| 摘要: |
| 量子失协作为一种重要的非经典关联度量被广泛应用于量子计算, 量子远程态制备等研究领域. 事实上由于量子失协计算过程的复杂性, 目前并没有得到一般多体量子态量子失协的解析表达. 本文先研究了一类三体态的量子失协, 而后将其推广到N体态. 本文给出的计算公式推广了现有多体态量子失协的研究成果. 进一步, 本文根据量子态中体的个数和泡利矩阵对量子失协计算的影响, 将N体态的量子失协分为五类进行表征. |
| 关键词: 量子失协 多体态 条件测量 |
| DOI： |
| 分类号:O413.1 |
| 基金项目:国家自然科学基金面上项目（12271394）山西省重点研发计划项目（202102 010101004） |
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| QUANTUM DISCORD FOR A FAMILY OF MULTIPARTITE STATES |
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NiHui, 王丽, 贺衎
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Taiyuan University of Technology
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| Abstract: |
| Quantum discord, as a pivotal non classical correlation metric, is extensively employed in sectors such as quantum computing and quantum remote state preparation. Generally speaking, due to the intricacy of the calculation process, determining quantum discord can be a challenging task. At present, there is no universal analytical formula for quantum discord within multipartite systems. This paper initially investigate the quantum discord of a specific class of three-qubit states and provide a comprehensive calculation process. Subsequently, using this three-qubit quantum discord calculation methodology, we derive analytical results for a family of N-qubit states. The analysis methodology outlined herein amplifies the prevailing findings on quantum discord in multipartite systems. Moreover, based on the influence of the number of constituents in the states and the Pauli matrix on quantum discord evaluation, we identify that the quantum discord for this N-qubit family can be classified into five distinct categories. |
| Key words: Quantum discord Multipartite states Conditional measurement |
