We show that a modulated longitudinal cavity-qubit coupling can be used to control the path taken by a multiphoton coherent-state wavepacket conditioned on the state of a qubit, resulting in a qubit-which-path (QWP) entangled state. QWP states can generate long-range multipartite entanglement using strategies for interfacing discrete- and continuous-variable degrees-of-freedom. Using the approach presented here, entanglement can be distributed in a quantum network without the need for single-photon sources or detectors.
@article{arxiv.2306.13573,
title = {A photonic which-path entangler based on longitudinal cavity-qubit coupling},
author = {Z. M. McIntyre and W. A. Coish},
journal= {arXiv preprint arXiv:2306.13573},
year = {2024}
}
Comments
Version accepted for publication (significant revisions)