Informationally symmetrical Bell state preparation and measurement
Abstract
Bell state measurement (BSM) plays crucial roles in photonic quantum information processing. The standard linear optical BSM is based on Hong-Ou-Mandel interference where two photons meet and interfere at a beamsplitter (BS). However, a generalized two-photon interference is not based on photon-photon interaction, but interference between two-photon probability amplitudes. Therefore, it might be possible to implement BSM without interfering photons at a BS. Here, we investigate a linear optical BSM scheme which does not require two photon overlapping at a BS. By unleashing the two photon coexistence condition, it can be symmetrically divided into two parties. The symmetrically dividable property suggests informationally symmetrical BSM between remote parties without a third party. We also present that our BSM scheme can be used for Bell state preparation between remote parties without a third party. Since our BSM scheme can be easily extended to multiple photons, it can be useful for various quantum communication applications.
Keywords
Cite
@article{arxiv.1805.11286,
title = {Informationally symmetrical Bell state preparation and measurement},
author = {Yong-Su Kim and Tanumoy Pramanik and Young-Wook Cho and Ming Yang and Sang-Wook Han and Sang-Yun Lee and Sung Moon},
journal= {arXiv preprint arXiv:1805.11286},
year = {2018}
}