Samuel Boutin
A5066680594- Topological Materials and Phenomena
- Quantum Information and Cryptography
- Quantum and electron transport phenomena
- Cold Atom Physics and Bose-Einstein Condensates
- Photonic and Optical Devices
- Model-Driven Software Engineering Techniques
- Atomic and Subatomic Physics Research
- Real-Time Systems Scheduling
- Semiconductor Quantum Structures and Devices
- Safety Systems Engineering in Autonomy
- Quantum optics and atomic interactions
- Graphene research and applications
- Physics of Superconductivity and Magnetism
- Distributed systems and fault tolerance
- Mechanical and Optical Resonators
- Formal Methods in Verification
- Advanced Condensed Matter Physics
- Quantum many-body systems
- Logic, programming, and type systems
- Quantum Computing Algorithms and Architecture
- Advanced Semiconductor Detectors and Materials
- Embedded Systems Design Techniques
- Photoacoustic and Ultrasonic Imaging
- Advanced NMR Techniques and Applications
- Risk and Safety Analysis
Microsoft (United States)
2021-2025
Regroupement Québécois sur les Matériaux de Pointe
2016-2021
Université de Sherbrooke
2012-2021
Knowledge Foundation
2018
Public Knowledge
2010
Institut de Radioprotection et de Sûreté Nucléaire
2009
Renault (France)
2000
Cat states of the microwave field stored in high-Q resonators show great promise for robust encoding and manipulation quantum information. Here we propose an approach to efficiently prepare such cat a Kerr-nonlinear resonator by use two-photon drive. We that this preparation is against single-photon loss. moreover find it possible remove undesirable phase evolution induced Kerr nonlinearity using drive appropriate amplitude phase. Finally, present universal set logical gates can be performed...
Topological phases of matter can enable highly stable qubits with small footprints, fast gate times, and digital control. These hardware-protected must be fabricated a material combination in which topological phase reliably induced. The challenge: disorder destroy the obscure its detection. This paper reports on devices low enough to pass gap protocol, thereby demonstrating gapped superconductivity paving way for new qubit.
We present an experimental realization of resonance fluorescence in squeezed vacuum. strongly couple microwave-frequency light to a superconducting artificial atom and detect the resulting with high resolution enabled by broadband traveling-wave parametric amplifier. investigate spectra weak strong driving regimes, observing up 3.1 dB reduction linewidth below ordinary vacuum level dramatic dependence Mollow triplet spectrum on relative phase fields. Our results are excellent agreement...
We observe measurement-induced qubit state mixing in a transmon dispersively coupled to planar readout cavity. Our results indicate that dephasing noise at the qubit-readout detuning frequency is up-converted by photons cause spurious transitions, thus limiting nondemolition character of readout. Furthermore, we use transition rate as tool extract an equivalent flux spectral density $f\ensuremath{\sim}1\text{ }\text{ }\mathrm{GHz}$ and find agreement with values extrapolated from...
Single-mode Josephson junction-based parametric amplifiers are often modeled as perfect and squeezers. We show that, in practice, the gain, quantum efficiency, output field squeezing of these devices limited by usually neglected higher-order corrections to idealized model. To arrive at this result, we derive leading lumped-element amplifier three common pumping schemes: monochromatic current pump, bichromatic flux pump. that correction for last two schemes is a single Kerr-type quartic term,...
We describe a concrete device roadmap towards fault-tolerant quantum computing architecture based on noise-resilient, topologically protected Majorana-based qubits. Our encompasses four generations of devices: single-qubit that enables measurement-based qubit benchmarking protocol; two-qubit uses braiding to perform Clifford operations; an eight-qubit can be used show improvement operation when performed logical qubits rather than directly physical qubits; and topological array supporting...
As the complexity of mesoscopic quantum devices increases, simulations are becoming an invaluable tool for understanding their behavior. This is especially true superconductor-semiconductor heterostructures used to build Majorana-based topological qubits, where quantitatively interplay superconductivity, disorder, semiconductor dots, Coulomb blockade and noise has been essential progress on device design interpretation measurements. In this paper, we describe a general framework simulate...
We study an implementation of the open GRAPE (Gradient Ascent Pulse Engineering) algorithm well suited for large quantum systems. While typical implementations optimal control algorithms systems rely on explicit matrix exponential calculations, our avoids these operations leading to a polynomial speed-up in cases interest. This speed-up, as reduced memory requirements implementation, are illustrated by comparison standard GRAPE. As practical example, we apply this open-system optimization...
Solid-state experimental realizations of Majorana bound states are based on materials with strong intrinsic spin-orbit interactions. In this paper, we explore an alternative approach where coupling is induced artificially through a nonuniform magnetic field that originates from array micromagnets. Using recently developed optimization algorithm, find suitable magnet geometries for the emergence topological superconductivity in wires without coupling. We confirm robustness against disorder...
Motivated by recent nuclear magnetic resonance (NMR) experiments, we present a microscopic $s{p}^{3}$ tight-binding model calculation of the NMR shifts in bulk ${\mathrm{Bi}}_{2}{\mathrm{Se}}_{3}$ and ${\mathrm{Bi}}_{2}{\mathrm{Te}}_{3}$. We compute contact, dipolar, orbital core polarization contributions to carrier-density-dependent part $^{209}\mathrm{Bi},^{125}\mathrm{Te}$, $^{77}\mathrm{Se}$. The spin-orbit coupling layered crystal structure result contact Knight shift with strong...
Product service systems (PSS) can be understood as an innovation / business strategy that includes a set of products and services are realized by actor network. More recently, PSS comprise System Systems (SoS) have been increasing interest, notably in the transportation (autonomous vehicle infrastructures, multi-modal transportation) energy sector (smart grids). Architecting such PSS-SoS goes beyond classic SoS engineering, they often driven new technology, without priori client network,...
The fusion of non-Abelian anyons or topological defects is a fundamental operation in measurement-only quantum computation. In superconductors, this amounts to determination the shared fermion parity Majorana zero modes. As step towards this, we implement single-shot interferometric measurement indium arsenide-aluminum heterostructures with gate-defined nanowire. interferometer formed by tunnel-coupling proximitized nanowire dots. causes state-dependent shift these dots' capacitance up 1 fF....
Recent progress toward the fabrication of Majorana-based qubits has sparked need for systematic approaches to optimize experimentally relevant parameters realization robust Majorana bound states. Here, we introduce an efficient numerical method real-space optimization tunable parameters, such as electrostatic potential profiles and magnetic field textures, in wires. Combining ideas from quantum control transport, our algorithm, applicable any noninteracting tight-binding model, operates on a...
We present measurements and simulations of semiconductor-superconductor heterostructure devices that are consistent with the observation topological superconductivity Majorana zero modes. The fabricated from high-mobility two-dimensional electron gases in which quasi-one-dimensional wires defined by electrostatic gates. These enable local non-local transport properties have been optimized via extensive to ensure robustness against non-uniformity disorder. Our main result is several devices,...
The coherent superposition of non-orthogonal fermionic Gaussian states has been shown to be an efficient approximation the ground quantum impurity problems [Bravyi and Gosset,Comm. Math. Phys.,356 451 (2017)]. We present a practical approach for performing variational calculation based on such states. Our method is approximate imaginary-time equations motion that decouple dynamics each state forming ansatz. It independent lattice connectivity model implementation highly parallelizable. To...
The recent discovery of spin and orbital textures in nonmagnetic crystals with inversion symmetry has broadened the scope for spintronics applications. These so-called hidden polarizations are however difficult to probe, part because they average zero within each unit cell. In this work, authors show that a bulk detection intra-unit cell can be achieved nuclear magnetic resonance by splitting, an electric current, peak partner nuclei. proposal is illustrated numerical results...
We present a many-body exact diagonalization study of the $\mathbb{Z}_2$ and $\mathbb{Z}_4$ Josephson effects in circuit quantum electrodynamics architectures. Numerical simulations are conducted on Kitaev chain junctions hosting nearest-neighbor Coulomb interactions. The low-energy effective theory highly transparent is shown to be identical that created at edge spin-Hall insulator. By capacitively coupling interacting junction microwave resonator, we predict signatures fractional cavity...