Multiplexed entangled photon sources for all fiber quantum networks

TL;DR

This paper presents multiplexed fiber-based entangled photon sources operating at room temperature, demonstrating high-quality entanglement and multi-user capacity, advancing the development of all fiber quantum networks.

Contribution

It introduces multiplexed polarization and time-bin entangled photon sources using dispersion shifted fiber, a significant step toward scalable all fiber quantum networks.

Findings

High-quality entanglement characterized by interference, Bell inequality, and tomography.

Simultaneous multichannel entanglement in 100GHz DWDM channels.

Demonstrates capacity for multi-user entanglement distribution.

Abstract

The ultimate goal of quantum information science is to build a global quantum network, which enables quantum resources to be distributed and shared between remote parties. Such quantum network can be realized by all fiber elements, which takes advantage of low transmission loss,low cost, scalable and mutual fiber communication techniques such as dense wavelength division multiplexing. Therefore high quality entangled photon sources based on fibers are on demanding for building up such kind of quantum network. Here we report multiplexed polarization and timebin entanglement photon sources based on dispersion shifted fiber operating at room temperature. High qualities of entanglement are characterized by using interference, Bell inequality and quantum state tomography. Simultaneous presence of entanglements in multichannel pairs of a 100GHz DWDM shows the great capacity for entanglements distribution over multi-users. Our research provides a versatile platform and moves a first step toward constructing an all fiber quantum network.