Hardware-Efficient Quantum Random Access Memory with Hybrid Quantum Acoustic Systems
Journal Article
·
· Physical Review Letters
- Yale Univ., New Haven, CT (United States); OSTI
- University of Science and Technology of China, Hefei (China)
- Yale Univ., New Haven, CT (United States)
- Eidgenoessische Technische Hochschule (ETH), Zurich (Switzerland)
Hybrid quantum systems in which acoustic resonators couple to superconducting qubits are promising quantum information platforms. High quality factors and small mode volumes make acoustic modes ideal quantum memories, while the qubit-phonon coupling enables the initialization and manipulation of quantum states. In this paper, we present a scheme for quantum computing with multimode quantum acoustic systems, and based on this scheme, propose a hardware-efficient implementation of a quantum random access memory (QRAM). Quantum information is stored in high-$$\textit{Q}$$ phonon modes, and couplings between modes are engineered by applying off-resonant drives to a transmon qubit. In comparison to existing proposals that involve directly exciting the qubit, this scheme can offer a substantial improvement in gate fidelity for long-lived acoustic modes. We show how these engineered phonon-phonon couplings can be used to access data in superposition according to the state of designated address modes—implementing a QRAM on a single chip.
- Research Organization:
- Yale Univ., New Haven, CT (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); National Science Foundation (NSF); US Army Research Laboratory (USARL); US Army Research Office (ARO); US Air Force Office of Scientific Research (AFOSR); Packard Foundation
- Grant/Contract Number:
- SC0019406
- OSTI ID:
- 1803799
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 25 Vol. 123; ISSN 0031-9007
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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