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Half-Adder and Full-Adder Implementation with Continuous Variable Quantum Gates in a Photonic Quantum Computer

Unknown authors · 2025
hash_id: b2911bec0499e52dcb7271d36eee4e4bd6e98f8aa28ad91a0e6234b536492446 · DOI: 10.1109/qpain66474.2025.11172078

In this article, we report, to the best of our knowledge, for the first time, the design and simulation of half-adder and full-adder circuits implemented using continuous variable (CV) quantum gates within the framework of quantum photonics. Our approach supports the high-dimensional nature of CV and offers an alternative to the commonly used discrete variable (DV) systems for scalable and noise-resilient quantum computing architectures. We utilize Gaussian operations, displacement gates, and beamsplitter-based interferometric circuits to perform quantum arithmetic operations, utilizing CV systems' entanglement and superposition principles. Carefully engineered gate sequences and phase-space manipulations allow us to realize logic operations corresponding to classical addition, with each optical mode representing a computational basis state. We present two distinct circuit designs, one for …

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Photonic Quantum Computing primary