Quantum design for advanced qubits: plasmonium
- URL: http://arxiv.org/abs/2109.00994v3
- Date: Fri, 5 Aug 2022 16:05:52 GMT
- Title: Quantum design for advanced qubits: plasmonium
- Authors: Feng-Ming Liu, Ming-Cheng Chen, Can Wang, Shao-Wei Li, Zhong-Xia
Shang, Chong Ying, Jian-Wen Wang, Cheng-Zhi Peng, Xiaobo Zhu, Chao-Yang Lu,
Jian-Wei Pan
- Abstract summary: We demonstrate variational quantum eigensolvers to simulate superconducting quantum circuits with varying parameters covering a plasmon-transition regime.
We fabricate an advanced post-transmon qubit, "plasmonium", which exhibits high single- and two-qubit gate fidelities.
Our work opens the way to designing advanced quantum processors using existing quantum computing resources.
- Score: 4.51227657808872
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: The increasingly complex quantum electronic circuits with a number of coupled
quantum degrees of freedom will become intractable to be simulated on classical
computers, and requires quantum computers for an efficient simulation. In turn,
it will be a central concept in quantum-aided design for next-generation
quantum processors. Here, we demonstrate variational quantum eigensolvers to
simulate superconducting quantum circuits with varying parameters covering a
plasmon-transition regime, which reveals an advanced post-transmon qubit,
"plasmonium". We fabricate this new qubit and demonstrate that it exhibits not
only high single- and two-qubit gate fidelities (99.85(1)% and 99.58(3)%,
respectively), but also a shrinking (by 60%) physical size and larger (by 50%)
anharmonicity than the transmon, which can bring a number of advantages for
scaling up multi-qubit devices. Our work opens the way to designing advanced
quantum processors using existing quantum computing resources.
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