A new dual representation for staggered lattice QCD

Abstract

We propose a new strategy to evaluate the partition function of lattice QCD with Wilson gauge action coupled to staggered fermions, based on a strong coupling expansion in the inverse bare gauge coupling $\beta =2N/g^2$. Our method makes use of the recently developed formalism to evaluate the $\mathrm{SU}(N)$ $1-$link integrals and consists in an exact rewriting of the partition function in terms of a set of additional dual degrees of freedom which we call "Decoupling Operator Indices" (DOI). The method is not limited to any particular number of dimensions or gauge group $\mathrm{U}(N)$, $\mathrm{SU}(N)$. In terms of the DOI the system takes the form of a Tensor Network which can be simulated using Worm-like algorithms. Higher order $\beta$-corrections to strong coupling lattice QCD can be, in principle, systematically evaluated, helping to answer the question whether the finite density sign problem remains mild when plaquette contributions are included. Issues related to the complexity of the description and strategies for the stochastic evaluation of the partition function are discussed.

20 pages, 9 figures

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Cited by in corpus (8)

• Constraining the QCD phase diagram at finite temperature and density
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• Dual formulations of Polyakov loop lattice models
• Dual simulation of a Polyakov loop model at finite baryon density: phase diagram and local observables
• Nuclear Liquid-Gas Transition in the Strong Coupling Regime of Lattice QCD
• Duals of lattice Abelian models with static determinant at finite density
• On the $\beta$- and quark mass dependence of the nuclear transition in the strong coupling regime
• QCD at high temperature and density: selected highlights