| 摘要: |
| 摘 要:通过量子计算和量子信息理论中两个物理量concurrence 和fidelity引入正算子方块积的概念,
类比序列积代数性质的相关结果,给出了方块积的一些代数性质和反例,并对不同Hilbert空间之间保持
concurrence或fidelity的变换进行了刻画. |
| 关键词: 关键词:序列积 方块积 密度矩阵 保持 |
| DOI： |
| 分类号: |
| 基金项目: |
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| Some algebraic properties of the ◇2products of positive operators |
|
WANGWe i2we i1 , BI Hong2me i2
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| Abstract: |
| Abstract: We introduce the ◇2p roducts by considering two physical quantities ( namely, the concurrence and
fidelity) , which p lay an important role in quantum computation and quantum information. Then by comparing ◇2
p roduct with the sequential p roduct, we give some algebraic p roperties of ◇2p roducts and some counter examp les.
Finally, we obtain a characterization of trans 2formations that p reserve concurrence or fidelity between different Hil2
bert spaces. |
| Key words: Key words: sequential p roduct ◇2p roduct densitymatrix p reservers |
