Quantifying dynamical total coherence in a resource non-increasing framework

被引:1
作者
Yang, Si-ren [1 ]
Yu, Chang-shui [1 ,2 ]
机构
[1] Dalian Univ Technol, Sch Phys, Linggong Rd, Dalian 116024, Liaoning, Peoples R China
[2] Dalian Univ Technol, DUT BSU joint Inst, Linggong Rd, Dalian 116024, Liaoning, Peoples R China
基金
中国国家自然科学基金;
关键词
Quantum resource theory; Quantum channels; Quantum coherence; STRONG CONVERSE; QUANTUM; DISCRIMINATION; CHANNELS;
D O I
10.1007/s11128-022-03726-z
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We quantify the dynamical quantum resource in the resource non-increasing (RNI) framework, namely the free dynamical resource is defined by the channels that cannot increase the static "resourcefulness" of any input state. We present two kinds of approaches to quantifying the dynamical resource, the distance measures and the maximal increasing static resource. As a demonstration, we quantify the dynamical total coherence with our presented measures. It is shown that the distance-based measures have good operational interpretation through quantum processing tasks and can be numerically calculated by semidefinite programming (SDP) and the measures based on the maximal increasing static resource could lead to the analytical solution. As an application, we consider the dynamical total coherence of the qubit amplitude damping channel. Both the analytical measure based on the static l(2) norm and the numerical illustrations based on the SDP are given.
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页数:23
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