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      The two-site Heisenberg model studied using a quantum computer: A didactic introduction Translated title: O modelo de Heisenberg de dois sítios estudado usando um computador quântico: Uma introdução didática

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          Abstract

          The two-site Heisenberg model has an extraordinarily simple analytical solution and is traditionally used as a benchmark against numerical methods, such as exact diagonalization and Monte Carlo methods. In the same spirit, we benchmark three quantum algorithms that are implemented in a quantum computer against the analytical solution of this model. In particular, this presentation includes a description of the standard and iterative quantum phase estimation algorithms, as well as the variational quantum eigensolver. These quantum algorithms are introduced in a pedagogical fashion allowing newcomers to the subject, familiar with only the most basic quantum mechanical systems, to easily reproduce the presented results and apply the methods to other problems, thus building a seemingly under-appreciated path towards useful quantum algorithms through the lens of simulating and computing properties of physical quantum systems.

          Translated abstract

          O modelo de Heisenberg de dois sítios tem uma solução analítica extraordinariamente simples e é tradicionalmente usado como um ponto de referência para métodos numéricos, como a diagonalização exata e métodos de Monte Carlo. Nessa linha de pensamento, comparamos três algoritmos quânticos implementados num computador quântico com a solução analítica deste modelo. Em particular, este trabalho inclui uma descrição dos algoritmos quânticos tradicional e iterativo para a estimação de fase, bem como o variational quantum eigensolver. Estes algoritmos quânticos são introduzidos de forma pedagógica, permitindo que leitores familiarizados apenas com os sistemas quânticos mais básicos, reproduzam facilmente os resultados apresentados e apliquem os métodos a outros problemas, construindo assim um caminho, aparentemente subestimado, para algoritmos quânticos úteis através da simulação e cálculo de propriedades de sistemas quânticos.

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          Most cited references51

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          Quantum Computation and Quantum Information

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            The Theory of Magnetism Made Simple

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              Proceedings 35th Annual Symposium on Foundations of Computer Science

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                Author and article information

                Journal
                rbef
                Revista Brasileira de Ensino de Física
                Rev. Bras. Ensino Fís.
                Sociedade Brasileira de Física (São Paulo, SP, Brazil )
                1806-1117
                1806-9126
                2024
                : 46
                : e20240129
                Affiliations
                [1] Braga orgnameUniversidade do Minho orgdiv1Departamento de Física e Centro de Física Portugal
                [2] Braga orgnameUniversidade do Minho orgdiv1Escola de Ciências orgdiv2Laboratório de Instrumentação e Física Experimental de Partículas Portugal
                [3] Espoo orgnameAalto University orgdiv1Department of Applied Physics Finland
                [4] Braga orgnameInternational Iberian Nanotechnology Laboratory Portugal
                [5] Odense M orgnameUniversity of Southern Denmark orgdiv1POLIMA–Center for Polariton-driven Light–Matter Interactions Denmark
                [6] Odense M orgnameUniversity of Southern Denmark orgdiv1Danish Institute for Advanced Study Denmark
                Author information
                https://orcid.org/0000-0002-3450-4923
                Article
                S1806-11172024000100471 S1806-1117(24)04600000471
                10.1590/1806-9126-rbef-2024-0129
                ce801f04-017a-4466-acd1-28eec3849d76

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 16 April 2024
                : 21 August 2024
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 51, Pages: 0
                Product

                SciELO Brazil


                Algoritmos quânticos,Estimativa de fase,Variational quantum eigensolver,Heisenberg Model,Quantum algorithms,Phase estimation,Modelo de Heisenberg

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