A5048190187- Cold Atom Physics and Bose-Einstein Condensates
- Quantum many-body systems
- Quantum, superfluid, helium dynamics
- Quantum and electron transport phenomena
- Quantum Information and Cryptography
- Physics of Superconductivity and Magnetism
- Opinion Dynamics and Social Influence
- Atomic and Subatomic Physics Research
- Mechanical and Optical Resonators
- Advanced Thermodynamics and Statistical Mechanics
- Quantum Computing Algorithms and Architecture
- Electronic and Structural Properties of Oxides
- Strong Light-Matter Interactions
- Neural Networks and Reservoir Computing
- Advanced Frequency and Time Standards
- Quantum optics and atomic interactions
- Spectroscopy and Laser Applications
Centre National de la Recherche Scientifique
2016-2023
Austrian Academy of Sciences
2021-2023
Université Grenoble Alpes
2019-2023
Laboratoire de Physique et Modélisation des Milieux Condensés
2019-2023
Universität Innsbruck
2021-2023
University of Bologna
2014-2018
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
2014-2018
Osservatorio astronomico di Bologna
2014-2018
Laboratoire de Physique de l'ENS de Lyon
2016
École Normale Supérieure de Lyon
2016
Simulating the properties of many-body fermionic systems is an outstanding computational challenge relevant to material science, quantum chemistry, and particle physics.-5.4pc]Please note that spelling following author names in manuscript differs from provided article metadata: D. González-Cuadra, Bluvstein, M. Kalinowski, R. Kaubruegger, N. Maskara, P. Naldesi, T. V. Zache, A. Kaufman, Lukin, H. Pichler, B. Vermersch, Jun Ye, Zoller. The has been retained; please confirm. Although...
The relaxation of uniform quantum systems with finite-range interactions after a quench is generically driven by the ballistic propagation long-lived quasiparticle excitations triggered sufficiently small quench. Here we investigate case long-range ($1/{r}^{\ensuremath{\alpha}}$) for $d$-dimensional lattice spin model uniaxial symmetry, and show that, in regime $d<\ensuremath{\alpha}<d+2$, entanglement correlation buildup radically altered existence nonlinear dispersion relation...
We study the time evolution of entanglement entropy and spectrum in a finite-size system which crosses quantum phase transition at different speeds. focus on transverse-field Ising model with time-dependent magnetic field, is linearly tuned scale $\ensuremath{\tau}$. The displays regimes depending value $\ensuremath{\tau}$, showing also oscillations depend instantaneous energy spectrum. characterized by rich dynamics where multiple crossings take place gap-dependent frequency. Moreover, we...
The many-body localization (MBL) transition is a quantum phase involving highly excited eigenstates of disordered Hamiltonian, which evolve from “extended/ergodic" (exhibiting extensive entanglement entropies and fluctuations) to “localized" area-law scaling fluctuations). MBL can be driven by the strength disorder in given spectral range, or energy density at fixed – if system possesses mobility edge. Here we propose explore latter mechanism using “quantum-quench spectroscopy", namely via...
We investigate the ground-state properties of spin-$1/2$ XXZ model with power-law-decaying ($1/{r}^{\ensuremath{\alpha}}$) interactions, which describe spins interacting long-range transverse (XX) ferromagnetic interactions and longitudinal (Z) antiferromagnetic or hard-core bosons repulsion hopping. The nature couplings allows us to quantitatively study spectral, correlation, entanglement system by making use linear spin-wave theory, supplemented density-matrix renormalization group in...
We study a gas of attracting bosons confined in ring shape potential pierced by an artificial magnetic field. Because attractive interactions, quantum analogs bright solitons are formed. As genuine quantum-many-body feature, we demonstrate that angular momentum fractionalization occurs and such effect manifests on time flight measurements. consequence, the matter-wave current our system can react to very small changes rotation or other gauge fields. worked out protocol entangle solitonic...
We provide an efficient randomized measurement protocol to estimate two- and four-point fermionic correlations in ultracold atom experiments. Our approach is based on combining random atomic beam splitter operations, which can be realized with programmable optical landscapes, high-resolution imaging systems such as quantum gas microscopes. illustrate our results the context of variational eigensolver algorithm for solving chemistry problems.
The expansion dynamics of bosonic gases in optical lattices has recently been the focus increasing attention, both experimental and theoretical. We consider, by means numerical Bethe ansatz, initially confined wave packets two interacting bosons on a lattice. show that correspondence between asymptotic velocities projection evolved function over bound states system exists, clarifying existing picture for such situations. Moreover, we investigate role lattice this kind evolution.
We analyze the effects of disorder on correlation functions one-dimensional quantum models fermions and spins with long-range interactions that decay distance $\ell$ as a power-law $1/\ell^α$. Using combination analytical numerical results, we demonstrate imply long-distance algebraic correlations within disordered-localized phases, for all exponents $α$. The exponent depends only $α$, not, e.g., strength disorder. find similar localization wave-functions. These results are in contrast to...
We study the ground state of two interacting bosonic particles confined in a ring-shaped lattice potential and subjected to synthetic magnetic flux. The system is described by Bose-Hubbard model solved exactly through plane-wave Ansatz wave function. obtain energies correlation functions both for repulsive attractive interactions. In contrast with one-dimensional continuous theory Lieb-Liniger model, case we prove that center mass coupled its relative coordinate. Distinctive features clearly...
Abstract We study a quantum many-body system of attracting bosons confined in ring-shaped potential and interrupted by weak link. With such architecture, the defines atomtronic interference devices harnessing solitonic currents. demonstrate that is characterized specific interplay between interaction strength In particular, we find that, depending on operating conditions, current can be universal function relative size impurity interaction. The low lying states are studied through quench...
We study an ultracold atomic gas with attractive interactions in a one-dimensional optical lattice. find that its excitation spectrum displays quantum soliton band, corresponding to $N$-particle bound states, and continuum band of other, mostly extended, states. For system finite size, the two branches are degenerate energy for weak interactions, while gap opens above threshold value interaction strength. interplay between extended states has important consequences both static dynamical...
Atomtronics deals with matter-wave circuits of ultra-cold atoms manipulated through magnetic or laser-generated guides different shapes and intensities. In this way, new types quantum networks can be constructed, in which coherent fluids are controlled the know-how developed atomic molecular physics community. particular, devices enhanced precision, control flexibility their operating conditions accessed. Concomitantly, simulators emulators harnessing on current flows also developed. Here,...
Simulating the properties of many-body fermionic systems is an outstanding computational challenge relevant to material science, quantum chemistry, and particle physics. Although qubit-based computers can potentially tackle this problem more efficiently than classical devices, encoding non-local statistics introduces overhead in required resources, limiting their applicability on near-term architectures. In work, we present a processor, where models are locally encoded register simulated...
In quantum mechanics, each particle is described by a complex valued wave-function characterized amplitude and phase. When many particles interact other, cooperative phenomena give rise to many-body state with specific coherence. What the interplay between single-particle's phase coherence coherence? Over years, such question has been object of profound analysis in physics. Here, we demonstrate how time-dependent interference formed releasing an interacting degenerate Fermi gas from...
Quantum mechanics is characterized by quantum coherence and entanglement. After having discovered how these fundamental concepts govern physical reality, scientists have been devoting intense efforts to harness them shape future science technology. This a highly nontrivial task because most often entanglement are difficult access. Here, we demonstrate the enhancement of sensitivity many-body system with specific properties. Our made strongly correlated attracting neutral bosons flowing in...
We discuss an interferometric scheme employing interference of bright solitons formed as specific bound states attracting bosons on a lattice. revisit the proposal Castin and Weiss [Phys. Rev. Lett. vol. 102, 010403 (2009)] for using scattering quantum matter-wave soliton barrier in order to create coherent superposition state being entirely left right barrier. In that proposal, it was assumed is perfectly elastic, i.e. center-of-mass kinetic energy lower than chemical potential soliton....
In quantum mechanics, each particle is described by a complex valued wave-function characterized amplitude and phase. When many particles interact other, cooperative phenomena give rise to many-body state with specific coherence. What the interplay between single-particle's phase coherence coherence? Over years, such question has been object of profound analysis in physics. Here, we demonstrate how time-dependent interference formed releasing an interacting degenerate Fermi gas from...
Abstract Quantum localization (single-body or many-body) comes with the emergence of local conserved quantities—whose conservation is precisely at heart absence transport through system. In case fermionic systems and S = 1/2 spin models, such quantities take form effective two-level systems, called l -bits. While their existence defining feature localized phases, direct experimental observation remains elusive. Here we show that strongly -bits bear a dramatic universal signature, accessible...
We provide a measurement protocol to estimate 2- and 4-point fermionic correlations in ultra-cold atom experiments. Our approach is based on combining random atomic beam splitter operations, which can be realized with programmable optical landscapes, high-resolution imaging systems such as quantum gas microscopes. illustrate our results the context of variational eigensolver algorithm for solving chemistry problems.