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Characterization of a Transmon Qubit in a 3D Cavity for Quantum Machine Learning and Photon Counting

Alessandro D’Elia, Boulos Alfakes, Anas Alkhazaleh +19 more

In this paper, we report the use of a superconducting transmon qubit in a 3D cavity for quantum machine learning and photon counting applications. We first describe the realization and characterization of a transmon qubit coupled to a 3D resonator, providing a detailed description of the simulation framework and of the experimental measurement of important parameters, such as the dispersive shift and the qubit anharmonicity. We then report on a Quantum Machine Learning application implemented on a single-qubit device to fit the u-quark parton distribution function of the proton. In the final section of the manuscript, we present a new microwave photon detection scheme based on two qubits coupled to the same 3D resonator. This could in principle decrease the dark count rate, favoring applications like axion dark matter searches.In this paper, we report the use of a superconducting transmon qubit in a 3D cavity for quantum machine learning and photon counting applications. We first describe the realization and characterization of a transmon qubit coupled to a 3D resonator, providing a detailed description of the simulation framework and of the experimental measurement of important parameters, such as the dispersive shift and the qubit anharmonicity. We then report on a Quantum Machine Learning application implemented on a single-qubit device to fit the u-quark parton distribution function of the proton. In the final section of the manuscript, we present a new microwave photon detection scheme based on two qubits coupled to the same 3D resonator. This could in principle decrease the dark count rate, favoring applications like axion dark matter searches.

arXiv:2402.04322Applied SciencesFeb 11, 20249 citations

Beyond the transmon: A new generation of superconducting qubits

David Schuster

Bulletin of the American Physical SocietyMar 5, 20190 citations

Floquet Quantum Simulation with Superconducting Qubits

Oleksandr Kyriienko, Anders S. Sørensen

Superconducting circuits are an excellent platform for quantum simulation, with various protocols enacted using highly coherent transmon qubits in a digital (gate-based) approach. Analog simulations with transmons, though, are typically limited by restrictive intercircuit coupling. The authors propose an alternative strategy based on periodic modulation of an effective magnetic field, enabling a Floquet description of the system. This allows one to modify the existing two-qubit interaction and the effective spin Hamiltonian, without modifying the setup. Detailed analysis shows this Floquet-type simulator to be quite advantageous, outperforming state-of-the-art digital approaches.Superconducting circuits are an excellent platform for quantum simulation, with various protocols enacted using highly coherent transmon qubits in a digital (gate-based) approach. Analog simulations with transmons, though, are typically limited by restrictive intercircuit coupling. The authors propose an alternative strategy based on periodic modulation of an effective magnetic field, enabling a Floquet description of the system. This allows one to modify the existing two-qubit interaction and the effective spin Hamiltonian, without modifying the setup. Detailed analysis shows this Floquet-type simulator to be quite advantageous, outperforming state-of-the-art digital approaches.

arXiv:1703.04827Physical Review AppliedJun 19, 201848 citations

Quantum Simulation with Arrays of Transmon Qubits

Shay Hacohen-Gourgy, Vinay Ramasesh, Oliver Viehmann +3 more

Bulletin of the American Physical SocietyMar 3, 20140 citations

3D integrated superconducting qubits

Danna Rosenberg, Kim, D, Rabindra Nath Das +12 more

Jan 1, 2017207 citations

From Macroscopic Quantum Tunneling to Circuit QED: Coherence and Dissipation in 3D Transmon Qubits

Gustavo Moreto Pimenta, Diego Molina, Saulo Alberton +9 more

Measurement setup, data acquisition, and visualization procedures for a flux-tunable 3D transmon superconducting qubit.

May 6, 20260 citations

Superconducting 3D Transmon Qubits for Analog Quantum Simulations

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