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Efficient Basis Formulation for ( 1 + 1 )-Dimensional SU(2) Lattice Gauge Theory: Spectral Calculations with Matrix Product States

机译:用于(1 + 1) - 二维SU(2)格仪理论的有效基础制剂:矩阵产品状态的光谱计算

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We propose an explicit formulation of the physical subspace for a ( 1 + 1 )-dimensional SU(2) lattice gauge theory, where the gauge degrees of freedom are integrated out. Our formulation is completely general, and might be potentially suited for the design of future quantum simulators. Additionally, it allows for addressing the theory numerically with matrix product states. We apply this technique to explore the spectral properties of the model and the effect of truncating the gauge degrees of freedom to a small finite dimension. In particular, we determine the scaling exponents for the vector mass. Furthermore, we also compute the entanglement entropy in the ground state and study its scaling towards the continuum limit.
机译:我们提出了一个(1 + 1) - 二维SU(2)格式仪表理论的物理子空间的明确制定,其中规格自由度被整合出来。我们的配方完全是一般的,可能适用于未来量子模拟器的设计。另外,它允许以矩阵产品状态数值方式解决理论。我们应用该技术来探索模型的光谱特性和截断规格自由度到小有限维度的效果。特别是,我们确定矢量质量的缩放指数。此外,我们还计算地面状态的纠缠熵,并研究其朝向连续局的缩放。

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