Research in quantum communication

Quantum communication research within WACQT comprises a number of research groups that work with various aspects of quantum cryptography: quantum key distribution, entangled photon sources, increasing the transfer rate, etc. 
For a general introduction to quantum communication, please go to page Quantum communication.

Coordinators of efforts in quantum communication:
Katia Gallo,, +46 76 517 33 15
Stefan Kröll,​. +46 46 222 96 26

Research projects in quantum communication

Multipartite photon entanglement via concurrent parametric down-conversion processes in two-dimensional nonlinear lattices
The objective is to push forward the technology and study novel monolithic multi-photon sources and frequency converters coupling flying qubits at telecom wavelengths to quantum dots and quantum memories.
Principal investigator: Katia Gallo, KTH 
PhD student: Nicklas Bjärnhall Prytz, KTH

Development of an entanglement-based, device independent quantum-key distribution system 
The underlying idea is to use Bell tests to ensure that the encryption key is shared by only the legitimate receivers, even if the key generating device is made by an adversary.
Principal investigator: Mohamed Bourennane, Stockholm University
PhD student: Alban Seguinard, Stockholm University

Quantum-dot based photon sources that will be engineered for generation of highly indistinguishable and entangled photon pairs with near-unity extraction efficiency 
The project will experimentally implement a new method to speed up tomography measurements for larger number of qubits. 
Principal investigator: Ana Predojevic, Stockholm University
PhD student: Position expected to be filled by May 2020

Quantum communication based on few-mode and multi-core optical fibers 
The objective is to increase the transfer rate of quantum encryption keys by using multimodal and/or multicore optical fibres.
Principal investigator: Guilherme Xavier, Linköping University
PhD student: Alvaro Alarcon, Linköping University

Sources of polarization entangled photon pairs, based on the bulk- and surface non-linearities of semiconductor nano-waveguide structures 
The project aims at developing new sources of entangled photon pairs.
Principal investigators: Gunnar Björk and Marcin Swillo, KTH
PhD student: Albert Peralta Amores, KTH

Published: Mon 22 Jun 2020.