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arXiv 0712.0140quant-ph
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相对论对EPR自旋关联的冯诺伊曼熵

The von Neumann Entropy of EPR Spin Correlation for the Relativistic Pairs

Yoshihisa Nishikawa

摘要:

讨论了洛伦兹变换对冯诺伊曼熵的影响。在质心系中取自旋单重态,由洛伦兹变换后取4-动量迹得到的约化密度矩阵计算实验室系中的冯诺伊曼熵.作为讨论EPR自旋关联的模型,我们假定一个母粒子分裂成不同方向的多对态的叠加态。通过计算冯诺伊曼熵和香农熵,我们发现了熵的全局行为,从而看到了相对论效应。我们还讨论了超相对论性极限、两粒子间的可耦合性等问题。

英文摘要:

Variation of the von Neumann entropy by the Lorentz transformation is discussed. Taking the spin-singlet state in the center of mass frame, the von Neumann entropy in the laboratory frame is calculated from the reduced density matrix obtained by taking the trace over 4-momentum after the Lorentz transformation. As the model to discuss the EPR spin correlation, it is supposed that one parent particle splits into a superposition state of various pair states in various directions. Computing the von Neumann entropy and the Shannon entropy, we have shown a global behavior of the entropy to see a relativistic effect. We discuss also the super-relativistic limit, distinguishability between the two particles of the pair and so on.

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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