Computable lower bounds on the entanglement cost of quantum channels
Computable lower bounds on the entanglement cost of quantum channels
复制标题
量子通道纠缠成本的可计算下限
DOI:
10.1088/1751-8121/aca731
复制
发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Ludovico Lami and Bartosz Regula
中科院分区:
文献类型:
--
作者:
Zhang Guozhu;Zeng Hao;Liu Jiangyang;Nagashima Kazuki;Takahashi Tsunaki;Hosomi Takuro;Tanaka Wataru;Yanagida Takeshi;Ludovico Lami and Bartosz Regula;Ludovico Lami and Bartosz Regula
A class of lower bounds for the entanglement cost of any quantum state was recently introduced in Lami and Regula (2023 Nature Physics) in the form of entanglement monotones known as the tempered robustness and tempered negativity. Here we extend their definitions to point-to-point quantum channels, establishing a lower bound for the asymptotic entanglement cost of any channel, whether finite or infinite dimensional. This leads, in particular, to a bound that is computable as a semidefinite program and that can outperform previously known lower bounds, including ones based on quantum relative entropy. In the course of our proof we establish a useful link between the robustness of entanglement of quantum states and quantum channels, which requires several technical developments such as showing the lower semicontinuity of the robustness of entanglement of a channel in the weak*-operator topology on bounded linear maps between spaces of trace class operators.
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影响因子:
8.6
作者:
G. Gour;A. Winter
通讯作者:
G. Gour;A. Winter
影响因子:
1.2
作者:
M. Wilde;M. Berta;C. Hirche;Eneet Kaur
通讯作者:
M. Wilde;M. Berta;C. Hirche;Eneet Kaur
DOI:
10.1103/physreva.98.042338
发表时间:
2018-07
期刊:
ArXiv
影响因子:
--
作者:
M. Wilde
通讯作者:
M. Wilde
影响因子:
19.6
作者:
Lami, Ludovico;Regula, Bartosz
通讯作者:
Regula, Bartosz
DOI:
10.1063/1.4943598
发表时间:
2015
期刊:
arXiv: Quantum Physics
影响因子:
--
作者:
M. Shirokov
通讯作者:
M. Shirokov