Lattice Renormalization of Quantum Simulations
arXiv:2107.01166 · doi:10.1103/PhysRevD.104.094519
Abstract
With advances in quantum computing, new opportunities arise to tackle challenging calculations in quantum field theory. We show that trotterized time-evolution operators can be related by analytic continuation to the Euclidean transfer matrix on an anisotropic lattice. In turn, trotterization entails renormalization of the temporal and spatial lattice spacings. Based on the tools of Euclidean lattice field theory, we propose two schemes to determine Minkowski lattice spacings, using Euclidean data and thereby overcoming the demands on quantum resources for scale setting. In addition, we advocate using a fixed-anisotropy approach to the continuum to reduce both circuit depth and number of independent simulations. We demonstrate these methods with Qiskit noiseless simulators for a D discrete non-Abelian gauge theory with two spatial plaquettes.
arXiv comment22 pages, 10 figures; references added, typos corrected
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