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arXiv quant-ph/0410035quant-ph
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局部Clifford群的不变量

The invariants of the local Clifford group

Maarten Van den Nest, Jeroen Dehaene, Bart De Moor

摘要:

研究了在共轭局部Clifford群作用下保持不变的复多项式代数。在这个代数中,我们考虑齐次多项式的线性空间,并为每个度构造这些向量空间的基,从而获得多项式不变量的生成集。我们的方法是基于描述的Clifford算子的线性运算在GF(2)。这种局部Clifford群的多项式不变量的研究在量子编码理论,特别是二进制量子码的分类中具有重要意义。最后简要讨论了它在纠缠理论和量子计算中的应用。

英文摘要:

We study the algebra of complex polynomials which remain invariant under the action of the local Clifford group under conjugation. Within this algebra, we consider the linear spaces of homogeneous polynomials degree by degree and construct bases for these vector spaces for each degree, thereby obtaining a generating set of polynomial invariants. Our approach is based on the description of Clifford operators in terms of linear operations over GF(2). Such a study of polynomial invariants of the local Clifford group is mainly of importance in quantum coding theory, in particular in the classification of binary quantum codes. Some applications in entanglement theory and quantum computing are briefly discussed as well.

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