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Fermionic Gaussian states: an introduction to numerical approaches

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arxiv 2111.08343 v2 pith:52HZ3IPT submitted 2021-11-16 quant-ph cond-mat.othercond-mat.stat-mechphysics.comp-ph

classification quant-phcond-mat.othercond-mat.stat-mechphysics.comp-ph
keywords numericalfermionicstatesexamplesgaussianintroductionrelevanttechniques
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This document is meant to be a practical introduction to the analytical and numerical manipulation of Fermionic Gaussian systems. Starting from the basics, we move to relevant modern results and techniques, presenting numerical examples and studying relevant Hamiltonians, such as the transverse field Ising Hamiltonian, in detail. We finish introducing novel algorithms connecting Fermionic Guassian states with matrix product states techniques. All the numerical examples make use of the free Julia package F_utilities.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Towards a Comparative Framework for Compositional AI Models

    cs.CL 2025-06 conditional novelty 5.0 of 10

    A categorical framework for compositional generalisation is applied to DisCoCirc models, showing quantum circuits outperform neural networks on systematicity while neural models overfit more.

  2. Matrix Elements of Fermionic Gaussian Operators in Arbitrary Pauli Bases: A Pfaffian Formula

    quant-ph 2025-06 conditional novelty 5.0 of 10

    Every matrix element of a fermionic Gaussian operator between arbitrary Pauli product states is expressed as a single Pfaffian of a 2L by 2L kernel with explicitly tabulated sign matrices.

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