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Paper 1
Randomized benchmarking for qudit Clifford gates
Mahnaz Jafarzadeh, Ya-Dong Wu, Yuval R. Sanders, Barry C. Sanders
- Year
- 2019
- Journal
- arXiv preprint
- DOI
- arXiv:1911.08162
- arXiv
- 1911.08162
We introduce unitary-gate randomized benchmarking (URB) for qudit gates by extending single-and multi-qubit URB to single- and multi-qudit gates. Specifically, we develop a qudit URB procedure that exploits unitary 2-designs. Furthermore, we show that our URB procedure is not simply extracted from the multi-qubit case by equating qudit URB to URB of the symmetric multi-qubit subspace. Our qudit URB is elucidated by using pseudocode, which facilitates incorporating into benchmarking applications.
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Squeezing and multimode entanglement of surface acoustic wave phonons
Gustav Andersson, Shan W. Jolin, Marco Scigliuzzo, Riccardo Borgani, Mats O. Tholén, J. C. Rivera Hernández, Vitaly Shumeiko, David B. Haviland, Per Delsing
- Year
- 2020
- Journal
- arXiv preprint
- DOI
- arXiv:2007.05826
- arXiv
- 2007.05826
Exploiting multiple modes in a quantum acoustic device could enable applications in quantum information in a hardware-efficient setup, including quantum simulation in a synthetic dimension and continuous-variable quantum computing with cluster states.We develop a multimode surface acoustic wave (SAW) resonator with a superconducting quantum interference device (SQUID) integrated in one of the Bragg reflectors. The interaction with the SQUID-shunted mirror gives rise to coupling between the more than 20 accessible resonator modes. We exploit this coupling to demonstrate two-mode squeezing of SAW phonons, as well as four-mode multipartite entanglement. Our results open avenues for continuous-variable quantum computing in a compact hybrid quantum system.
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