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A scalable superconducting quantum simulator with long-range connectivity based on a photonic bandgap metamaterial

Zhang, Xueyue and Kim, Eunjong and Mark, Daniel K. and Choi, Soonwon and Painter, Oskar (2022) A scalable superconducting quantum simulator with long-range connectivity based on a photonic bandgap metamaterial. . (Submitted)

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Synthesis of many-body quantum systems in the laboratory can provide further insight into the emergent behavior of quantum materials. While the majority of engineerable many-body systems, or quantum simulators, consist of particles on a lattice with local interactions, quantum systems featuring long-range interactions are particularly difficult to model and interesting to study due to the rapid spatio-temporal growth of entanglement in such systems. Here we present a scalable quantum simulator architecture based on superconducting transmon qubits on a lattice, with interactions mediated by the exchange of photons via a metamaterial waveguide quantum bus. The metamaterial waveguide enables extensible scaling of the system and multiplexed qubit read-out, while simultaneously protecting the qubits from radiative decay. As an initial demonstration of this platform, we realize a 10-qubit simulator of the one-dimensional Bose-Hubbard model, with in situ tunability of both the hopping range and the on-site interaction. We characterize the Hamiltonian of the system using a measurement-efficient protocol based on quantum many-body chaos, uncovering the remnant phase of Bloch waves of the metamaterial bus in the long-range hopping terms. We further study the many-body quench dynamics of the system, revealing through global bit-string statistics the predicted crossover from integrability to ergodicity as the hopping range is extended beyond nearest-neighbor. Looking forward, the metamaterial quantum bus may be extended to a two-dimensional lattice of qubits, and used to generate other spin-like lattice interactions or tailored lattice connectivity, expanding the accessible Hamiltonians for analog quantum simulation using superconducting quantum circuits.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Zhang, Xueyue0000-0001-8994-0629
Kim, Eunjong0000-0003-4879-8819
Mark, Daniel K.0000-0002-5017-5218
Choi, Soonwon0000-0002-1247-062X
Painter, Oskar0000-0002-1581-9209
Additional Information:The authors thank Alexey Gorshkov, Alejandro Gonzalez-Tudela, Darrick Chang, Olexei Motrunich, Ruichao Ma, Fernando Brandao, Gil Refael, and Zhaoyi Zheng for helpful discussions. We appreciate MIT Lincoln Laboratories for the provision of traveling-wave parametric amplifiers used for both spectroscopic and time-domain measurements in this work, and the AWS Center for Quantum Computing for the Eccosorb filters installed in the cryogenic setup for infrared filtering. We also thank the Quantum Machines team for technical support and discussions on the Quantum Orchestration Platform. This work was supported by the AFOSR Quantum Photonic Matter MURI (grant FA9550-16-1-0323), the DOE-BES Quantum Information Science Program (grant DE-SC0020152), the Institute for Quantum Information and Matter, an NSF Physics Frontiers Center (grant PHY-1125565) with support of the Gordon and Betty Moore Foundation, the Kavli Nanoscience Institute at Caltech, and the AWS Center for Quantum Computing. D. K. M. acknowledges support from the NSF QLCI program (2016245) and the DOE Quantum Systems Accelerator Center (contract no. 7568717).
Group:AWS Center for Quantum Computing, Institute for Quantum Information and Matter, Kavli Nanoscience Institute
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA9550-16-1-0323
Gordon and Betty Moore FoundationUNSPECIFIED
Quantum Systems Accelerator7568717
Record Number:CaltechAUTHORS:20220628-234305742
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:115286
Deposited By: Joy Painter
Deposited On:29 Jun 2022 14:28
Last Modified:29 Jun 2022 14:28

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