Programmable entangled qubit states on a linear-optical platform
Abstract
We present an experimental platform for linear-optical quantum information processing. Our setup utilizes multiphoton generation using a high-quality single-photon source, which is demultiplexed across multiple spatial channels, a custom-designed, programmable, low-loss photonic chip, and paired with high-efficiency single-photon detectors. We demonstrate the platform's capability in producing heralded arbitrary two-qubit dual-rail encoded states, a crucial building block for large-scale photonic quantum computers. The programmable chip was fully characterized through a calibration process that allowed us to create a numerical model accounting for fabrication imperfections and measurement errors. As a result, using on-chip quantum state tomography (QST), we achieved high-fidelity quantum state preparation, with a fidelity of 98.5\% specifically for the Bell state.
Cite
@article{arxiv.2410.15697,
title = {Programmable entangled qubit states on a linear-optical platform},
author = {N. N. Skryabin and Yu. A. Biriukov and M. A. Dryazgov and S. A. Fldzhyan and S. A. Zhuravitskii and A. S. Argenchiev and I. V. Kondratyev and L. A. Tsoma and K. I. Okhlopkov and I. M. Gruzinov and K. V. Taratorin and M. Yu. Saygin and I. V. Dyakonov and M. V. Rakhlin and A. I. Galimov and G. V. Klimko and S. V. Sorokin and I. V. Sedova and M. M. Kulagina and Yu. M. Zadiranov and A. A. Toropov and S. A. Evlashin and A. A. Korneev and S. P. Kulik and S. S. Straupe},
journal= {arXiv preprint arXiv:2410.15697},
year = {2024}
}
Comments
11 pages, 11 figures