CONVERGENCE OF A QUANTUM LATTICE BOLTZMANN SCHEME TO THE NONLINEAR DIRAC EQUATION FOR GROSS-NEVEU MODEL IN $1+1$ DIMENSIONS

doi:10.1007/s10473-024-0611-3

Abstract

Abstract: This paper studies the strong convergence of the quantum lattice Boltzmann (QLB) scheme for the nonlinear Dirac equations for Gross-Neveu model in $1+1$ dimensions. The initial data for the scheme are assumed to be convergent in $L^2$. Then for any $T\ge 0$ the corresponding solutions for the quantum lattice Boltzmann scheme are shown to be convergent in $C([0,T];L^2(\R^1))$ to the strong solution to the nonlinear Dirac equations as the mesh sizes converge to zero. In the proof, at first a Glimm type functional is introduced to establish the stability estimates for the difference between two solutions for the corresponding quantum lattice Boltzmann scheme, which leads to the compactness of the set of the solutions for the quantum lattice Boltzmann scheme. Finally the limit of any convergent subsequence of the solutions for the quantum lattice Boltzmann scheme is shown to coincide with the strong solution to a Cauchy problem for the nonlinear Dirac equations.

Key words: lattice Boltzmann scheme, nonlinear Dirac equation, Gross-Neveu model, global strong solution, Glimm type functional

CLC Number:

35L60

Ningning LI, Jing ZHANG, Yongqian ZHANG. CONVERGENCE OF A QUANTUM LATTICE BOLTZMANN SCHEME TO THE NONLINEAR DIRAC EQUATION FOR GROSS-NEVEU MODEL IN $1+1$ DIMENSIONS[J].Acta mathematica scientia,Series B, 2024, 44(6): 2249-2273.

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