| Summary: | A quantum random access memory (qRAM) is considered an essential computing unit to enable polynomial speedups in quantum information processing. Proposed implementations include the use of neutral
atoms and superconducting circuits to construct a binary tree but these systems still require demonstrations of the elementary components. Here, we propose a photonic-integrated-circuit (PIC) architecture
integrated with solid-state memories as a viable platform for constructing a qRAM. We also present an
alternative scheme based on quantum teleportation and extend it to the context of quantum networks.
Both implementations realize the two key qRAM operations, (1) quantum state transfer and (2) quantum
routing, with already demonstrated components: electro-optic modulators, a Mach-Zehnder interferometer
(MZI) network, and nanocavities coupled to artificial atoms for spin-based memory writing and retrieval.
Our approaches furthermore benefit from built-in error detection based on photon heralding. Detailed
theoretical analysis of the qRAM efficiency and query fidelity shows that our proposal presents viable
near-term designs for a general qRAM.
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