Publications de Marco Scigliuzzo

Compact Superconducting Vacuum-gap Capacitors with Low Microwave Loss and High Mechanical Coherence for Scalable Quantum Circuits

Tobias Kippenberg, Amir Youssefi, Mahdi Chegnizadeh, Marco Scigliuzzo

Vacuum-gap capacitors have recently attracted significant interest in superconducting circuit platforms due to their compact design and exceptionally low dielectric losses in the microwave regime. Their intrinsic ability to support mechanical vibrational m ...

American Physical Society (APS)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

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

Quantum collective motion of macroscopic mechanical oscillators

Tobias Kippenberg, Amir Youssefi, Mahdi Chegnizadeh, Shingo Kono, Marco Scigliuzzo

Collective phenomena arise from interactions within complex systems, leading to behaviors absent in individual components. Observing quantum collective phenomena with macroscopic mechanical oscillators has been impeded by the stringent requirement that osc ...

American Association for the Advancement of Science2024

Phonon pumping by modulating the ultrastrong vacuum

Vincenzo Savona, Fabrizio Minganti, Marco Scigliuzzo

The vacuum (i.e., the ground state) of a system in ultrastrong light-matter coupling contains particles that cannot be emitted without any dynamical perturbation and is thus called virtual. We propose a protocol for inducing and observing real mechanical e ...

2024

Mechanically induced correlated errors on superconducting qubits with relaxation times exceeding 0.4 ms

Tobias Kippenberg, Amir Youssefi, Xuxin Wang, Mahdi Chegnizadeh, Shingo Kono, Marco Scigliuzzo

Superconducting qubits are among the most advanced candidates for achieving fault-tolerant quantum computing. Despite recent significant advancements in the qubit lifetimes, the origin of the loss mechanism for state-of-the-art qubits is still subject to i ...

Nature Portfolio2024

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

Mitigation of frequency collisions in superconducting quantum processors

Marco Scigliuzzo

The reproducibility of qubit parameters is a challenge for scaling up superconducting quantum processors. Signal cross talk imposes constraints on the frequency separation between neighboring qubits. The frequency uncertainty of transmon qubits arising fro ...

Amer Physical Soc2023

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