D. Massarotti
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View article: Preserving the Josephson Coupling of Twisted Cuprate Junctions via Tailored Silicon Nitride Circuits Boards
Preserving the Josephson Coupling of Twisted Cuprate Junctions via Tailored Silicon Nitride Circuits Boards Open
Controlled fabrication of twisted van der Waals heterostructures is essential to unlock the full potential of moiré materials. However, achieving reproducibility remains a major challenge, particularly for air‐sensitive materials such as B…
View article: Publisher’s Note: “Josephson coupling in lanthanum-based cuprate superlattices” [APL Quantum 2, 016113 (2025)]
Publisher’s Note: “Josephson coupling in lanthanum-based cuprate superlattices” [APL Quantum 2, 016113 (2025)] Open
View article: On-chip microwave coherent source with in-situ control of the photon number distribution
On-chip microwave coherent source with in-situ control of the photon number distribution Open
Coherent photon sources are key elements in different applications, ranging from quantum sensing to quantum computing. The possibility of designing and engineering superconducting circuits behaving like artificial atoms supports the realiz…
View article: Implementation and Readout of Maximally Entangled Two-Qubit Gates Quantum Circuits in a Superconducting Quantum Processor
Implementation and Readout of Maximally Entangled Two-Qubit Gates Quantum Circuits in a Superconducting Quantum Processor Open
Besides noticeable challenges in implementing low-error single- and two-qubit quantum gates in superconducting quantum processors, the readout technique and analysis are a key factor in determining the efficiency and performance of quantum…
View article: Josephson coupling in lanthanum-based cuprate superlattices
Josephson coupling in lanthanum-based cuprate superlattices Open
In most anisotropic compounds such as bismuth-based layered cuprate perovskites, the supercurrent across the blocking layer is of Josephson type, and a single crystal forms a natural stack of Josephson junctions. Here, we report on the evi…
View article: Towards novel tunability schemes for hybrid ferromagnetic transmon qubits
Towards novel tunability schemes for hybrid ferromagnetic transmon qubits Open
Flux tuning of qubit frequencies in superconducting quantum processors is fundamental for implementing single and multi-qubit gates in quantum algorithms. Typical architectures involve the use of DC or fast RF lines. However, these lines i…
View article: Investigating pump harmonics generation in a SNAIL-based traveling wave parametric amplifier
Investigating pump harmonics generation in a SNAIL-based traveling wave parametric amplifier Open
Traveling wave parametric amplifiers (TWPAs) are extensively employed in experiments involving weak microwave signals for their highly desirable quantum-limited and broadband characteristics. However, TWPAs’ broadband nature comes with the…
View article: Modeling_flux_tunabilty_in_JTWPA_with_JosephsonCircuits
Modeling_flux_tunabilty_in_JTWPA_with_JosephsonCircuits Open
Jupyter notebook that supports the findings of the article "Modeling flux tunability in Josephson Traveling Wave Parametric Amplifiers with an open-source frequency-domain simulator". For usage, please, cite (https://arxiv.org/abs/2408.172…
View article: Evidence of the inverse proximity effect in tunnel magnetic josephson junctions
Evidence of the inverse proximity effect in tunnel magnetic josephson junctions Open
Magnetic Josephson junctions (MJJs) are a special class of hybrid systems where antagonistic correlations coexist, thus providing a key for advances in weak superconductivity, superconducting spintronics, and quantum computation. So far, t…
View article: On-chip microwave coherent source with in-situ control of the photon number distribution
On-chip microwave coherent source with in-situ control of the photon number distribution Open
Coherent photon sources are key elements in different applications, ranging from quantum sensing to quantum computing. The possibility of designing and engineering superconducting circuits behaving like artificial atoms supports the realiz…
View article: Phase dynamics of tunnel Al-based ferromagnetic Josephson junctions
Phase dynamics of tunnel Al-based ferromagnetic Josephson junctions Open
By measuring the current–voltage characteristics and the switching current distributions as a function of temperature, we have investigated the phase dynamics of Al tunnel ferromagnetic Josephson junctions (JJs), designed to fall in the ty…
View article: Raw experimental data: Investigating pump harmonics generation in a SNAIL-based Traveling Wave Parametric Amplifier
Raw experimental data: Investigating pump harmonics generation in a SNAIL-based Traveling Wave Parametric Amplifier Open
Raw experimental data that support the findings of the article "Investigating pump harmonics generation in a SNAIL-based Traveling Wave Parametric Amplifier" (https://arxiv.org/abs/2405.20096). A jupyter notebook is provided to reproduce t…
View article: Nanoscale spin ordering and spin screening effects in tunnel ferromagnetic Josephson junctions
Nanoscale spin ordering and spin screening effects in tunnel ferromagnetic Josephson junctions Open
Magnetic Josephson junctions (MJJs) have emerged as a prominent playground to explore the interplay between superconductivity and ferromagnetism. A series of fascinating experiments have revealed striking phenomena at the superconductor/fe…
View article: Numerical Simulations of Josephson Traveling Wave Parametric Amplifiers (JTWPAs): Comparative Study of Open-Source Tools
Numerical Simulations of Josephson Traveling Wave Parametric Amplifiers (JTWPAs): Comparative Study of Open-Source Tools Open
Josephson Traveling Wave Parametric Amplifiers (JTWPAs) are largely exploited\nin quantum technologies for their broadband and low noise performance in the\nmicrowave regime. When one or more microwave tones are applied at the input,\nsuch…
View article: Mitigating Errors on Superconducting Quantum Processors through Fuzzy Clustering
Mitigating Errors on Superconducting Quantum Processors through Fuzzy Clustering Open
Quantum utility has been severely limited in superconducting quantum hardware until now by the modest number of qubits and the relatively high level of control and readout errors, due to the intentional coupling with the external environme…
View article: A feasible path for the use of ferromagnetic josephson junctions in quantum circuits: The ferro-transmon
A feasible path for the use of ferromagnetic josephson junctions in quantum circuits: The ferro-transmon Open
We discuss the capabilities of ferromagnetic (F) Josephson junctions (JJs) in a variety of layouts and configurations. The main goal is to demonstrate the potential of these hybrid JJs to disclose new physics and the possibility to integra…
View article: Discriminating the Phase of a Coherent Tone with a Flux-Switchable Superconducting Circuit
Discriminating the Phase of a Coherent Tone with a Flux-Switchable Superconducting Circuit Open
We propose a new phase detection technique based on a flux-switchable\nsuperconducting circuit, the Josephson digital phase detector (JDPD), which is\ncapable of discriminating between two phase values of a coherent input tone.\nWhen prope…
View article: Investigating the Individual Performances of Coupled Superconducting Transmon Qubits
Investigating the Individual Performances of Coupled Superconducting Transmon Qubits Open
The strong requirement for high-performing quantum computing led to intensive research on novel quantum platforms in the last decades. The circuital nature of Josephson-based quantum superconducting systems powerfully supports massive circ…
View article: Editorial WOLTE-15 Special Issue Introduction
Editorial WOLTE-15 Special Issue Introduction Open
the papers in this special issue were presented at the 15th Workshop on Low Temperature Electronics (WOLTE-15). The conference was held June 6–9, 2022, in Matera, Italy.
View article: High-Quality Ferromagnetic Josephson Junctions Based on Aluminum Electrodes
High-Quality Ferromagnetic Josephson Junctions Based on Aluminum Electrodes Open
Aluminum Josephson junctions are the building blocks for the realization of superconducting quantum bits. Attention has been also paid to hybrid ferromagnetic Josephson junctions, which allow switching between different magnetic states, ma…
View article: Investigation of Superconducting Molybdenum Silicide Nanostrips and Microstrips for Single Photon Detectors
Investigation of Superconducting Molybdenum Silicide Nanostrips and Microstrips for Single Photon Detectors Open
Superconducting nanostrip single photon detectors have emerged as the highest performing single-photon detectors; however, the possibility to use superconducting microstrip as single photon detectors is very appealing both to use them as l…
View article: Hybrid ferromagnetic transmon qubit: Circuit design, feasibility, and detection protocols for magnetic fluctuations
Hybrid ferromagnetic transmon qubit: Circuit design, feasibility, and detection protocols for magnetic fluctuations Open
We propose to exploit currently available tunnel ferromagnetic Josephson junctions to realize a hybrid superconducting qubit. We show that the characteristic hysteretic behavior of the ferromagnetic barrier provides an alternative and intr…
View article: Coexistence and tuning of spin-singlet and triplet transport in spin-filter Josephson junctions
Coexistence and tuning of spin-singlet and triplet transport in spin-filter Josephson junctions Open
View article: Tabel of Contents
Tabel of Contents Open
View article: Inverse magnetic hysteresis of the Josephson supercurrent: Study of the magnetic properties of thin niobium/permalloy <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mo>(</mml:mo><mml:msub><mml:mi>Fe</mml:mi><mml:mn>20</mml:mn></mml:msub><mml:msub><mml:mi>Ni</mml:mi><mml:mn>80</mml:mn></mml:msub></mml:mrow></mml:math>) interfaces
Inverse magnetic hysteresis of the Josephson supercurrent: Study of the magnetic properties of thin niobium/permalloy ) interfaces Open
We propose a picture for the magnetic properties of\nsuperconductor/ferromagnet (S/F) heterostructures based on Nb and permalloy\n(Py: Fe_{20}Ni_{80}). By measuring the magnetic moment as a function of the\ntemperature in S/F/S trilayers f…
View article: Low temperature characterization of high efficiency spin-filter Josephson junctions
Low temperature characterization of high efficiency spin-filter Josephson junctions Open
The interplay between superconducting and ferromagnetic order pa¬rameters in S/F interfaces gives rise to a wide range of peculiar properties with applications in high-efficiency computation and in the emerging field of super¬conducting sp…
View article: Author Correction: Superconductor to resistive state switching by multiple fluctuation events in NbTiN nanostrips
Author Correction: Superconductor to resistive state switching by multiple fluctuation events in NbTiN nanostrips Open
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
View article: Ferromagnetic Josephson Junctions for High Performance Computation
Ferromagnetic Josephson Junctions for High Performance Computation Open
Josephson junctions drive the operation of superconducting qubits and they are the key for the coupling and the interfacing of superconducting qubit components with other quantum platforms. They are the only means to introduce non linearit…
View article: Superconductor to resistive state switching by multiple fluctuation events in NbTiN nanostrips
Superconductor to resistive state switching by multiple fluctuation events in NbTiN nanostrips Open
We report on measurements of the switching current distributions on two-dimensional superconducting NbTiN strips that are 5 nm thick and 80 nm wide. We observe that the width of the switching current distributions has a non-monotonous temp…
View article: Depairing Current at High Magnetic Fields in Vortex-Free High-Temperature Superconducting Nanowires
Depairing Current at High Magnetic Fields in Vortex-Free High-Temperature Superconducting Nanowires Open
Superconductors are essential in many present and future technologies, from large-scale devices for medical imaging, accelerators, or fusion experiments to ultra-low-power superconducting electronics. However, their potential applicability…