Work

Bell–Clauser–Horne–Shimony–Holt Behavior Under Quantum Loss and Decoherence

Year: 2025

Type: article

Abstract: We present a detailed analysis of the effect of quantum loss and decoherence in the Bell-CHSH scenario. Adopting a device-independent approach, we study the change in the bipartite conditional probability distribution, i.e., the behavior of the realized nonlocal box pair when the elements of the entangled qubit pair subjected to independent noisy quantum channels modeled by completely positive maps. As the verification of Bell inequalities is crucial in device-independent quantum cryptography, our considerations are instructive from the perspective of quantum realizations of nonlocal box pairs. We find that the impact of quantum channels cannot be described by an equivalent classical noise channel.

Source: Cryptography

DOI: 10.3390/cryptography9020025

Authors: Ottó Hanyecz, András Bodor, Peter Adam, Mátyás Koniorczyk

Institutions: Eötvös Loránd University, HUN-REN Wigner Research Centre for Physics, University of Pecs

Language: English

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,930

Funder: European Commission