One of the leading approaches to large-scale quantum information processing (QIP) is the continuous-variable (CV) scheme based on time multiplexing (TM). As a fundamental building block for this approach, quantum light sources to sequentially produce time-multiplexed squeezed-light pulses are required; however, conventional CV TM experiments have used fixed light sources that can only output the squeezed pulses with the same squeezing levels and phases. We here demonstrate a programmable time-multiplexed squeezed light source that can generate sequential squeezed pulses with various squeezing levels and phases at a time interval below 100 ns. The generation pattern can be arbitrarily chosen by software without changing its hardware configuration. This is enabled by using a waveguide optical parametric amplifier and modulating its continuous pump light. Our light source will implement various large-scale CV QIP tasks.
@article{arxiv.2209.09458,
title = {Programmable time-multiplexed squeezed light source},
author = {Hiroko Tomoda and Takato Yoshida and Takahiro Kashiwazaki and Takeshi Umeki and Yutaro Enomoto and Shuntaro Takeda},
journal= {arXiv preprint arXiv:2209.09458},
year = {2023}
}