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arXiv quant-ph/0006129quant-ph
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Dirac表象中的两个量子比特

Two Qubits in the Dirac Representation

A. K. Rajagopal, R. W. Rendell

摘要:

一个一般的两个量子比特系统表示的完整的一套单位和15无痕,厄米狄拉克矩阵,表现出新的功能,这个系统。著名的物理解释与相对论狄拉克方程涉及的对称操作的时间反演T,电荷共轭C,宇称P,和它们的产品在这里重新解释,通过检查它们的行动对基本贝尔态。在这些对称性操作下的贝尔基态的变换性质也揭示了C是唯一不混合贝尔态的算子,而所有其他算子都是这样。以类似的方式,用狄拉克矩阵来表达量子计算机中引入的各种逻辑门表明,例如,非门与时间反演和奇偶运算符的乘积有关。

英文摘要:

A general two qubit system expressed in terms of the complete set of unit and fifteen traceless, Hermitian Dirac matrices, is shown to exhibit novel features of this system. The well-known physical interpretations associated with the relativistic Dirac equation involving the symmetry operations of time-reversal T, charge conjugation C, parity P, and their products are reinterpreted here by examining their action on the basic Bell states. The transformation properties of the Bell basis states under these symmetry operations also reveal that C is the only operator that does not mix the Bell states whereas all others do. In a similar fashion, expressing the various logic gates introduced in the subject of quantum computers in terms of the Dirac matrices shows for example, that the NOT gate is related to the product of time-reversal and parity operators.

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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