Generation of a frequency-degenerate four-photon entangled state using a silicon nanowire
Date
2019
Journal Title
Journal ISSN
Volume Title
Publisher
Nature Research
Abstract
Integrated photonics is becoming an ideal platform for generating two-photon entangled states with high brightness, high stability, and scalability. This high brightness and high quality of photon pair sources encourages researchers further to study and manipulate multiphoton entangled states. Here, we experimentally demonstrate frequency-degenerate four-photon entangled state generation based on a single silicon nanowire 1 cm in length. The polarization encoded entangled states are generated with the help of a Sagnac loop using additional optical elements. The states are analyzed using quantum interference and state tomography techniques. As an example, we show that the generated quantum states can be used to achieve phase super-resolution. Our work provides a method for preparing indistinguishable multi-photon entangled states and realizing quantum algorithms in a compact on-chip setting.
Description
CITATION: Feng, L. T., et al. 2019. Generation of a frequency-degenerate four-photon entangled state using a silicon nanowire. npj Quantum Information, 5:90, doi:10.1038/s41534-019-0205-4.
The original publication is available at https://www.nature.com
The original publication is available at https://www.nature.com
Keywords
Two-photon absorbing materials, Photonics, Quantum entanglement, Multiphoton processes
Citation
Feng, L. T., et al. 2019. Generation of a frequency-degenerate four-photon entangled state using a silicon nanowire. npj Quantum Information, 5:90, doi:10.1038/s41534-019-0205-4