Quantum Discord: A Dynamic Approach in Geometric Picture

2011/07/22 by Mingjun Shi, Shi, Mingjun, Fengjian Jiang +3
Computer Science · Physics and Astronomy · #FOS: Physical sciences #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Physics (quant-ph) #Quantum and electron transport phenomena

paper · pdf · doi:10.48550/arxiv.1107.4457

openalex publication_date 2011/07/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present a dynamic approach to study the quantum discord and classical correlation. By local filtering operation, the evaluation of quantum discord is closely related to quantum channel and channel capacity. As a consequence, the traditional optimization over horizontal-or-vertical von Neumann measurements is replaced by that over horizontal-and-vertical three-element POVM measurement, from which more rigorous results of quantum discord are obtained.

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