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arXiv 1008.2675quant-phmath-phmath.MP
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互无偏基:自旋态层析成像和星积方案

Mutually unbiased bases: tomography of spin states and star-product scheme

S. N. Filippov, V. I. Man'ko

摘要:

相互无偏基地(MUBs)被认为是一个通用的星产品计划的框架内。我们重新推导出一个完整的一组MUB是足够的自旋断层扫描,即知识的所有概率找到一个系统在每个MUB状态是足够的状态重建。将断层概率表示和星积方案的思想推广到MUB-断层,引入自旋态MUB-符号和算子的反量化器和量化器算子,得到了普通和对偶星积核,由于MUB-投影者要遵守星积方案的特定规则,我们揭示了MUB-投影的李代数结构,并导出了MUB-投影的三乘积和四乘积的新关系。量子比特的例子被认为是详细的。本文讨论了用Stern-Gerlach装置进行的MUB层析成像。

英文摘要:

Mutually unbiased bases (MUBs) are considered within the framework of a generic star-product scheme. We rederive that a full set of MUBs is adequate for a spin tomography, i.e. knowledge of all probabilities to find a system in each MUB-state is enough for a state reconstruction. Extending the ideas of the tomographic-probability representation and the star-product scheme to MUB-tomography, dequantizer and quantizer operators for MUB-symbols of spin states and operators are introduced, ordinary and dual star-product kernels are found. Since MUB-projectors are to obey specific rules of the star-product scheme, we reveal the Lie algebraic structure of MUB-projectors and derive new relations on triple- and four-products of MUB-projectors. Example of qubits is considered in detail. MUB-tomography by means of Stern-Gerlach apparatus is discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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