Two Flavors of Staggered Fermions with Smeared Links

TL;DR

This paper extends a method for simulating four flavors of smeared link staggered fermions to two flavors, using polynomial approximation to evaluate the square root of the fermionic determinant, and tests it on finite temperature phase structure.

Contribution

The paper introduces a novel approach to simulate two flavors of staggered fermions with smeared links by approximating the square root of the four flavor determinant, enabling more efficient computations.

Findings

The two flavor action can be accurately evaluated using polynomial approximation.

The method is tested on finite temperature phase structure with HYP smeared links.

Results demonstrate the effectiveness of the approach in lattice QCD simulations.

Abstract

Staggered fermions with smeared links can have greatly improved chiral properties. In a recent paper we introduced a simple and effective method to simulate four flavors of staggered smeared link fermions. In this work we extend the four flavor method to two flavors. We define the two flavor action by the square root of the four flavor fermionic determinant and show that by using a polynomial approximation the two flavor action can be evaluated with the necessary accuracy. We test this method by studying the finite temperature phase structure with hypercubic smeared (HYP) link staggered action on N_t=4 temporal lattices.