Universal quantum frequency comb measurements by spectral mode-matching
Abstract
The frequency comb of a multimode interferometer offers exceptional scalability potential for field-encoded quantum information. However, the staple field detection method, homodyne detection, cannot access quantum information in the whole comb because some spectral quadratures (and their asymmetries with respect to the LO) are out of reach. We present here the first general approach to make arbitrary, one-shot measurements of a multimode quantum optical source, something that is required for photonic quantum computing and is not possible when using homodyne detection with a pulse-shaped LO. This approach uses spectral mode-matching, which can be understood as interferometry with a memory effect. We derive a complete formalism and propose an implementation by microcavity arrays.
Cite
@article{arxiv.2405.18454,
title = {Universal quantum frequency comb measurements by spectral mode-matching},
author = {Bakhao Dioum and Virginia D'Auria and Alessandro Zavatta and Olivier Pfister and Giuseppe Patera},
journal= {arXiv preprint arXiv:2405.18454},
year = {2026}
}
Comments
16 pages, 12 figures, submitted