PhD scholarship in Quantum Physics – DTU, Denmark 2021

    PhD scholarship in Quantum Physics - DTU, Denmark 2021

    PhD scholarship in Continuous-variable quantum key distribution (CV-QKD) with Squeezed Light, in the Section of Quantum Physics and Information Technology (QPIT), at the Department of Physics of the Technical University of Denmark (DTU)

    PhD scholarship in Continuous-Variable Quantum Key Distribution with Squeezed Light


    Mar 28, 2021 (GMT +1)


    PhD scholarship

    No. of Position(s)


    Research area

    • Photonics
    • Quantum optics


    According to standard norms


    DTU Physics

    Contract period

    3 Years


    Assoc. Prof. Tobias Gehring

    Prof. Ulrik Andersen


    You should have a two-year master’s degree (120 ECTS points) or a similar degree with an academic level equivalent to a two-year master’s degree. 


    You have a passion for photonics and you are familiar with I/Q (amplitude / phase) modulation, be it from a background in telecommunications, quantum optics with continuous variables, interferometry or similar 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 lasers, amplitude and phase modulation and (coherent) detection
    • Experience with fiber optics is a plus
    • Some experience with python or matlab programming

    How to Apply?

    • 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
    • You may apply prior to ob­tai­ning your master’s degree but cannot begin before having received it.

    Documents required

    • A letter motivating the application (cover letter)
    • Curriculum vitae
    • Grade transcripts and BSc/MSc diploma
    • Excel sheet with translation of grades to the Danish grading system (see guidelines and Excel spreadsheet here)

    Responsibilities/Job Description

    Continuous-variable quantum key distribution (CV-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 CV-QKD with squeezed light which offers performance benefits in comparison to the standard coherent states. Squeezed states are quantum states of light which exhibit lower noise than coherent states in one field quadrature.

    You will distribute squeezed and entangled states between two locations within DTU’s campus and also down-town Copenhagen. Furthermore you will demonstrate CV-QKD between those locations. The PhD project includes an external stay at an international research institution, and you will work together with partners from the EU Quantum Technology Flagship projects Uniqorn and CiViQ as well as OpenQKD.

    We are looking for a highly motivated candidate who will perform experimental demonstrations of continuous-variable quantum key distribution with squeezed light. You will 

    • experimentally distribute squeezed and entangled states across DTU’s campus and from DTU to down-town Copenhagen
    • experimentally demonstrate CV-QKD with squeezed states in the lab and in the field

    About Section of Quantum Physics and Information Technology (QPIT)

    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’s vision is to understand, engineer and control complex quantum systems of light and matter, and to exploit these systems for quantum information processing and quantum metrology. We are a large, highly international research group of students and staff with diverse backgrounds. We have a friendly and dynamic research environment with close, daily interaction among all group members and strong collaborations with many academic and industrial partners. Technical support is excellent with electronics and process engineers embedded in the section and a large capacity, skilled mechanical workshop at the Department.

    Other Benefits

    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.


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

    Other PhD Positions with Scholarships

    Post expires at 8:59am on Monday March 29th, 2021 (GMT+9)