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Quantum secured-imaging using decoy state heralded single photon source

Siddhant Vernekar, Jolly Xavier

Published Jan 1, 2024• 1 citation
Publisher

Abstract

Considering a low mean photon number regime, we make a comparative analysis investigating the superior performance of decoy state heralded single photon source, making it ideal choice for integrating QKD protocols for secure quantum imaging.
DOI
10.1364/quantum.2024.qtu3a.52

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Spontaneous parametric down-conversion heralded single photon pairs (HSPS) are utilized in quantum key distribution (QKD) and quantum imaging (QI) experiments. Decoy state methods enhance security in these fields. HSPS is well-suited for integrating QKD protocols, reducing measurement uncertainty, and ensuring secure quantum imaging. This study examines the performance of the HSPS-decoy state method for quantum imaging under various conditions, focusing on secure key rate and Quantum Bit Error Rate (QBER) for free space applications. We specifically investigate the HSPS within the BB84 decoy state protocol for secure quantum imaging in free space. The dark count rate significantly impacts QBER, affecting the maximum tolerable loss. Low-efficiency, low-noise detectors can outperform high-efficiency, high-noise detectors, highlighting the importance of minimizing dark counts for optimal system performance.