Nonlinear feedforward enabling quantum computation
Abstract
Measurement-based quantum computation with optical time-domain multiplexing is a promising method to realize a quantum computer from the viewpoint of scalability. Fault tolerance and universality are also realizable by preparing appropriate resource quantum states and electro-optical feedforward that is altered based on measurement results. While a linear feedforward has been realized and become a common experimental technique, nonlinear feedforward was unrealized until now. In this paper, we demonstrate that a fast and flexible nonlinear feedforward realizes the essential measurement required for fault-tolerant and universal quantum computation. Using non-Gaussian ancillary states we observed 10 reduction of the measurement excess noise relative to classical vacuum ancilla.
Cite
@article{arxiv.2210.17120,
title = {Nonlinear feedforward enabling quantum computation},
author = {Atsushi Sakaguchi and Shunya Konno and Fumiya Hanamura and Warit Asavanant and Kan Takase and Hisashi Ogawa and Petr Marek and Radim Filip and Jun-ichi Yoshikawa and Elanor Huntington and Hidehiro Yonezawa and Akira Furusawa},
journal= {arXiv preprint arXiv:2210.17120},
year = {2023}
}
Comments
35 pages, 11 figures