Publications by Pasquale Scarlino

Observation of first- and second-order dissipative phase transitions in a two-photon driven Kerr resonator

Vincenzo Savona, Simone Frasca, Guillaume Beaulieu, Pasquale Scarlino, Fabrizio Minganti

In open quantum systems, dissipative phase transitions (DPTs) emerge from the interplay between unitary evolution, drive, and dissipation. While second-order DPTs have been predominantly investigated theoretically, first-order DPTs have been observed in si ...

2025

Criticality-Enhanced Quantum Sensing with a Parametric Superconducting Resonator

Simone Frasca, Guillaume Beaulieu, Pasquale Scarlino, Fabrizio Minganti, Marco Scigliuzzo

Quantum metrology, a cornerstone of quantum technologies, exploits entanglement and superposition to achieve higher precision than classical protocols in parameter-estimation tasks. When combined with critical phenomena such as phase transitions, the diver ...

American Physical Society (APS)2025

A dephasing sweet spot with enhanced dipolar coupling

Pasquale Scarlino

Two-level systems (TLSs) are the basic units of quantum computers but face a trade-off between operation speed and coherence due to shared coupling paths. Here, we investigate a TLS given by a singlet-triplet (ST+) transition. We identify a magnetic-field ...

2025

Entangled Photon-Pair Emission in Waveguide Circuit QED from a Cooper Pair Splitter

Pasquale Scarlino

As a waveguide circuit QED architecture, we investigate theoretically the single-photon pair emission of a Cooper pair splitter composed of two double quantum dots, each coupled to a microwave transmission line. We find that this system can generate freque ...

American Physical Society (APS)2025

Landau–Zener without a qubit: multiphoton sidebands interaction and signatures of dissipative quantum chaos

Vincenzo Savona, Pasquale Scarlino, Vincent Jean Yves Jouanny, Fabrizio Minganti, Marco Scigliuzzo

Landau–Zener–Stückelberg–Majorana (LZSM) interference occurs when qubit parameters are periodically modulated across avoided level crossings. We explore this phenomenon in nonlinear multilevel bosonic systems, where interference is influenced by multiple e ...

2025

High kinetic inductance cavity arrays for compact band engineering and topology-based disorder meters

Simone Frasca, Guillaume Beaulieu, Pasquale Scarlino, Vincent Jean Yves Jouanny, Fabian Oppliger, Marco Scigliuzzo

Superconducting microwave metamaterials offer enormous potential for quantum optics and information science, enabling the development of advanced quantum technologies for sensing and amplification. In the context of circuit quantum electrodynamics, such me ...

2025

Dissipative quantum chaos unveiled by stochastic quantum trajectories

Vincenzo Savona, Luca Gravina, Pasquale Scarlino, Fabrizio Minganti, Debbie Eeltink

We define quantum chaos and integrability in open quantum many-body systems as a dynamical property of single stochastic realizations, referred to as quantum trajectories. This definition relies on the predictions of random matrix theory applied to the sub ...

AMER PHYSICAL SOC2025

Integration of Cobalt Ferromagnetic Control Gates for Electrical and Magnetic Manipulation of Semiconductor Quantum Dots (Adv. Funct. Mater. 14/2025)

Mihai Adrian Ionescu, Victor Carle Adrien Boureau, Pasquale Scarlino, Michele Ghini

Wiley2025

Integration of Cobalt Ferromagnetic Control Gates for Electrical and Magnetic Manipulation of Semiconductor Quantum Dots

Mihai Adrian Ionescu, Victor Carle Adrien Boureau, Pasquale Scarlino, Michele Ghini

The rise of electron spin qubit architectures for quantum computing processors has led to a strong interest in designing and integrating ferromagnets to induce stray magnetic fields for electron dipole spin resonance (EDSR). The integration of nanomagnets ...

Wiley2025

Demonstration of Microwave Resonators and Double Quantum Dots on Optimized Reverse-Graded Ge/SiGe Heterostructures

Pasquale Scarlino, Fabian Oppliger

One of the most promising platforms for the realization of spin-based quantum computing are planar germanium quantum wells embedded between silicon-germanium barriers. To achieve comparably thin stacks with little surface roughness, this type of heterostru ...

2024

Strong hole-photon coupling in planar Ge for probing charge degree and strongly correlated states

Pasquale Scarlino, Fabian Oppliger

Semiconductor quantum dots (QDs) in planar germanium (Ge) heterostructures have emerged as front-runners for future hole-based quantum processors. Here, we present strong coupling between a hole charge qubit, defined in a double quantum dot (DQD) in planar ...

Nature Research2024

Three-wave-mixing quantum-limited kinetic inductance parametric amplifier operating at 6 T near 1 K

Camille René Charles Roy, Simone Frasca, Guillaume Beaulieu, Pasquale Scarlino

Parametric amplifiers play a crucial role in modern quantum technology by enabling the enhancement of weak signals with minimal added noise. Traditionally, Josephson junctions have been the primary choice for constructing parametric amplifiers. Nevertheles ...

American Physical Society (APS)2024

Strong coupling between a microwave photon and a singlet-triplet qubit

Jann Hinnerk Ungerer, Pasquale Scarlino

Combining superconducting resonators and quantum dots has triggered tremendous progress in quantum information, however, attempts at coupling a resonator to even charge parity spin qubits have resulted only in weak spin-photon coupling. Here, we integrate ...

Nature Portfolio2024

Decoherence in a crystal-phase defined double quantum dot charge qubit strongly coupled to a high-impedance resonator

Pasquale Scarlino

Decoherence of a charge qubit is usually credited to charge noise in the environment. Here we show that charge noise may not be the limiting factor for the qubit coherence. To this end, we study coherence properties of a crystal-phase defined semiconductor ...

2024

NbN films with high kinetic inductance for high-quality compact superconducting resonators

Edoardo Charbon, Simone Frasca, Pasquale Scarlino, Vincent Jean Yves Jouanny, Fabian Oppliger, Fabrizio Minganti, Marco Scigliuzzo, Roberto Musio

Niobium nitride (NbN) is a particularly promising material for quantum technology applications, as it shows the degree of reproducibility necessary for large-scale superconducting circuits. We demonstrate that resonators based on NbN thin films present a o ...

American Physical Society (APS)2023

Quantum Dots Array on Ultra-Thin SOI Nanowires with Ferromagnetic Cobalt Barrier Gates for Enhanced Spin Qubit Control

Heike Riel, Pasquale Scarlino, Fabian Oppliger, Michele Ghini

In this work we propose and demonstrate the integration of ferromagnetic nanosized cobalt barrier gates in quantum dots arrays on ultra-thin fully-depleted Silicon-On-Insulator (SOI) nanowires. This innovative structure enhances both driving and addressabi ...

IEEE2023

Controlling Atom-Photon Bound States in an Array of Josephson-Junction Resonators

Pasquale Scarlino, Marco Scigliuzzo

Engineering the electromagnetic environment of a quantum emitter gives rise to a plethora of exotic light -matter interactions. In particular, photonic lattices can seed long-lived atom-photon bound states inside photonic band gaps. Here, we report on the ...

American Physical Society2022

In situ Tuning of the Electric-Dipole Strength of a Double-Dot Charge Qubit: Charge-Noise Protection and Ultrastrong Coupling

Pasquale Scarlino

Semiconductor quantum dots in which electrons or holes are isolated via electrostatic potentials generated by surface gates are promising building blocks for semiconductor-based quantum technology. Here, we investigate double-quantum-dot (DQD) charge qubit ...

American Physical Society2022

Fully Tunable Longitudinal Spin-Photon Interactions in Si and Ge Quantum Dots

Pasquale Scarlino

Spin qubits in silicon and germanium quantum dots are promising platforms for quantum computing, but entangling spin qubits over micrometer distances remains a critical challenge. Current prototypical architectures maximize transversal interactions between ...

AMER PHYSICAL SOC2022

Multi-Gate FD-SOI Single Electron Transistor for hybrid SET-MOSFET quantum computing

Mihai Adrian Ionescu, Pasquale Scarlino, Fabian Oppliger

In this work we explore the fabrication and experimental characterization of multi-gate FD-SOI devices that can operate both as single electron transistors (SETs) and MOSFETs. FD-SOI SET operation is achieved with electrostatically induced tunneling barrie ...

IEEE2022