Excitation dynamics in galvanically coupled fluxonium circuits

Conference · Wed Feb 03 00:00:00 EST 2021

DOI:https://doi.org/10.2172/1779479· OSTI ID:1779479

Ozguler, A. Baris ^[1]; Manucharyan, Vladimir ^[2]; Vavilov, Maxim G. ^[3]

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1. Fermilab
2. Maryland U.
3. Wisconsin U., Madison

We propose a near-term quantum simulator based on the fluxonium qubits galvanically coupled to form a chain. This system provides long coherence time, large anharmonicity, and strong coupling, making it suitable to study strongly interacting Ising spin models. At half-flux quantum sweet spot, the system is described by the transverse field Ising model (TFIM). We evaluate the propagation of qubit excitations through the system. As disorder increases, the excitations become localized. A single qubit measurement using the circuit QED methods is sufficient to identify localization transition without introducing tunable couplers. We argue that galvanically coupled fluxoniums provide opportunities to study localization and many-body effects in highly coherent quantum systems.

• Research Organization: Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1779479
• Report Number(s): FERMILAB-POSTER-21-002; oai:inspirehep.net:1859904
• Country of Publication: United States
• Language: English