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Circuit-Based Quantum Random Access Memory for Classical Data With Continuous Amplitudes
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DOI：10.1109/TC.2020.3037932.png)
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Abstract
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Loading data in a quantum device is required in several quantum computing applications. Without an efficient loading procedure, the cost to initialize the algorithms can dominate the overall computational cost. A circuit-based quantum random access memory named FF-QRAM can load M n-bit patterns with computational cost O(CMn) to load continuous data where C depends on the data distribution. In this article, we propose a strategy to load continuous data without post-selection with computational cost O(Mn). The proposed method is based on the probabilistic quantum memory, a strategy to load binary data in quantum devices, and the FF-QRAM using standard quantum gates, and is suitable for noisy intermediate-scale quantum computers.
Keywords:
Quantum RAM
quantum state initialization
data loading in quantum devices
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