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Title: Splitting phonons: Building a platform for linear mechanical quantum computing

Journal Article · · Science
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [3]
  1. Univ. of Chicago, IL (United States)
  2. Univ. of Chicago, IL (United States); Argonne National Laboratory (ANL), Argonne, IL (United States); Univ. of Grenoble (France); Alternative Energies and Atomic Energy Commission (CEA), Cadarache (France)
  3. Univ. of Chicago, IL (United States); Argonne National Laboratory (ANL), Argonne, IL (United States)

Linear optical quantum computing provides a desirable approach to quantum computing, with only a short list of required computational elements. The similarity between photons and phonons points to the interesting potential for linear mechanical quantum computing using phonons in place of photons. Although single-phonon sources and detectors have been demonstrated, a phononic beam splitter element remains an outstanding requirement. Here we demonstrate such an element, using two superconducting qubits to fully characterize a beam splitter with single phonons. We further use the beam splitter to demonstrate two-phonon interference, a requirement for two-qubit gates in linear computing. In conclusion, this advances a new solid-state system for implementing linear quantum computing, further providing straightforward conversion between itinerant phonons and superconducting qubits.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); National Quantum Information Science (QIS) Research Centers (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program; National Science Foundation (NSF); USDOE Office of Science (SC); US Air Force Office of Scientific Research (AFOSR); US Army Research Laboratory (USARL)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
2427971
Journal Information:
Science, Journal Name: Science Journal Issue: 6649 Vol. 380; ISSN 0036-8075
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

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