Postdoc in Advanced Protocols for Continuous-Variable Quantum Key Distribution

Continuous-variable quantum key distribution (QKD) is a well established technology to distribute secret keys between two parties for data encryption. The technology has strong similarities to coherent optical telecommunication, however noise is crucial as it is attributed to an eavesdropper and, thus, drastically reduces performance. Within this position you will experimentally investigate advanced protocols making use of the semi-device-independent paradigm such as measurement-device-independence and one-sided-device independence. You will use coherent and also squeezed states for the demonstrations and work together with partners from the EU Quantum Technology Flagship projects Uniqorn and CiViQ.

The position will be hosted by the Section of Quantum Physics and Information Technology (QPIT) at the Department of Physics of the Technical University of Denmark (DTU).

QPIT conducts widely recognized research within a range of diverse topics such as continuous-variable quantum information processing, quantum enhanced sensing, and engineering of solid state quantum systems. We are part of the EU Flagship project Continuous Variable Quantum Communication (CiViQ), the Photonic Integration project UNIQORN and the EU H2020 Quantum Key Distribution Testbed project OPENQKD.

Responsibilities and tasks
We are looking for a highly motivated candidate who will be in charge of experimental demonstrations of advanced continuous-variable quantum key distribution. You will

    • experimentally demonstrate measurement-device-independent CV QKD over long distances based on coherent states using fiber optics and I/Q modulation
    • experimentally work on an one-sided device independent QKD protocol based on coherent states using fiber optics and I/Q modulation
    • demonstrate CV QKD with squeezed light from a chip integrated source across DTU’s campus together with experts on squeezed light

Qualifications
Candidates should have a PhD degree or equivalent.

You have a passion for photonics and are familiar with I/Q (amplitude / phase) modulation be it from a background in telecommunications or quantum optics with continuous variables and you are intrigued by its application in quantum key distribution. You enjoy finding clever solutions to difficult problems and further you have the following qualifications:

    • Experience with working with amplitude and phase modulation and (coherent) detection: telecommunication or quantum optics
    • Experience with fiber optics
    • Some experience with python or matlab programming

Experience with squeezed light is not required and can be obtained on the job.

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 2 years.

You can read more about career paths at DTU here.

Further information
Further information may be obtained from Tobias Gehring, tobias.gehring@fysik.dtu.dk or Ulrik Andersen, ulrik.andersen@fysik.dtu.dk.

You can read more about DTU Physics at www.fysik.dtu.dk/english.

Application procedure
Please submit your online application no later than 17 September 2020 (local time).

Apply online at www.career.dtu.dk.

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
    • Diploma (MSc/PhD)
    • List of publications

Applications and enclosures 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.

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