Postdoc position on Fiber-based High-Dimensional Quantum Key Distribution

Secure communication and data privacy is of paramount importance in the information age. With quantum computers being on the verge of maturity, a great threat to the secrecy of data and communication has emerged as the computational power increases exponentially. Quantum key distribution (QKD) is a method to securely share “keys” used in e.g. the one-time pad encryption protocol, which is proven to be unconditionally secure against any form of attack.  The first QKD systems have been realized and some even commercialized. However, challenges such as the information rates and compatibility with existing communication systems still need addressing, and new concepts must be developed to ensure better scalability of implemented schemes.

This postdoc project will investigate new and efficient quantum key distribution protocols exploring high-dimensional fiber-based encoding schemes. In addition, this project will aim at co-propagation of classical and quantum light within the same optical link and applications of such systems in a field-trial link. 

The Postdoc project will be carried out in the High-Speed Optical Communications group (HSOC) at the Technical University of Denmark (DTU Fotonik). The HSOC group is at the very forefront of international research in high-dimensional quantum communications technology and holds a number of world records within silicon photonics and ultra-high speed optical communication. The group is at a high international level, encourages collaborative work, and offers an informal working environment. The project will have access to on-site and state-of-the-art experimental facilities.

Responsibilities and qualifications
This Postdoc position will target experimental and theoretical investigations of the topics below:

• Development of a real-time high-dimensional quantum key distribution system based on high-dimensional encoding at telecom wavelengths.
• Co-propagation of classical and quantum light within the same optical fiber.
• Field trial tests of QKD systems.

The exact research activities will be continuously adapted to ensure high relevance and impact.

As a formal qualification, you must hold a PhD degree (or equivalent).

The successful candidate is expected to have experience and expertise in one or more of the following subjects:   

• Experience in fibre-based quantum key distribution.
• Experimental and theoretical knowledge of quantum communication
• Experience with high-speed electronics and FPGA coding
• Experience with classical optical communication systems
• Experience in high-dimensional fibre-based quantum communication
• Self-motivation in scientific research.
• Good communication skills in English, both written and spoken.

We offer
DTU is a leading technical university globally recognized for the excellence of its research, education, innovation and scientific advice. We offer a rewarding and challenging job in an international environment. We strive for academic excellence in an environment characterized by collegial respect and academic freedom tempered by responsibility.

Salary and terms of employment
The appointment will be based on the collective agreement with the Danish Confederation of Professional Associations. The allowance will be agreed upon with the relevant union. The period of employment is 21 months. 

The place of work is DTU Fotonik, Ørsteds Plads, Building 340, DK-2800 Kongens Lyngby, Denmark.

You can read more about career paths at DTU here . 

Further information
Further information may be obtained from Professor Leif Katsuo Oxenløwe, Email: [email protected] .

You can read more about DTU Fotonik on www.fotonik.dtu.dk/english .

If you are applying from abroad, you may find useful information on working in Denmark and at DTU at DTU – Moving to Denmark . 

Application procedure
Your complete online application must be submitted no later than 4 January 2022 (Danish time). Applications must be submitted as one PDF file containing all materials to be given consideration. To apply, please open the link "Apply online", fill out the online application form, and attach all your materials in English in one PDF file. The file must include:

• Application (cover letter)
• CV
• Academic Diplomas (MSc/PhD)
• List of publications

Applications received after the deadline will not be considered.

All interested candidates irrespective of age, gender, disability, race, religion or ethnic background are encouraged to apply.

DTU Fotonik has 220 employees with competences in optics and is one of the largest centers in the world based solely on research in photonics. Research is performed within communication technology, ultra-high speed optical transmission systems, optical sensors, lasers, LEDs, photovoltaics, bio-photonics, nano-optics and quantum communication and photonics. 

Technology for people
DTU develops technology for people. With our international elite research and study programmes, we are helping to create a better world and to solve the global challenges formulated in the UN’s 17 Sustainable Development Goals. Hans Christian Ørsted founded DTU in 1829 with a clear vision to develop and create value using science and engineering to benefit society. That vision lives on today. DTU has 12,900 students and 6,000 employees. We work in an international atmosphere and have an inclusive, evolving, and informal working environment. DTU has campuses in all parts of Denmark and in Greenland, and we collaborate with the best universities around the world.