On Quasi-Inversion of Quantum Channels in 2 and in Higher Dimensions

IF 1.3 4区物理与天体物理 Q3 PHYSICS, MATHEMATICAL

Open Systems & Information Dynamics Pub Date : 2022-09-01 DOI:10.1142/s1230161222500147

V. Karimipour

引用次数: 0

Abstract

We review the concept of the quasi-inverse of qubit channels and of higher dimensional channels. Quasi-inverse is a channel which when concatenaded to the original channel, increases its average fidelity in an optimal way. For qubit channels, we fully characterize the quasi-inverse, while for higher dimensional channels, we prove general theorems and provide bounds for the increased average fidelity. Nevertheless, explicit examples are given when exact quasi-inverses can be found.

查看原文本刊更多论文

二维和高维量子通道的拟反转

我们回顾了量子比特通道和高维通道的准逆的概念。准逆信道是一种当与原始信道连接时，以最优方式增加其平均保真度的信道。对于量子比特信道，我们充分表征了准逆，而对于高维信道，我们证明了一般定理并提供了增加平均保真度的界限。然而，当可以找到精确的拟逆时，给出了明确的例子。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Open Systems & Information Dynamics 工程技术-计算机：信息系统

CiteScore

1.40

自引率

12.50%

发文量

审稿时长

>12 weeks

期刊介绍： The aim of the Journal is to promote interdisciplinary research in mathematics, physics, engineering and life sciences centered around the issues of broadly understood information processing, storage and transmission, in both quantum and classical settings. Our special interest lies in the information-theoretic approach to phenomena dealing with dynamics and thermodynamics, control, communication, filtering, memory and cooperative behaviour, etc., in open complex systems.