Work

Quantum discord of mixed states under noisy channels in the curved spacetime

Year: 2026

Type: article

Abstract: We focus our attention on two-qubit mixed states as initial states, and apply the geometric measure of quantum discord to investigate quantum discord properties in the background of a Schwarzschild black hole under phase damping, phase flip and bit flip channels, respectively. Several analytical complementary relationships based on quantum discords for bipartite subsystems are proposed. For the three channel noises, the behaviors of discords are similar, the accessible discords always degrade as the Hawking acceleration rising, but sudden death never occurs, while the inaccessible discords increase from zero monotonically. Interestingly, in the case of the bit flip channel and phase flip channel, the discords perform symmetrically with the decay probability rising.

Source: The European Physical Journal C

DOI: 10.1140/epjc/s10052-026-15563-w

Authors: Yuxuan Xiong, Zhiling Pi, Tinggui Zhang, Xiaofen Huang

Institution: Hainan Normal University

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: diamond

Funders: National Natural Science Foundation of China, China Scholarship Council, Natural Science Foundation of Hainan Province

Award: G2622655184