Quantum-key distribution with spatial multiplexing optical fibers

Encoding information in quantum states is the new era of communication known as quantum communication. Quantum key
distribution (QKD) is the building block of quantum communication making a distribution of a secret key between two parties. The
quantum states can be two-dimensions (qubit) or d-dimensions (qudit) quantum states defined in different degrees of freedom
(e.g., polarization, frequency, time). In this project, we generate qubits using an entangled single-photon source followed
by extension of the dimensions (d=3) via the orbital angular momentum (OAM) as a new degree of freedom generated by liquid
crystal polymer (LCP). The distribution of these quantum states should provide a more secure and robust quantum communication channel along with enabling higher information complexity.

Faculty Supervisor:

Bora Ung

Student:

Partner:

University of the Witwatersrand

Discipline:

Computer science

Sector:

Information and Communications Technology; Quantum Science

University:

École de technologie supérieure

Program: