628 citations · 3.9k across the 40 of their papers we have counts for
42 papers
Experimental realization of a transmon qubit
Erwan Roverc'h, Alvise Borgognoni, Marius Villiers +7
Superconducting circuits with embedded symmetries are good candidates to robustly protect quantum information from dominant error channels. The qubit, consisting of an i…
Probing the quantum motion of a macroscopic mechanical oscillator with a radio-frequency superconducting qubit
Kyrylo Gerashchenko, Rémi Rousseau, Léo Balembois +11
Long-lived mechanical resonators like drums oscillating at MHz frequencies and operating in the quantum regime are a powerful platform for quantum technologies and tests of fundame…
Enhancing dissipative cat qubit protection by squeezing
Rémi Rousseau, Diego Ruiz, Emanuele Albertinale +38
Dissipative cat-qubits are a promising architecture for quantum processors due to their built-in quantum error correction. By leveraging two-photon stabilization, they achieve an e…
High quality superconducting tantalum resonators with beta phase defects
Ritika Dhundhwal, Haoran Duan, Lucas Brauch +16
For practical superconducting quantum processors, orders of magnitude improvement in coherence is required, motivating efforts to optimize hardware design and explore new materials…
Dissipating quartets of excitations in a superconducting circuit
Aron Vanselow, Brieuc Beauseigneur, Louis Lattier +5
Over the past decade, autonomous stabilization of bosonic qubits has emerged as a promising approach for hardware-efficient protection of quantum information. However, applying the…
Mixing of counterpropagating signals in a traveling-wave Josephson device
Matthieu Praquin, Anthony Giraudo, Vincent Lienhard +4
Light waves do not interact in vacuum, but may mix through various parametric processes when traveling in a nonlinear medium. In particular, a high-amplitude wave can be leveraged…
Spectral signature of high-order photon processes enhanced by Cooper-pair pairing
W. C. Smith, A. Borgognoni, M. Villiers +7
Inducing interactions between individual photons is key for photonic quantum information and studying many-body photon states. Superconducting circuits are well suited to combine s…
High-sensitivity AC-charge detection with a MHz-frequency fluxonium qubit
B. -L. Najera-Santos, R. Rousseau, K. Gerashchenko +15
Owing to their strong dipole moment and long coherence times, superconducting qubits have demonstrated remarkable success in hybrid quantum circuits. However, most qubit architectu…
Quantum control of a cat-qubit with bit-flip times exceeding ten seconds
Ulysse Réglade, Adrien Bocquet, Ronan Gautier +14
Quantum bits (qubits) are prone to several types of errors due to uncontrolled interactions with their environment. Common strategies to correct these errors are based on architect…
Observation of Josephson Harmonics in Tunnel Junctions
Dennis Willsch, Dennis Rieger, Patrick Winkel +27
Approaches to developing large-scale superconducting quantum processors must cope with the numerous microscopic degrees of freedom that are ubiquitous in solid-state devices. State…
High-performance repetition cat code using fast noisy operations
Francois-Marie Le Régent, Camille Berdou, Zaki Leghtas +2
Bosonic cat qubits stabilized by two-photon driven dissipation benefit from exponential suppression of bit-flip errors and an extensive set of gates preserving this protection. The…
Dynamically enhancing qubit-photon interactions with anti-squeezing
M. Villiers, W. C. Smith, A. Petrescu +7
The interaction strength of an oscillator to a qubit grows with the oscillator's vacuum field fluctuations. The well known degenerate parametric oscillator has revived interest in…
One hundred second bit-flip time in a two-photon dissipative oscillator
C. Berdou, A. Murani, U. Reglade +19
Current implementations of quantum bits (qubits) continue to undergo too many errors to be scaled into useful quantum machines. An emerging strategy is to encode quantum informatio…
Staggered spin-orbit interaction in a nanoscale device
L. C. Contamin, T. Cubaynes, W. Legrand +9
The coupling of the spin and the motion of charge carriers stems directly from the atomic structure of a conductor. It has become an important ingredient for the emergence of topol…
Energy-participation quantization of Josephson circuits
Zlatko K. Minev, Zaki Leghtas, Shantanu O. Mundhada +3
Superconducting microwave circuits incorporating nonlinear devices, such as Josephson junctions, are one of the leading platforms for emerging quantum technologies. Increasing circ…
Multiplexed photon number measurement
Antoine Essig, Quentin Ficheux, Théau Peronnin +6
When a two-level system -- a qubit -- is used as a probe of a larger system, it naturally leads to answering a single yes-no question about the system state. Here we propose a meth…
Theory of interactions between cavity photons induced by a mesoscopic circuit
Audrey Cottet, Zaki Leghtas
We use a quantum path integral approach to describe the behavior of a microwave cavity coupled to a dissipative mesoscopic circuit. We integrate out the mesoscopic electronic degre…
Exponential suppression of bit-flips in a qubit encoded in an oscillator
Raphaël Lescanne, Marius Villiers, Théau Peronnin +6
A quantum system interacts with its environment, if ever so slightly, no matter how much care is put into isolating it. As a consequence, quantum bits (qubits) undergo errors, putt…
Highly coherent spin states in carbon nanotubes coupled to cavity photons
T. Cubaynes, M. R. Delbecq, M. C. Dartiailh +8
Spins confined in quantum dots are considered as a promising platform for quantum information processing. While many advanced quantum operations have been demonstrated, experimenta…
Detecting itinerant microwave photons with engineered non-linear dissipation
Raphaël Lescanne, Samuel Deléglise, Emanuele Albertinale +6
Single photon detection is a key resource for sensing at the quantum limit and the enabling technology for measurement based quantum computing. Photon detection at optical frequenc…
Structural instability of driven Josephson circuits prevented by an inductive shunt
Lucas Verney, Raphaël Lescanne, Michel H. Devoret +2
Superconducting circuits are a versatile platform to implement a multitude of Hamiltonians which perform quantum computation, simulation and sensing tasks. A key ingredient for rea…
Observing the escape of a driven quantum Josephson circuit into unconfined states
Raphaël Lescanne, Lucas Verney, Quentin Ficheux +4
Josephson circuits have been ideal systems to study complex non-linear dynamics which can lead to chaotic behavior and instabilities. More recently, Josephson circuits in the quant…
Demonstration of an effective ultrastrong coupling between two oscillators
Danijela Marković, Sébastien Jezouin, Quentin Ficheux +6
When the coupling rate between two quantum systems becomes as large as their characteristic frequencies, it induces dramatic effects on their dynamics and even on the nature of the…
Generation of discord through a remote joint continuous variable measurement
E. Zalys-Geller, A. Narla, S. Shankar +5
In quantum mechanics, continuously measuring an observable steers the system into one eigenstate of that observable. This property has interesting and useful consequences when the…