@inproceedings{72083d0646ae4ef8a87cd81d8bef8bd2,
title = "Portable and integrated entanglement sources for quantum communication",
abstract = "We present integrated sources of polarization entanglement built on portable platforms for quantum communication. We employ type-II degenerate spontaneous parametric down conversion processes in periodically poled potassium titanyl phosphate (PPKTP) waveguides to generate pairs of orthogonally polarized photons at near-infrared wavelengths. We use balanced non-polarizing beam splitter (NPBS) to generate post-selected polarization-entangled states via coincidence measurements and investigate the power and spectral tunability of the system. The small size of the waveguides allows the installation of several units on the same platform, and thereby the generation of multiple entangled states simultaneously. We built a separate platform containing a computer-controlled tomography system to characterize the produced states and another NPBS is installed to combine photons from adjacent waveguides and assess their interferability, a prerequisite to entanglement swapping. The overall experiment is compact and requires little alignment when set, making it an attractive option for local quantum networking using mobile platforms, e.g., drones or satellites.",
keywords = "Quantum information, entanglement swapping, nonlinear optics, quantum optics",
author = "Tiphaine Kouadou and Kwiat, {Paul G.}",
note = "Publisher Copyright: {\textcopyright} 2023 SPIE. All rights reserved.; Quantum Communications and Quantum Imaging XXI 2023 ; Conference date: 21-08-2023 Through 22-08-2023",
year = "2023",
doi = "10.1117/12.2676399",
language = "English (US)",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "SPIE",
editor = "Deacon, {Keith S.} and Meyers, {Ronald E.}",
booktitle = "Quantum Communications and Quantum Imaging XXI",
}