Search Results for author: Maciej Lewenstein

Found 19 papers, 15 papers with code

Universal representation by Boltzmann machines with Regularised Axons

no code implementations22 Oct 2023 Przemysław R. Grzybowski, Antoni Jankiewicz, Eloy Piñol, David Cirauqui, Dorota H. Grzybowska, Paweł M. Petrykowski, Miguel Ángel García-March, Maciej Lewenstein, Gorka Muñoz-Gil, Alejandro Pozas-Kerstjens

It is widely known that Boltzmann machines are capable of representing arbitrary probability distributions over the values of their visible neurons, given enough hidden ones.

Retrieval

Preface: Characterisation of Physical Processes from Anomalous Diffusion Data

no code implementations2 Jan 2023 Carlo Manzo, Gorka Muñoz-Gil, Giovanni Volpe, Miguel Angel Garcia-March, Maciej Lewenstein, Ralf Metzler

Preface to the special issue "Characterisation of Physical Processes from Anomalous Diffusion Data" associated with the Anomalous Diffusion Challenge ( https://andi-challenge. org ) and published in Journal of Physics A: Mathematical and Theoretical.

Unsupervised learning of anomalous diffusion data

1 code implementation7 Aug 2021 Gorka Muñoz-Gil, Guillem Guigó i Corominas, Maciej Lewenstein

In this work, we explore the use of unsupervised methods in anomalous diffusion data.

Certificates of quantum many-body properties assisted by machine learning

1 code implementation5 Mar 2021 Borja Requena, Gorka Muñoz-Gil, Maciej Lewenstein, Vedran Dunjko, Jordi Tura

A number of standard methods are used to tackle such problems: variational approaches focus on parameterizing a subclass of solutions within the feasible set; in contrast, relaxation techniques have been proposed to approximate it from outside, thus complementing the variational approach by providing ultimate bounds to the global optimal solution.

Transfer Learning Quantum Physics

Unsupervised machine learning of topological phase transitions from experimental data

1 code implementation14 Jan 2021 Niklas Käming, Anna Dawid, Korbinian Kottmann, Maciej Lewenstein, Klaus Sengstock, Alexandre Dauphin, Christof Weitenberg

Recently, machine learning methods have been shown to be an alternative way of localising phase boundaries also from noisy and imperfect data and without the knowledge of the order parameter.

Anomaly Detection Quantum Gases Disordered Systems and Neural Networks Mesoscale and Nanoscale Physics Quantum Physics

Inferring Nonlinear Many-Body Bell Inequalities From Average Two-Body Correlations: Systematic Approach for Arbitrary Spin-j Ensembles

1 code implementation15 Dec 2020 Guillem Müller-Rigat, Albert Aloy, Maciej Lewenstein, Irénée Frérot

This very flexible method, whose complexity does not scale with the system size, allows us to systematically improve over all previously-known Bell's inequalities robustly violated by ensembles of quantum spin-$1/2$; and to discover novel families of Bell's inequalities, tailored to spin-squeezed states and many-body spin singlets of arbitrary spin-$j$ ensembles.

Quantum Physics Other Condensed Matter Quantum Gases Strongly Correlated Electrons

Phase Detection with Neural Networks: Interpreting the Black Box

1 code implementation9 Apr 2020 Anna Dawid, Patrick Huembeli, Michał Tomza, Maciej Lewenstein, Alexandre Dauphin

Neural networks (NNs) normally do not allow any insight into the reasoning behind their predictions.

Quantum Physics Disordered Systems and Neural Networks

The imaginary part of the high-harmonic cutoff

1 code implementation29 Feb 2020 Emilio Pisanty, Marcelo F. Ciappina, Maciej Lewenstein

High-harmonic generation - the emission of high-frequency radiation by the ionization and subsequent recombination of an atomic electron driven by a strong laser field - is widely understood using a quasiclassical trajectory formalism, derived from a saddle-point approximation, where each saddle corresponds to a complex-valued trajectory whose recombination contributes to the harmonic emission.

Quantum Physics Atomic Physics Optics

Quantum Compressed Sensing with Unsupervised Tensor-Network Machine Learning

no code implementations24 Jul 2019 Shi-Ju Ran, Zheng-Zhi Sun, Shao-Ming Fei, Gang Su, Maciej Lewenstein

To transfer a specific piece of information with $|\Psi \rangle$, our proposal is to encode such information in the separable state with the minimal distance to the measured state $|\Phi \rangle$ that is obtained by partially measuring on $|\Psi \rangle$ in a designed way.

BIG-bench Machine Learning

Machine learning method for single trajectory characterization

1 code implementation7 Mar 2019 Gorka Muñoz-Gil, Miguel Angel Garcia-March, Carlo Manzo, José D. Martín-Guerrero, Maciej Lewenstein

In this paper, we propose a machine learning method based on a random forest architecture, which is able to associate even very short trajectories to the underlying diffusion mechanism with a high accuracy.

BIG-bench Machine Learning Transfer Learning

Quantum simulation for thermodynamics of infinite-size many-body systems by O(10) sites

1 code implementation3 Oct 2018 Shi-Ju Ran, Bin Xi, Cheng Peng, Gang Su, Maciej Lewenstein

In this work we propose to simulate many-body thermodynamics of infinite-size quantum lattice models in one, two, and three dimensions, in terms of few-body models of only O(10) sites, which we coin as quantum entanglement simulators (QES's).

Strongly Correlated Electrons Computational Physics Quantum Physics

Knotting fractional-order knots with the polarization state of light

2 code implementations15 Aug 2018 Emilio Pisanty, Gerard Jiménez, Verónica Vicuña-Hernández, Antonio Picón, Alessio Celi, Juan P. Torres, Maciej Lewenstein

The fundamental polarization singularities of monochromatic light are normally associated with invariance under coordinated rotations: symmetry operations that rotate the spatial dependence of an electromagnetic field by an angle $\theta$ and its polarization by a multiple $\gamma\theta$ of that angle.

Optics

Circular dichroism in high-order harmonic generation: Heralding topological phases and transitions in Chern insulators

1 code implementation4 Jul 2018 Alexis Chacón, Dasol Kim, Wei Zhu, Shane P. Kelly, Alexandre Dauphin, Emilio Pisanty, Andrew S. Maxwell, Antonio Picón, Marcelo F. Ciappina, Dong Eon Kim, Christopher Ticknor, Avadh Saxena, Maciej Lewenstein

Topological materials are of interest to both fundamental science and advanced technologies, because topological states are robust with respect to perturbations and dissipation.

Mesoscale and Nanoscale Physics Quantum Physics

Entanglement-guided architectures of machine learning by quantum tensor network

1 code implementation24 Mar 2018 Yuhan Liu, Xiao Zhang, Maciej Lewenstein, Shi-Ju Ran

In this work, we implement simple numerical experiments, related to pattern/images classification, in which we represent the classifiers by many-qubit quantum states written in the matrix product states (MPS).

BIG-bench Machine Learning

Review of Tensor Network Contraction Approaches

1 code implementation30 Aug 2017 Shi-Ju Ran, Emanuele Tirrito, Cheng Peng, Xi Chen, Gang Su, Maciej Lewenstein

One goal is to provide a systematic introduction of TN contraction algorithms (motivations, implementations, relations, implications, etc.

Computational Physics Statistical Mechanics Strongly Correlated Electrons Applied Physics Quantum Physics

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