A5025299661- Quantum Information and Cryptography
- Mechanical and Optical Resonators
- Quantum Mechanics and Applications
- Quantum and electron transport phenomena
- Neutrino Physics Research
- Photonic and Optical Devices
- Noncommutative and Quantum Gravity Theories
- Atomic and Subatomic Physics Research
- Particle physics theoretical and experimental studies
- Magnetic properties of thin films
- Topological Materials and Phenomena
- Dark Matter and Cosmic Phenomena
- Advanced MEMS and NEMS Technologies
- Quantum Mechanics and Non-Hermitian Physics
- Advanced NMR Techniques and Applications
- Graphene research and applications
- Quantum optics and atomic interactions
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum Electrodynamics and Casimir Effect
- Quantum, superfluid, helium dynamics
- Orbital Angular Momentum in Optics
- Spectroscopy and Quantum Chemical Studies
- Acoustic Wave Resonator Technologies
- Advanced Fiber Laser Technologies
- Quantum Computing Algorithms and Architecture
Institut de Science et d'Ingénierie Supramoléculaires
2024
Université de Strasbourg
2023-2024
Max Planck Institute for the Science of Light
2019-2023
Universidade Federal de São Carlos
2012-2018
University of Salerno
2018
Magnonics addresses the physical properties of spin waves and utilizes them for data processing. Scalability down to atomic dimensions, operation in GHz-to-THz frequency range, utilization nonlinear nonreciprocal phenomena, compatibility with CMOS are just a few many advantages offered by magnons. Although magnonics is still primarily positioned academic domain, scientific technological challenges field being extensively investigated, proof-of-concept prototypes have already been realized...
Dynamical backaction resulting from radiation pressure forces in optomechanical systems has proven to be a versatile tool for manipulating mechanical vibrations. Notably, dynamical resulted the cooling of resonator its ground-state, driving phonon lasing, generation entangled states, and observation optical-spring effect. In certain magnetic materials, vibrations can interact with excitations (magnons) via magnetostrictive interaction, an analogous magnon-induced backaction. this article, we...
Generating non-classical states in macroscopic systems is a long standing challenge. A promising platform the context of this quest are novel hybrid based on magnetic dielectrics, where photons can couple strongly and coherently to excitations, although state therein yet be observed. We propose scheme generate magnetization cat state, i.e. quantum superposition two distinct directions, using conventional setup ferromagnet microwave cavity. Our uses ground an ellipsoid shaped magnet, which...
In the emerging field of cavity optomagnonics, photons are coupled coherently to magnons in solid-state systems. These new systems promising for implementing hybrid quantum technologies. Being able prepare Fock states such platforms is an essential step towards implementation information schemes. We propose a magnon-heralding protocol generate magnon state by detecting optical photon. Due peculiarities optomagnonic coupling, involves two distinct photon modes. Solving Langevin equations...
A large fraction of quantum science and technology requires low-temperature environments such as those afforded by dilution refrigerators. In these cryogenic environments, accurate thermometry can be difficult to implement, expensive, often calibration an external reference. Here, we theoretically propose a primary thermometer based on measurement hybrid system consisting phonons coupled via magnetostrictive interaction magnons. Thermometry is cross-correlation in which the spectrum...
The interaction between magnons and mechanical vibrations dynamically modifies the properties of oscillator, such as its frequency decay rate. Known dynamical backaction, this effect is basis for many theoretical protocols, entanglement generation or ground-state cooling. However, backaction also detrimental specific applications. Here, we demonstrate implementation a triple-resonance cavity magnomechanical measurement that fully evades effects. Through careful engineering, scattering rate...
The radiation pressure-like coupling between magnons and phonons in magnets can modify the phonon frequency (magnomechanical spring effect) decay rate decay) via dynamical backaction. Such effects have been recently observed by uniform magnon mode of a magnetic sphere (the Kittel mode) to microwave cavity. In particular, ability evade backaction was demonstrated [C.A. Potts et al., arXiv:2211.13766 [quant-ph] (2022)], requisite for applications such as magnomechanical based thermometry....
Quantum magnonics, an emerging field focusing on the study of magnons for quantum applications, requires precise measurement methods capable resolving single magnons.Existing techniques introduce additional dissipation channels and are not apt magnets in free space.Brillouin light scattering (BLS) is a well-established technique probing magnetization known its high sensitivity temporal resolution.The coupling between photons controlled by laser input, so it can be switched off when needed.In...
Currently, there is a growing interest in studying the coherent interaction between magnetic systems and electromagnetic radiation cavity, prompted partly by possible applications hybrid quantum systems. We propose multimode cavity optomagnonic system based on antiferromagnetic insulators, where optical photons couple coherently to two homogeneous magnon modes of antiferromagnet. These have frequencies typically THz range, regime so far mostly unexplored realm interactions, which makes...
The magnetoelastic coupling of magnetic and elastic excitations enables the generation waves carrying angular momentum. In a quantum picture, this corresponds to resonant conversion magnons chiral phonons vice versa. This study showcases process using simple versatile experimental platform consisting metallic thin film on crystalline substrate. These findings allow us impact crystal symmetry momentum transport by investigate phononic birefringence.
Abstract We characterize quantum correlations encoded in a three-flavor oscillating neutrino system by using both plane-wave and wave-packet approach. By means of the Complete Complementarity Relations (CCR) we study trade-off predictability, local coherence non-local terms relevant parameters, chosen from recent experiments. Although CCR describe very well contributions associated to bipartite correlations, an attempt promoting these relations include genuine tri-partite pure-state case...
Abstract We analyze quantum correlations and coherence in neutrino oscillations. To this end, we exploit complete complementarity relations (CCR) that fully characterize the interplay between different encoded a system both for pure mixed states. consider CCR oscillations case of plane-waves (pure state) wave packets (mixed state). In last find complex structure depending on mixing angle, show connection with non local advantage coherence, relevant quantifier coherence.
Reaching strong light-matter coupling in solid-state systems has long been pursued for the implementation of scalable quantum devices. Here, we put forward a system based on magnetized epsilon-near-zero (ENZ) medium, and show that between magnetic excitations (magnons) light can be achieved close to ENZ frequency due drastic enhancement magneto-optical response. We adopt phenomenological approach quantize electromagnetic field inside dispersive medium order obtain frequency-dependent magnons...
Achieving strong coupling between light and matter excitations in hybrid systems is a benchmark for the implementation of quantum technologies. We recently proposed [arXiv:2110.02984] that single-particle magnons can be realized magnetized epsilon-near-zero (ENZ) medium, which magneto-optical effects are enhanced. Here we present detailed derivation magnon-photon Hamiltonian dispersive media both degenerate non-degenerate optical modes, show enhancement near ENZ frequency. Moreover, to...
The effects of Lorentz boosts on the quantum entanglement encoded by a pair massive spin-$\frac{1}{2}$ particles are described according to covariant structure Dirac bispinors. system considered incorporates four degrees freedom: two them related bispinor intrinsic parity and other spin projection, i.e., particle helicity. Because natural multipartite involved, Meyer-Wallach global measure is preliminarily used for computing correlations, while separately freedom measured through negativity...
Abstract Massive Dirac particles are a superposition of left and right chiral components. Since chirality is not conserved quantity, the free Hamiltonian evolution induces quantum oscillations, phenomenon related to Zitterbewegung , trembling motion propagating particles. While observable for in relativistic dynamical regimes, oscillations become relevant when particle’s rest energy comparable its momentum. In this paper, we quantify effect on non-relativistic particle state described as...
Abstract We propose and numerically evaluate a protocol to generate an arbitrary quantum state of the magnetization in magnet. The involves repeatedly exciting frequency-tunable superconducting transmon transferring excitations magnet via microwave cavity. To avoid decay, must be much shorter than magnon lifetime. Speeding up by simply shortening pulses leads non-resonant leakage higher levels accompanied decoherence. discuss how correct for such leakages applying counter de-excite these...
The complete lattice-layer entanglement structure of Bernal-stacked bilayer graphene is obtained for the quantum system described by a tight-binding Hamiltonian which includes mass and bias voltage terms. Through suitable correspondence with parity-spin $SU(2)\ensuremath{\bigotimes}SU(2)$ Dirac Hamiltonian, when it brings up tensor pseudovector external field interactions, degrees freedom can be mapped into such two-qubit basis supports interpretation eigenstates as entangled ones in basis....
Developing schemes for efficient and broadband frequency conversion of quantum signals is an ongoing challenge in the field modern information. The coherent between microwave optical especially important milestone towards long-distance communication. In this work, we propose a two-stage protocol, employing resonant interaction magnetic mechanical excitations as mediator photons. Based on estimates coupling strengths under optimized conditions yttrium iron garnet, predict close to unity...
Quantum transition probabilities and quantum entanglement for two-qubit states of a four-level trapped ion system are computed time-evolving ionic driven by Jaynes-Cummings Hamiltonians with interactions mapped onto $\text{SU}(2)\ensuremath{\bigotimes}\text{SU}(2)$ group structure. Using the correspondence method simulating $3+1$ dimensional Dirac-like Hamiltonian bispinor particles into single ion, one preliminarily obtains analytical tools describing state as typical oscillation feature....
Abstract We study the evolution of quantum correlations in a lepton-antineutrino pair, as produced weak interactions (e.g. pion decay). Assuming an inital state entangled spins two particles, we show that both chiral and flavor (neutrino) oscillations affect spin correlations. Such corrections are relevant non-relativistic regime. In second part focused our attention on process n + ν e → p which results found previous sections could be observed.