Generation and detection of nondegenerate continuous variable entanglement at telecom wavelengths

Quantum communication, computation and sensing protocols have witnessed significant advancements in recent years, driven by breakthroughs in quantum photonics.

Guided wave sources of light,particularly those in the telecom-C band(1550 nm),have emerged as promising tools for generating and measuring nondegenerate squeezed states which are crucial building blocks for various communication protocols due to their compatibility with existing telecom infrastructure, secure communication capabilities, potential for enhanced information capacity and applications in quantum networking.This proposal aims to leverage commercially available devices to build a low noise, high fidelity two mode squeezed light source.The use of waveguides offers several advantages: reduced footprint,high efficiency of entangled photon pair production in the continuous variable regime.

A novel approach using the combined principles of two mode squeezing with waveguides and balanced heterodyne detection will be employed, which has not been demonstrated before thereby breaking new scientific grounds and putting Sweden at the forefront of quantum technologies.

By building a reliable and efficient source of frequency non-degenerate squeezed light, this work will also contribute to the advancement of quantum communication, computation and sensing and could be deployed in practical applications such as quantum key distribution facilities,gravitational wave detectors and quantum biosensing experiments.