Synthesizing five-body interaction in a superconducting quantum circuit

• URL: http://arxiv.org/abs/2109.00964v1
• Date: Wed, 1 Sep 2021 11:29:12 GMT
• Title: Synthesizing five-body interaction in a superconducting quantum circuit
• Authors: Ke Zhang, Hekang Li, Pengfei Zhang, Jiale Yuan, Jinyan Chen, Wenhui Ren, Zhen Wang, Chao Song, Da-Wei Wang, H. Wang, Shiyao Zhu, Girish S. Agarwal, and Marlan O. Scully
• Abstract summary: We synthesize five-body spin-exchange interaction in a superconducting quantum circuit. A Greenberger-Horne-Zeilinger state is generated in a single step with fidelity estimated to be $0.685$. This study paves a way for quantum simulation involving many-body interactions and high excited states of quantum circuits.
• Score: 12.594562121892576
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Synthesizing many-body interaction Hamiltonian is a central task in quantum simulation. However, it is challenging to synthesize interactions including more than two spins. Borrowing tools from quantum optics, we synthesize five-body spin-exchange interaction in a superconducting quantum circuit by simultaneously exciting four independent qubits with time-energy correlated photon quadruples generated from a qudit. During the dynamic evolution of the five-body interaction, a Greenberger-Horne-Zeilinger state is generated in a single step with fidelity estimated to be $0.685$. We compare the influence of noise on the three-, four- and five-body interaction as a step toward answering the question on the quantum origin of chiral molecules. We also demonstrate a many-body Mach-Zehnder interferometer which potentially has a Heisenberg-limit sensitivity. This study paves a way for quantum simulation involving many-body interactions and high excited states of quantum circuits.

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