First design of a superconducting qubit for the QUB-IT experiment

• URL: http://arxiv.org/abs/2207.09290v3
• Date: Mon, 17 Oct 2022 18:23:00 GMT
• Title: First design of a superconducting qubit for the QUB-IT experiment
• Authors: Danilo Labranca, Herv\`e Ats\`e Corti, Leonardo Banchi, Alessandro Cidronali, Simone Felicetti, Claudio Gatti, Andrea Giachero, Angelo Nucciotti
• Abstract summary: The goal of the QUB-IT project is to realize an itinerant single-photon counter exploiting Quantum Non Demolition (QND) measurements and entangled qubits. We present the design and simulation of the first superconducting device consisting of a transmon qubit coupled to a resonator using Qiskit-Metal.
• Score: 50.591267188664666
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Quantum sensing is a rapidly growing field of research which is already improving sensitivity in fundamental physics experiments. The ability to control quantum devices to measure physical quantities received a major boost from superconducting qubits and the improved capacity in engineering and fabricating this type of devices. The goal of the QUB-IT project is to realize an itinerant single-photon counter exploiting Quantum Non Demolition (QND) measurements and entangled qubits, in order to surpass current devices in terms of efficiency and low dark-count rates. Such a detector has direct applications in Axion dark-matter experiments (such as QUAX[1]), which require the photon to travel along a transmission line before being measured. In this contribution we present the design and simulation of the first superconducting device consisting of a transmon qubit coupled to a resonator using Qiskit-Metal (IBM). Exploiting the Energy Participation Ratio (EPR) simulation we were able to extract the circuit Hamiltonian parameters, such as resonant frequencies, anharmonicity and qubit-resonator couplings.

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