A5061734554- Quantum and electron transport phenomena
- Physics of Superconductivity and Magnetism
- Quantum many-body systems
- Topological Materials and Phenomena
- Quantum Information and Cryptography
- Advanced Thermodynamics and Statistical Mechanics
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum Computing Algorithms and Architecture
- Semiconductor materials and devices
- Semiconductor Quantum Structures and Devices
- Advancements in Semiconductor Devices and Circuit Design
- Mechanical and Optical Resonators
- Magnetic properties of thin films
- Surface and Thin Film Phenomena
- Magnetic Field Sensors Techniques
- Graphene research and applications
- Atomic and Subatomic Physics Research
- Theoretical and Computational Physics
- Quantum, superfluid, helium dynamics
- Molecular Junctions and Nanostructures
- Gender, Feminism, and Media
- Quantum Mechanics and Non-Hermitian Physics
- Crystallography and Radiation Phenomena
- Thermal properties of materials
- Magneto-Optical Properties and Applications
CEA Grenoble
2021-2025
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2021-2025
Université Grenoble Alpes
2021-2025
Institut polytechnique de Grenoble
2022-2024
Laboratoire Modélisation et Exploration des Matériaux
2023
University of Geneva
2017-2022
Institut de Recherche Interdisciplinaire de Grenoble
2022
Freie Universität Berlin
2014-2018
Université Paris Cité
2011-2014
École Normale Supérieure
2011-2014
We devise a Floquet theory of longitudinal and dispersive readout in circuit quantum electrodynamics (cQED). By studying qubits coupled to cavity photons driven at the resonance frequency ω_{r}, we establish universal connection between qubit ac Stark shift coupling photons. find that g_{∥} is controlled by slope as function driving strength A_{q}, while χ depends on its curvature. The two quantities become proportional each other weak drive limit (A_{q}→0). Our approach unifies adiabatic...
The interplay of interactions and strong disorder can lead to an exotic quantum many-body localized (MBL) phase matter. Beyond the absence transport, MBL has distinctive signatures, such as slow dephasing logarithmic entanglement growth; they commonly result in subtle modifications dynamics, rendering their measurement challenging. Here, we experimentally characterize these properties a system coupled superconducting qubits. By implementing sensitive techniques, map out structure local...
We study the transport properties of generic out-of-equilibrium quantum systems connected to fermionic reservoirs. develop a new method, based on an expansion current in terms inverse system size and out equilibrium formulations such as Keldysh technique Meir-Wingreen formula. Our method allows simple compact derivation for large class showing diffusive/ohmic behavior. In addition, we obtain exact solutions stochastic Hamiltonians (QSHs) with time space dependent noise, using self consistent...
The Hall effect, which originates from the motion of charged particles in magnetic fields, has deep consequences for description materials, extending far beyond condensed matter. Understanding such an effect interacting systems represents a fundamental challenge, even small fields. In this work, we used atomic quantum simulator tracked ultracold fermions two-leg ribbons threaded by artificial Through controllable quench dynamics, measured response range synthetic tunneling and interaction...
Exact formulas to describe particle and heat transport in generic noninteracting fermionic systems undergoing continuous monitoring driven by biased reservoirs show the possibility achieve measurement-induced power or cooling.
The large spin-orbit interaction of holes in semiconductors is key to achieving strong spin-photon coupling spin circuit-QED experiments. Here, the authors show that for a single hole this ``reciprocally sweet'', meaning can be tuned from fully transverse (allowing coherent rotations) longitudinal (modulating resonance frequency). Based on coupling, highlight how distant spin-spin and parametrically driven readout achieved.
We present a generic, compact formula for the current flowing in interacting and noninteracting systems which are driven out of equilibrium by biased reservoirs described Lindblad jump operators. show that, limit high temperature chemical potential, our is equivalent to well-known Meir-Wingreen formula, describes through system connected fermionic baths, therefore bridging gap between two formalisms. Our formulation gives systematic way address transport properties correlated strongly...
We consider a set of fully connected spin models that display first- or second-order transitions and for which we compute the ground-state entanglement in thermodynamical limit. analyze several measures (concurrence, R\'enyi entropy, negativity) show that, general, discontinuous lead to jump these quantities at transition point. Interestingly, also find examples where this is not case.
We investigate the dynamical charge response of Anderson model viewed as a quantum RC circuit. Applying low-energy effective Fermi liquid theory, generalized Korringa-Shiba formula is derived at zero temperature, and relaxation resistance expressed solely in terms static susceptibilities which are accessible by Bethe ansatz. identify giant intermediate magnetic fields related to destruction Kondo singlet. The scaling properties this peak computed analytically regime. also show that fades...
This paper is a corrected version of Phys. Rev. B 95, 165404 (2017), which we have retracted because it contained trivial but fatal sign error that lead to incorrect conclusions. We extend recently developed Fermi liquid (FL) theory for the asymmetric single-impurity Anderson model [C. Mora et al., 92, 075120 (2015)] case an arbitrary local magnetic field. To describe system's low-lying quasiparticle excitations values bare Hamiltonian's parameters, construct effective low-energy FL...
The interplay of interactions and strong disorder can lead to an exotic quantum many-body localized (MBL) phase. Beyond the absence transport, MBL phase has distinctive signatures, such as slow dephasing logarithmic entanglement growth; they commonly result in subtle modification dynamics, making their measurement challenging. Here, we experimentally characterize these properties a system coupled superconducting qubits. By implementing sensitive techniques, map out structure local integrals...
We numerically investigate the distribution of Drude weights $D$ many-body states in disordered one-dimensional interacting electron systems across transition to a localized phase. are proportional spectral curvatures induced by magnetic fluxes mesoscopic rings. They offer method relate phase transport properties. In delocalized regime, we find that weight at fixed disorder configuration agrees well with random-matrix-theory prediction $P(D) \propto (\gamma^2+D^2)^{-3/2}$, although width...
Coulomb interactions strongly influence the energy spectrum and wave functions of few electrons or holes in single quantum dots. Indeed, for weak confinement potentials, repulsion splits apart particles, leading to formation Wigner molecules. Here, authors discuss how anisotropy favors molecularization compare impact on readout exchange spin qubits different semiconductor materials.
An extended regime of quantum phases is identified in which the Hall response becomes independent interaction strength and particle statistics, a result remains true for both interacting bosons fermions.
We devise a semiclassical model to describe the transport properties of low-dimensional fermionic lattices under influence external quantum stochastic noise. These systems behave as resistors, where bulk particle is diffusive and obeys Ohm/Fick's law. Here, we extend previous exact studies beyond one-dimensional limit ladder geometries explore different dephasing mechanisms that are relevant physical systems, from solid-state cold atoms. show how description useful explain nontrivial...
We formulate a general approach for studying the low-frequency response of an interacting quantum dot connected to leads in presence oscillating gate voltages. The energy dissipated is characterized by charge relaxation resistance, which under loose assumption Fermi liquid behavior at low energy, shown depend only on static susceptibilities. predictions scattering theory are recovered noninteracting limit while effect interactions simply replace densities states susceptibilities formulas. In...
We study energy and particle transport for one-dimensional strongly interacting bosons through a ballistic single channel connecting two atomic reservoirs. show the emergence of particle- energy-current separation, leading to violation Wiedemann-Franz law. As consequence, we predict different time scales equilibration temperature imbalances between Going beyond linear spectrum approximation, thermoelectric effects, which could be controlled by either tuning interactions or temperature. Our...
Abstract Spin qubits in gate-defined silicon quantum dots are receiving increased attention thanks to their potential for large-scale computing. Readout of such spin is done most accurately and scalably via Pauli blockade (PSB), however, various mechanisms may lift PSB complicate readout. In this work, we present an experimental study a multi-electron low-symmetry double dot (DQD) nanowires. We report on the observation non-symmetric PSB, manifesting as blockaded tunneling when projected one...
A path integral approach is used to derive a closed analytical expression for the Kondo temperature of SU(4) symmetrical Anderson model. In contrast SU(2) case, prefactor found display peculiar orbital-energy (gate voltage) dependence, reflecting presence various mixed valence fixed points. Our expressions are tested against and confirmed by numerical renormalization group computations.
We study the ballistic-to-diffusive transition induced by weak breaking of integrability in a boundary-driven XXZ spin-chain. Studying evolution spin current density $\mathcal J^s$ as function system size $L$, we show that, accounting for boundary effects, has non-trivial universal behavior close to XX limit. It is controlled scattering length $L^*\propto V^{-2}$, where $V$ strength term. In model, interplay interactions controls emergence transient "quasi-ballistic" regime at scales much...
We consider the full nonequilibrium response of a mesoscopic capacitor in large transparency limit, exactly solving model with electron-electron interactions appropriate for cavity quantum Hall regime. For coupled to electron reservoir via an ideal point contact, we show that any time-dependent gate voltage ${V}_{\mathrm{g}}(t)$ is strictly linear ${V}_{\mathrm{g}}$. analyze charge and current sudden shift find this not captured by simple circuit analogy. In particular, limit strong change...
We extend a recently developed Fermi liquid (FL) theory for the asymmetric single-impurity Anderson model [C. Mora et al., Phys. Rev. B 92, 075120 (2015)] to case of an arbitrary local magnetic field. To describe system's low-lying quasiparticle excitations values bare Hamiltonian's parameters, we construct effective low-energy FL Hamiltonian whose parameters are expressed in terms level's spin-dependent ground-state occupations and their derivatives with respect level energy These...