Year: 2023
Type: article
Abstract: Quantum computing requires a novel approach to store data as quantum states, opposite to classical bits. One of the most promising candidates is entangled photons. In this manuscript, we show the photon emission in the range of microwave frequencies of three different types of superconducting circuits, a SQUID, a JPA, and a JTWPA, often used as low-noise parametric amplifiers. These devices can be operated as sources of entangled photons. We report the experimental protocol used to produce and measure microwave radiation from these circuits, as well as data simulations. The collected spectra are obtained by performing single-tone measurements with a direct rf pump on the devices; the output spectra at low powers (below −100 dBm) are well interpreted by the dynamical Casimir model, while at high powers (above −100 dBm) the system is well described by the Autler–Townes fluorescence of a three-level atom.
Source: Instruments
Institutions: Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati, Istituto di Fotonica e Nanotecnologie, Istituto Nazionale di Fisica Nucleare, Trento Institute for Fundamental Physics And Applications, Istituto Nazionale di Ricerca Metrologica, Politecnico di Torino, Fondazione Bruno Kessler
Language: English
Subfield: Artificial Intelligence
Field: Computer Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,557
OpenAlex ID: W4388100651