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Laser Physics

Enhancing the capacity of quantum dense coding in the quantum spin channel via non-Hermitian operation

Yang Leng, Fei Chen

Published Mar 10, 2025• 0 citations
Publisher

Abstract

Abstract Using the non-Hermitian operation approach, the enhanceable capacity of quantum dense coding can be realized in the quantum spin chain channel. We derive the exact analytical expressions of the quantum dense coding and in detail investigate the influence of non-Hermitian operator parameters on the quantum dense coding. We find that the non-Hermitian operator process can obviously enhance the quantum dense coding. In particular, we show that the optimal capacity of quantum dense coding can always be larger than 1 with the assistance of non-Hermitian operations.

DOI
10.1088/1555-6611/adbad7

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