Quantum Simulation of Field Theories Without State Preparation
High Energy Physics - Lattice
2020-01-31 v1 Quantum Physics
Abstract
We propose an algorithm for computing real-time observables using a quantum processor while avoiding the need to prepare the full quantum state. This reduction in quantum resources is achieved by classically sampling configurations in imaginary-time using standard lattice field theory. These configurations can then be passed to quantum processor for time-evolution. This method encounters a signal-to-noise problem which we characterize, and we demonstrate the application of standard lattice QCD methods to mitigate it.
Cite
@article{arxiv.2001.11490,
title = {Quantum Simulation of Field Theories Without State Preparation},
author = {Siddhartha Harmalkar and Henry Lamm and Scott Lawrence},
journal= {arXiv preprint arXiv:2001.11490},
year = {2020}
}
Comments
6 pages, 3 figures, 1 table, 1 appendix