Optical Phase Measurement Using a Deterministic Source of Entangled Multi-photon States
Abstract
Precision measurements of optical phases have many applications in science and technology. Entangled multi-photon states have been suggested for performing such measurements with precision that significantly surpasses the shot-noise limit. Until recently, such states have been generated mainly using spontaneous parametric down-conversion -- a process which is intrinsically probabilistic, counteracting the advantages that the entangled photon states might have. Here, we use a semiconductor quantum dot to generate entangled multi-photon states in a deterministic manner, using periodic timed excitation of a confined spin. This way we entangle photons one-by-one at a rate which exceeds 300 MHz. We use the resulting multi-photon state to demonstrate super-resolved optical phase measurement. Our results open up a scalable way for realizing genuine quantum enhanced super-sensitive measurements in the near future.
Cite
@article{arxiv.2002.08715,
title = {Optical Phase Measurement Using a Deterministic Source of Entangled Multi-photon States},
author = {Giora Peniakov and Zu-En Su and Ayal Beck and Dan Cogan and Or Amar and David Gershoni},
journal= {arXiv preprint arXiv:2002.08715},
year = {2020}
}
Comments
8 pages, 5 figures