Splitting phonons: Building a platform for linear mechanical quantum computing

• 成果类型: Article
• 署名作者: Qiao, H.; Dumur, E.; Andersson, G.; Yan, H.; Chou, M. -H.; Grebel, J.; Conner, C. R.; Joshi, Y. J.; Miller, J. M.; Povey, R. G.; Wu, X.; Cleland, A. N.
• 署名单位: University of Chicago; United States Department of Energy (DOE); Argonne National Laboratory; University of Chicago; Communaute Universite Grenoble Alpes; Universite Grenoble Alpes (UGA); Institut National Polytechnique de Grenoble
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-14101
• DOI: 10.1126/science.adg8715
• 发表日期: 2023-06-08
• 页码: 1030-1033
• 关键词: state; entanglement

摘要

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. This advances a new solid-state system for implementing linear quantum computing, further providing straightforward conversion between itinerant phonons and superconducting qubits.