A5075174576- Quantum and electron transport phenomena
- IPv6, Mobility, Handover, Networks, Security
- Quantum Information and Cryptography
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum Computing Algorithms and Architecture
- Vehicular Ad Hoc Networks (VANETs)
- Quantum many-body systems
- Physics of Superconductivity and Magnetism
- Mechanical and Optical Resonators
- Neural Networks and Reservoir Computing
- Mobile Ad Hoc Networks
- Mobile Agent-Based Network Management
- Wireless Body Area Networks
- Quantum, superfluid, helium dynamics
- Topological Materials and Phenomena
- Wireless Networks and Protocols
- Opportunistic and Delay-Tolerant Networks
- Network Traffic and Congestion Control
- Wireless Communication Networks Research
- Advanced Condensed Matter Physics
- IoT and Edge/Fog Computing
- Automotive and Human Injury Biomechanics
- Caching and Content Delivery
- Advanced Text Analysis Techniques
- Sentiment Analysis and Opinion Mining
École Normale Supérieure
2025
Institut national de recherche en informatique et en automatique
2025
École Nationale Supérieure des Mines de Paris
2025
Université Paris Sciences et Lettres
2022-2025
Sorbonne Université
2022-2025
Universitatea Națională de Știință și Tehnologie Politehnica București
2009-2024
École Normale Supérieure - PSL
2022-2024
Centre National de la Recherche Scientifique
2013-2024
Université de Sherbrooke
2020-2023
Laboratoire de Physique de l'ENS
2022-2023
We review recent developments concerning non-equilibrium quantum dynamics and many-body physics with light, in superconducting circuits Josephson analogues. start impurity models summarizing the effect of dissipation driving system. mention theoretical experimental efforts to characterize these systems. show how junction systems can implement equivalent Kondo microwave photons. The is characterized by a renormalized light-frequency peak Rayleigh elastic transmission photon. also address...
Qubit measurement is an essential step in any quantum computation. In circuit electrodynamics, a leading computer architecture, qubit readout commonly one of the longest and lowest-fidelity processes. The authors numerically explore dynamics driven transmon-resonator system under strong, nearly resonant drives to better understand this issue. They find clear signs transmon ``ionization'', which escapes its confining potential influence drive, semiclassical methods then reveal mechanism. This...
Transmon qubits are ubiquitously used in superconducting quantum information processor architectures. Strong drives required to realize fast, high-fidelity, gates and measurements, including parametrically activated processes. Here, we show that even off-resonant drives, regimes routinely experiments, can cause strong modifications the structure of transmon spectrum rendering a large part it chaotic. Accounting for full nonlinear dynamics Floquet-Markov formalism, find these chaotic states,...
The interaction strength of an oscillator to a qubit grows with the oscillator's vacuum field fluctuations. well known degenerate parametric has revived interest in regime strongly detuned squeezing, where its eigenstates are squeezed Fock states. Owing these amplified fluctuations, it was recently proposed that squeezing this would dynamically boost qubit-photon interactions. In superconducting circuit experiment, we observe two-fold increase dispersive between and at 5.5 dB demonstrating...
We introduce a generic bosonic model exemplifying that (spin) Meissner currents can persist in insulating phases of matter. consider two species interacting bosons on lattice. Our exhibits separation charge (total density) and spin (relative density): the sector is gapped Mott insulator phase with total density one, while remains superfluid due to interspecies conversion. Coupling gauge fields yields effect reflecting long-range coherence. investigate resulting diagram describe other...
We theoretically investigate a photonic Kagome lattice which can be realized in microwave cavity arrays using current technology. The exhibits an exotic band structure with three bands one of made completely flat. presence artificial gauge fields allows to emulate topological phases and induce chiral edge modes coexist inside the energy gap flat that is topologically trivial. By tuning fluxes or disorder, also acquire bandwidth allowing coexistence between bulk extended states; this case...
We introduce generic bosonic models exemplifying that chiral Meissner currents can persist in insulating phases of matter. first consider interacting bosons on a two-leg ladder. The total density sector be gapped Mott insulator at odd-integer filling, while the relative remains superfluid due to interchain hopping. Coupling gauge fields yields pseudospin effect. show same phase arises if are replaced by spinful fermions confined Cooper pairs, and find dual fermionic with spinon currents....
Any quantum-confined electronic system coupled to the electromagnetic continuum is subject radiative decay and renormalization of its energy levels. When a cavity, these quantities can be strongly modified with respect their values in vacuum. Generally, this modification accurately captured by including only closest resonant mode cavity. In circuit quantum electrodynamics architecture, it is, however, found that rates are influenced far off-resonant modes. A multimode calculation accounting...
We study hard core bosons on a two-leg ladder lattice under the orbital effect of uniform magnetic field. At densities which are incommensurate with flux, ground state is Meissner state, or vortex depending strength flux. When density commensurate analytical arguments predict possibility to stabilize central charge $c=1$, precursor two-dimensional Laughlin at $\ensuremath{\nu}=1/2$. This differs from coupled wire construction in that there exists nonzero backscattering term edge Hamiltonian....
In this review, we provide an introduction to and overview of some more recent advances in real-time dynamics quantum impurity models their realizations devices. We focus on the Ohmic spin–boson related models, which describe a single spin-1/2 coupled with infinite collection harmonic oscillators. The topics are largely drawn from our efforts over past years, but also present few novel results. first part begin pedagogical dissipative spin at both high low temperatures. then driven regime...
Recent experiments in superconducting qubit systems have shown an unexpectedly strong dependence of the relaxation rate on readout drive power. This phenomenon limits maximum measurement strength and thus achievable speed fidelity. We address this problem here provide a plausible mechanism for drive-power rates. To end we introduce two-parameter perturbative expansion anharmonicity amplitude through unitary transformation technique introduced Part I. approach naturally reveals...
The ability to perform fast, high-fidelity entangling gates is a requirement for viable quantum processor. In practice, achieving fast often comes with the penalty of strong-drive effects that are not captured by rotating-wave approximation. These can be analyzed in simulations gate protocol, but those computationally costly and hide physics at play. Here, we show how efficiently extract parameters directly solving Floquet eigenproblem using exact numerics perturbative analytical approach....
This article aims to analyze network mobility issues and requirements in the context of beyond-3G systems, explore various approaches solutions, including basic approach being pursued within IETF NEMO working group. It starts with understanding scenarios. Then principle mobile IP is revisited serve as basis for subsequent discussion on advanced support. Finally, research activities EU project OverDRiVE are reported.
Recent experiments in ultracold atoms and photonic systems have realized lattice models with artificial gauge fields. Here the authors introduce a bosonic version of Haldane Hubbard Hamiltonian on honeycomb use several analytical numerical methods to uncover consistent picture phase diagram. Three distinct phases are found: chiral superfluid, uniform plaquette Mott insulator, all which should be accessible future experiments.
The dynamics of a weakly anharmonic superconducting qubit in complex electromagnetic environment is generally well described by an effective multimode Kerr Hamiltonian at sufficiently weak excitation. This can be embedded master equation with losses determined the details environment. Recent experiments indicate, however, that when circuit driven microwave signals populating system high excitations, observed relaxation rates appear to substantially different from expectations based on alone....
Time-dependent eigenstates of Hamiltonians offer a large degree tunability, which can be leveraged to operate single- and two-qubit gates so that they stay dynamically protected from noise. However, the usual analytical techniques for describing these are limited systems subject drives different frequencies. Thus authors generalize Floquet approach understanding such systems, provide protocols robustly control measure complex systems.
The measurement of quantum entanglement in many-body systems remains challenging. One experimentally relevant fact about is that whose degrees freedom map to free fermions with conserved total particle number, exact relations hold relating the full counting statistics associated bipartite charge fluctuations and sequence Rényi entropies. We draw a correspondence between spectrum, through In case integer Hall effect, we show it possible reproduce generic features spectrum from second cumulant...
Recent vehicular networking activities include public vehicle to vehicle/infrastructure (V2X) large scale deployment, machine-to-machine (M2M) integration scenarios and more automotive applications. eHealth is about the use of Internet disseminate health related information, one promising Things (IoT) Combining record transmit a patient's vital signs special telemedicine application that helps hospital resident professionals optimally prepare admittance. From perspective, this typical...
The exploration of highly connected networks qubits is invaluable for implementing various quantum algorithms and simulations, as it allows entangling with reduced circuit depth. Here, we demonstrate a multiqubit sideband tone-assisted Rabi-driven gate. Our scheme inspired by the ion-qubit Mølmer-Sørensen gate mediated shared photonic mode superconducting qubits, which relaxes restrictions on qubit frequencies during fabrication supports scalability. We achieve two-qubit maximum state...
We demonstrate flux-bias locking and operation of a gradiometric fluxonium artificial atom using two symmetric granular aluminum (grAl) loops to implement the superinductor. The shows orders magnitude suppression sensitivity homogeneous magnetic fields, which can be an asset for hybrid quantum systems requiring strong field biasing. By cooling down device in external while crossing metal-to-superconductor transition, locked either at $0$ or $\Phi_0/2$ effective flux bias, corresponding even...
We study the dynamics of a transmon qubit that is capacitively coupled to an open multimode superconducting resonator. Our effective equations are derived by eliminating resonator degrees freedom while encoding their effect in Green's function electromagnetic background. account for dissipation exactly employing spectral representation terms set non-Hermitian modes and show it possible derive Heisenberg-Langevin without resorting rotating wave, two level or Markov approximations. A...