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Quantum computation of an interacting fermionic model
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DOI：10.1088/2058-9565/ab8f63.png)
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摘要
En 中文
Relativistic fermionic field theories constitute the fundamental description of all observable matter. The simplest of the models provide a useful, classically verifiable benchmark for noisy intermediate scale quantum computers. We calculate the energy levels of a model of Dirac fermions with four-fermion interactions, on a lattice in 1 + 1 space-time dimensions. We employ a hybrid classical-quantum computation scheme to obtain the mass gap in this model for three spatial sites. With error mitigation the results are in good agreement with exact classical calculations. Our calculations extend to the vicinity of the massless limit where chiral symmetry emerges, however relative errors for quantum computations in this regime are significant. We compare our results with an analytical calculation using perturbation theory.
Keyword:
fermionic field theory
quantum computation
quantum simulation
variational algorithms
interacting fermions
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PHYSICAL REVIEW XOAAI
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