Publications (21)
Electron-spin spectral diffusion in an erbium doped crystal at millikelvin temperatures
Milos RanÄiÄ, Marianne Le Dantec, Sen Lin +9
Erbium-doped crystals offer a versatile platform for hybrid quantum devices because they combine magnetically-sensitive electron-spin transitions with telecom-wavelength optical tr…
Cyclically operated Single Microwave Photon Counter with sensitivity
Léo Balembois, Jaime Travesedo, Louis Pallegoix +7
Single photon detection played an important role in the development of quantum optics. Its implementation in the microwave domain is challenging because the photon energy is 5 orde…
Design of a Cooper pair box electrometer for application to solid-state and astroparticle physics
Leandro Tosi, Denis Vion, Hélène le Sueur
We describe the design and principle of operation of a fast and sensitive electrometer operated at millikelvin temperatures, which aims at replacing conventional semiconducting cha…
Individual solid-state nuclear spin qubits with coherence exceeding seconds
James O'Sullivan, Jaime Travesedo, Louis Pallegoix +14
The ability to coherently control and read out qubits with long coherence times in a scalable system is a crucial requirement for any quantum processor. Nuclear spins in the solid…
Single electron-spin-resonance detection by microwave photon counting
Zhiren Wang, Léo Balembois, Milos RanÄiÄ +10
Electron spin resonance (ESR) spectroscopy is the method of choice for characterizing paramagnetic impurities, with applications ranging from chemistry to quantum computing, but it…
The Bright Side of Coulomb Blockade
Max Hofheinz, Fabien Portier, Quentin Baudouin +5
We explore the photonic (bright) side of dynamical Coulomb blockade (DCB) by measuring the radiation emitted by a dc voltage-biased Josephson junction embedded in a microwave reson…
Manipulating Fock states of a harmonic oscillator while preserving its linearity
Kristinn Juliusson, Simon Bernon, Xin Zhou +7
We present a new scheme for controlling the quantum state of a harmonic oscillator by coupling it to an anharmonic multilevel system (MLS) with first to second excited state transi…
Noise Mitigation in Single Microwave Photon Counting by Cascaded Quantum Measurements
Alexandre S. May, Leo Sutevski, Jeanne Solard +7
While single-photon counting is routinely achieved in the optical domain, operational single microwave photon detectors (SMPDs) have only recently been demonstrated. SMPDs are crit…
Tunable microwave impedance matching to a high impedance source using a Josephson metamaterial
Carles Altimiras, Olivier Parlavecchio, Philippe Joyez +4
We report the efficient coupling of a microwave circuit to a high impedance conductor. We use an impedance transformer consisting of a co-planar resonator whose inn…
Flux Qubits with Long Coherence Times for Hybrid Quantum Circuits
Michael Stern, Gianluigi Catelani, Yuimaru Kubo +5
We present measurements of superconducting flux qubits embedded in a three dimensional copper cavity. The qubits are fabricated on a sapphire substrate and are measured by coupling…
Radiative cooling of a spin ensemble
Bartolo Albanese, Sebastian Probst, Vishal Ranjan +8
Physical systems reach thermal equilibrium through energy exchange with their environment, and for spins in solids the relevant environment is almost always the host lattice in whi…
Pulsed electron spin resonance spectroscopy in the Purcell regime
Vishal Ranjan, Sebastian Probst, Bartolo Albanese +8
When spin relaxation is governed by spontaneous emission of a photon into the resonator used for signal detection (the Purcell effect), the relaxation time depends on the spi…
Single-shot qubit readout in circuit Quantum Electrodynamics
François Mallet, Florian R. Ong, Agustin Palacios-Laloy +4
The future development of quantum information using superconducting circuits requires Josephson qubits [1] with long coherence times combined to a high-fidelity readout. Major prog…
Enhancing the sensitivity of single microwave photon detection with bandwidth tunability
Louis Pallegoix, Jaime Travesedo, Alexandre S. May +4
We report on the characteristics of a microwave photon counter device based on a superconducting transmon qubit. Its design is similar to [arXiv:2307.03614], with an additional ban…
Twenty-three millisecond electron spin coherence of erbium ions in a natural-abundance crystal
Marianne Le Dantec, MiloÅ¡ RanÄiÄ, Sen Lin +12
Erbium ions doped into crystals have unique properties for quantum information processing, because of their optical transition at 1.5 m and of the large magnetic moment of thei…
Detecting spins with a microwave photon counter
Emanuele Albertinale, Léo Balembois, Eric Billaud +7
Quantum emitters respond to resonant illumination by radiating electromagnetic fields. A component of these fields is phase-coherent with the driving tone, while another one is inc…
Electron Spin Resonance spectroscopy with femtoliter detection volume
Vishal Ranjan, Sebastian Probst, Bartolo Albanese +5
We report electron spin resonance measurements of donors in silicon at millikelvin temperatures using a superconducting planar micro-resonator and a Josephson Parametric Ampli…
Experimental violation of a Bell's inequality in time with weak measurement
Agustin Palacios-Laloy, François Mallet, François Nguyen +4
The violation of J. Bell's inequality with two entangled and spatially separated quantum two- level systems (TLS) is often considered as the most prominent demonstration that natur…
Month-long-lifetime microwave spectral holes in an erbium-doped scheelite crystal at millikelvin temperature
Zhiren Wang, Sen Lin, Marianne Le Dantec +9
Rare-earth-ion (REI) ensembles in crystals have remarkable optical and spin properties characterized by narrow homogeneous linewidths relative to the inhomogeneous ensemble broaden…
Microwave fluorescence detection of spin echoes
Eric Billaud, Leo Balembois, Marianne Le Dantec +9
Counting the microwave photons emitted by an ensemble of electron spins when they relax radiatively has recently been proposed as a sensitive method for electron paramagnetic reson…
Single-shot qubit readout in circuit Quantum Electrodynamics
François Mallet, Florian R. Ong, Agustin Palacios-Laloy +4
The future development of quantum information using superconducting circuits requires Josephson qubits with long coherence times combined to a high-delity readout. Major progress i…