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arXiv 0809.3346quant-ph
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类属稳定剂态的同调性

Homology of Generic Stabilizer States

Klaus Wirthmüller

摘要:

本文研究了量子信息理论意义下的多方稳定态。我们调查的同调不变量的状态,其中每一方拥有一个大的相等数量N的量子比特。我们表明,在许多情况下,有一个通用的期望值的不变量:对于大N,它是近似任意高的概率,如果一个稳定状态是随机选择的。结果表明,典型的纠缠的稳定态涉及,但集包括刚刚超过一半的缔约方。我们的主要工具是有限Chevalley群理论的Bruhat分解。

英文摘要:

This work is concerned with multi-party stabilizer states in the sense of quantum information theory. We investigate the homological invariants for states of which each party holds a large equal number N of quantum bits. We show that in many cases there is a generic expected value of the invariants: for large N it is approximated with arbitrarily high probability if a stabilizer state is chosen at random. The result suggests that typical entanglement of stabilizer states involves but the sets comprising just over one half of the parties. Our main tool is the Bruhat decomposition from the theory of finite Chevalley groups.

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