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Title: Phonon-mediated quantum state transfer and remote qubit entanglement

Journal Article · · Science

Phonons, and in particular surface acoustic wave phonons, have been proposed as a means to coherently couple distant solid-state quantum systems. Individual phonons in a resonant structure can be controlled and detected by superconducting qubits, enabling the coherent generation and measurement of complex stationary phonon states. In this work, we report the deterministic emission and capture of itinerant surface acoustic wave phonons, enabling the quantum entanglement of two superconducting qubits. Using a 2-millimeter-long acoustic quantum communication channel, equivalent to a 500-nanosecond delay line, we demonstrate the emission and recapture of a phonon by one superconducting qubit, quantum state transfer between two superconducting qubits with a 67% efficiency, and, by partial transfer of a phonon, generation of an entangled Bell pair with a fidelity of 84%.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Laboratory Directed Research and Development (LDRD) Program; Air Force Research Laboratory (AFRL) - Air Force Office of Scientific Research (AFOSR); U.S. Army Research Laboratory; National Science Foundation (NSF)
Grant/Contract Number:
FWP 50503; AC02-06CH11357
OSTI ID:
1547478
Alternate ID(s):
OSTI ID: 1526261
Journal Information:
Science, Journal Name: Science Vol. 364 Journal Issue: 6438; ISSN 0036-8075
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 149 works
Citation information provided by
Web of Science

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