First design of a superconducting qubit for the QUB-IT experiment
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.
Danilo Labranca Hervè Atsè Corti Leonardo Banchi Alessandro Cidronali Simone Felicetti Claudio Gatti Andrea Giachero Angelo Nucciotti