45_aqs
A small, highly accurate quantum processor for intermediate-depth quantum simulations
N. K. Lysne1, K. W. Kuper1, P. M. Poggi2, I. H. Deutsch2, and P. S. Jessen1
1. Center for Quantum Information and Control, Wyant College of Optical Sciences,
University of Arizona, Tucson, Arizona 85721, USA
2. Center for Quantum Information and Control, Department of Physics and Astronomy,
University of New Mexico, Albuquerque, New Mexico 87131, USA
Analog quantum simulation is widely considered a step on the path to fault tolerant quantum computation. With current noisy hardware, the accuracy of an analog simulator will degrade after just a few time steps, especially when simulating complex systems likely to exhibit quantum chaos. Here we describe a quantum simulator based on the combined electron-nuclear spins of individual Cs atoms, and its use to run high fidelity simulations of three different model Hamiltonians for >100 time steps. While not scalable to exponentially large Hilbert spaces, it provides the accuracy and programmability required to explore the interplay between dynamics, imperfections, and accuracy in quantum simulation.