Scalable and High-Fidelity Quantum Random Access Memory in Spin-Photon Networks
Name
PRXQuantum.2.030319.pdf
Description
Published version
Size
2.24 MB
Format
Adobe PDF
Checksum (MD5)
7210405e28de830528c030d2e7a474ee
Author(s)
Chen, KC
Dai, W
Errando-Herranz, C
Lloyd, S
Englund, D
Date Issued
2021
Journal
PRX Quantum
Publisher
American Physical Society (APS)
Citation
Chen, KC, Dai, W, Errando-Herranz, C, Lloyd, S and Englund, D. 2021. "Scalable and High-Fidelity Quantum Random Access Memory in Spin-Photon Networks." PRX Quantum, 2 (3).
Version
Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Research Laboratory of Electronics
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Massachusetts Institute of Technology. Department of Mechanical Engineering
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Creative Commons Attribution 4.0 International license
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PRXQUANTUM.2.030319
