A Non-Degenerate Entangled Photon Source for Memory-Based Quantum Repeater Protocols

Our group specializes in the design of optical fibers that can generate entangled pairs of photons when exposed to certain colours of light. As a consequence of this “entanglement”, these photons possess unique correlations that can be exploited for both quantum communications and computation.

The proposed project is concerned with the design of a fiber-based entangled photon source that serves as an interface between quantum memory devices and optical telecommunications networks. Quantum memory devices are essential for the design of repeaters that can be used for the transmission of quantum information over large distances, yet they are incompatible with wavelengths of light frequently used in fiber optic networks. Our source shall combat this problem by emitting two entangled photons: one compatible with quantum memory devices, the other that resides in the telecom band. In doing so, one could entangle the state of a quantum memory with a photon in the telecom band, and thus, facilitate the distribution of entangled states over longer distances of fiber.

Faculty Supervisor:

Li Qian

Student:

Partner:

University of Southampton

Discipline:

Engineering

Sector:

Education

University:

University of Toronto

Program: