Majorana decomposition for two-qubit pure states

Majorana decomposition for two-qubit pure states
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二量子位纯态的马约拉纳分解

DOI:
10.1088/1751-8121/ac07eb
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发表时间:
2021
影响因子:
2.1
通讯作者:
Fu L. B.
Fu L. B.
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Yang C.;Liu H. D.;Fu L. B.

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Majorana表象(MR)描述了Bloch球上的量子态及其随Majorana星的演化,为我们研究SU(2)对称的多量子比特纯态物理系统提供了一种直观的方法.在这项工作中,我们提出了一种方法来扩展一般的两量子比特纯态的MR。通过在具有两个基星的对称两量子比特态上增加一个额外的代表量子比特对称性的参考星星(RS),我们给出了对称、反对称和一般两量子比特态的更一般的MR.利用这种方法,我们研究了纠缠度和Berry相位以及它们之间的关系。此外,我们还讨论了不同类型的两量子比特态的对称性。
The Majorana representation (MR), which represents a quantum state and its evolution with the Majorana stars (MSs) on the Bloch sphere, provides us an intuitive way to study symmetric multiqubit pure states physical system with SU(2) symmetry. In this work, we propose a method to extend the MR for generic two-qubit pure states. By adding an additional reference star (RS), which represents the symmetry of the qubits, on the symmetric two qubit state with two base stars, we give a more general MR for both symmetric, anti-symmetric and generic two-qubit states. Using this method, we study the entanglement, Berry phase and their relation by this Majorana decomposition. Furthermore, the symmetries for different type of two-qubit states are also discussed via the RSs and correlation between the two MSs.
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