributes to better adapting to the challenges of the quantum era.

中文翻译：

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具有共识机制的高效量子区块链 QDPoS

量子区块链有望提供经典区块链的替代方案，以抵御未来量子计算机嘲笑的恶意攻击。虽然已经构建了一些量子区块链方案，但由于缺乏合适的共识机制，效率低，无法满足应用需求。为了解决这个问题，首先通过使用量子投票构建了一种称为量子委托证明（QDPoS）的共识机制，为量子区块链方案提供快速去中心化。然后提出了一种基于QDPoS的高效量子区块链方案，其中经典信息被初始化为每个单个量子态的一部分，这些量子态纠缠在一起形成链。与以往的方法相比，