Exponential speedup in measuring out-of-time-ordered correlators with a single bit of quantum information
Quantum Physics
2021-03-17 v1
Abstract
Out-of-time-ordered correlators (OTOC) are a quantifier of quantum information scrambling and quantum chaos. We propose an efficient quantum algorithm to measure OTOCs that provides an exponential speed-up over the best known classical algorithm provided the OTOC operator to be estimated admits an efficient gate decomposition. We also discuss a scheme to obtain information about the eigenvalue spectrum and the spectral density of OTOCs.
Keywords
Cite
@article{arxiv.2009.03415,
title = {Exponential speedup in measuring out-of-time-ordered correlators with a single bit of quantum information},
author = {Sreeram PG and Naga Dileep Varikuti and Vaibhav Madhok},
journal= {arXiv preprint arXiv:2009.03415},
year = {2021}
}
Comments
5 pages