Improved quantum de Finetti theorem and its application in quantum key distribution
Improved quantum de Finetti theorem and its application in quantum key distribution
复制标题
改进的量子de Finetti定理及其在量子密钥分配中的应用
DOI:
10.1103/physreva.101.042310
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发表时间:
2020-04
影响因子:
2.9
通讯作者:
Hong-Yi Su
中科院分区:
文献类型:
--
作者:
Hong-Yi Su
Quantum de Finetti theorem indicates that a surprising connection exists between the permutation-invariant property of a large system and the independent, identical distribution that describes its subsystems. The theorem is highly nontrivial in that it allows one to infer independence---within a finite error---from symmetry alone, both of which are important and fundamental concepts in physics and mathematics. Here, we present an improved quantum de Finetti theorem that provides a lower error bound, thus establishing an even closer relationship between symmetry and independence than before. As application, we study the security of quantum key distribution under the most general attacks, and show that the key rate is higher than previous ones obtained by existing trace-norm-based de Finetti theorems. Therefore, the application of the quantum de Finetti theorem in quantum information processing, as well as developing the theorem itself, is advanced here.
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DOI:
10.1016/j.aim.2013.12.010
发表时间:
2013-03
期刊:
arXiv: Mathematical Physics
影响因子:
--
作者:
Mathieu Lewin;P. T. Nam;N. Rougerie
通讯作者:
Mathieu Lewin;P. T. Nam;N. Rougerie
影响因子:
--
作者:
G. Raggio;R. Werner
通讯作者:
G. Raggio;R. Werner
影响因子:
19.6
作者:
R. Renner
通讯作者:
R. Renner
影响因子:
2.3
作者:
DIACONIS, P;FREEDMAN, D
通讯作者:
FREEDMAN, D
影响因子:
8.6
作者:
C. D'Cruz;T. Osborne;R. Schack
通讯作者:
C. D'Cruz;T. Osborne;R. Schack