A5074597301- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- Quantum Computing Algorithms and Architecture
- Quantum Information and Cryptography
- High-Energy Particle Collisions Research
- Quantum many-body systems
- Quantum Mechanics and Applications
- Black Holes and Theoretical Physics
- Cosmology and Gravitation Theories
- Quantum and electron transport phenomena
- Quantum-Dot Cellular Automata
- Physics of Superconductivity and Magnetism
- Computability, Logic, AI Algorithms
- Theoretical and Computational Physics
- Advanced Thermodynamics and Statistical Mechanics
- Distributed and Parallel Computing Systems
- Cold Atom Physics and Bose-Einstein Condensates
- Noncommutative and Quantum Gravity Theories
- Quantum Electrodynamics and Casimir Effect
- Algebraic structures and combinatorial models
- Superconducting Materials and Applications
- Computational Physics and Python Applications
- Eating Disorders and Behaviors
- Neural Networks and Reservoir Computing
- Mathematical Inequalities and Applications
Technology Innovation Institute
2020-2024
Centre for Quantum Technologies
2014-2024
National University of Singapore
2014-2024
Universitat de Barcelona
2014-2024
Institut Català de Ciències del Clima
2024
Qilimanjaro Quantum Tech (Spain)
2021-2022
Hospital Obispo Polanco
2012-2021
Barcelona Supercomputing Center
2020
National Institute for Subatomic Physics
2019-2020
Universitat Politècnica de Catalunya
2020
Entanglement, one of the most intriguing features quantum theory and a main resource in information science, is expected to play crucial role also study phase transitions, where it responsible for appearance long-range correlations. We investigate, through microscopic calculation, scaling properties entanglement spin chain systems, both near at critical point. Our results establish precise connection between concepts information, condensed matter physics, field theory, by showing that...
We present NNPDF3.0, the first set of parton distribution functions (PDFs) determined with a methodology validated by closure test. NNPDF3.0 uses global dataset including HERA-II deep-inelastic inclusive cross-sections, combined HERA charm data, jet production from ATLAS and CMS, vector boson rapidity transverse momentum distributions ATLAS, CMS LHCb, W +c data top quark pair total cross sections CMS. Results are based on LO, NLO NNLO QCD theory also include electroweak corrections. To...
We present a new set of parton distributions, NNPDF3.1, which updates NNPDF3.0, the first global PDFs determined using methodology validated by closure test. The update is motivated recent progress in and available data, involves both. On methodological side, we now parametrize determine charm PDF alongside light-quark gluon ones, thereby increasing from seven to eight number independent PDFs. data include D0 electron muon
We prove for any pure three-quantum-bit state the existence of local bases which allow one to build a set five orthogonal product states in terms can be written unique form. This leads canonical form generalizes two-quantum-bit Schmidt decomposition. It is uniquely characterized by entanglement parameters. complete classification states. shows that right outcome an adequate measurement always erases all between other two parties.
A single qubit provides sufficient computational capabilities to construct a universal quantum classifier when assisted with classical subroutine. This fact may be surprising since only offers simple superposition of two states and single-qubit gates make rotation in the Bloch sphere. The key ingredient circumvent these limitations is allow for multiple data re-uploading. circuit can then organized as series re-uploading processing units. Furthermore, both measurements accommodate dimensions...
A microscopic calculation of ground state entanglement for the XY and Heisenberg models shows emergence universal scaling behavior at quantum phase transitions. Entanglement is thus controlled by conformal symmetry. Away from critical point, gets saturated a mass scale. Results borrowed field theory imply irreversibility loss along renormalization group trajectories. does not saturate in higher dimensions which appears to limit success density matrix technique. possible connection between...
A microscopic calculation of ground state entanglement for the XY and Heisenbergmodels shows emergence universal scaling behavior at quantum phase transitions,Entanglement is thus controlled by conformal symmetry, Away from critical point,entanglement gets saturated a mass scale, Results borrowed fieldtheory imply irreversibility loss along renormalization group trajecto-ries. Entanglement does not saturate in higher dimensions which appears to limit thesuccess density matrix technique....
We present a general strategy to simulate D+1-dimensional quantum system using D-dimensional one. analyze in detail feasible implementation of our scheme optical lattice technology. The simplest nontrivial realization fourth dimension corresponds the creation bi-volume geometry. also propose single- and many-particle experimental signatures detect effects extra dimension.
We present a new set of parton distribution functions (PDFs) based on fully global dataset and machine learning techniques: NNPDF4.0. expand the NNPDF3.1 determination with 44 datasets, mostly from LHC. derive novel methodology through hyperparameter optimisation, leading to an efficient fitting algorithm built upon stochastic gradient descent. use NNLO QCD calculations account for NLO electroweak corrections nuclear uncertainties. Theoretical improvements in PDF description include...
The power of matrix product states to describe infinite-size translational-invariant critical spin chains is investigated. At criticality, the accuracy with which they ground-state properties a system limited by size $\ensuremath{\chi}$ matrices that form approximation. This limitation quantified in terms scaling half-chain entanglement entropy. In case quantum Ising model, we find $S\ensuremath{\sim}\frac{1}{6}\text{log}\text{ }\ensuremath{\chi}$ high precision. result can be understood as...
This document is intended as a study of benchmark cross sections at the LHC (at 7 TeV) NLO using modern parton distribution functions currently available from 6 PDF fitting groups that have participated in this exercise. It also contains succinct user guide to computation PDFs, uncertainties and correlations sets. A companion note, submitted archive, provides an interim summary current recommendations PDF4LHC working group for use LHC, section uncertainty calculations.
Recently a new Bell inequality has been introduced by Collins et al. [Phys. Rev. Lett. 88, 040404 (2002)], which is strongly resistant to noise for maximally entangled states of two d-dimensional quantum systems. We prove that larger violation, or equivalently stronger resistance noise, found nonmaximally state. It shown the not good measure nonlocality and we introduce some other possible measures. The state turns out be more robust also these alternative From results it follows von Neumann...
The pixel values of an image can be casted into a real ket Hilbert space using appropriate block structured addressing. resulting state then rewritten in terms its matrix product representation such way that quantum entanglement corresponds to classical correlations between different coarse-grained textures. A truncation the MPS is tantamount compression original image. algorithm improved adding discrete Fourier transform preprocessing and further entropic lossless compression.
We study the existence of absolutely maximally entangled (AME) states in quantum mechanics and its applications to information. AME are characterized by being for all bipartitions system exhibit genuine multipartite entanglement. With such states, we present a novel parallel teleportation protocol which teleports multiple between groups senders receivers. The notable features this that (i) partition into receivers can be chosen after state has been distributed, (ii) one group perform joint...
We analyze the entanglement entropy in Lipkin-Meshkov-Glick model, which describes mutually interacting spin 1/2 embedded a magnetic field. This displays singularity at critical point that we study as function of interaction anisotropy, field, and system size. Results emerging from our analysis are surprisingly similar to those found for one- dimensional $XY$ chain.
We construct a general renormalization-group transformation on quantum states, independent of any Hamiltonian dynamics the system. illustrate this procedure for translational invariant matrix product states in one dimension and show that product, Greenberger-Horne-Zeilinger, W, domain wall are special cases an emerging classification fixed points coarse-graining transformation.