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Postdoc (m/f/d) in Quantum Technologies focussing on Ion Traps with Integrated Optics (Team 1.1)

TU Braunschweig (QVLS)

Braunschweig University of Technology, with its 18.500 students and about 3.700 employees,
is the largest University of Technology in northern Germany. We stand for a strategic and
performance-oriented thinking and acting, for relevant research, motivated teaching and a
successful transfer of knowledge and technology into industry and society. We are
consequently advocating family friendliness and equal opportunities. Our campus is located in
one of the most research-oriented regions of Europe.
The „Quantum Valley Lower Saxony“ (QVLS-Q1) research consortium, a collaboration
between TU Braunschweig, Leibniz University Hannover and PTB, aims at realizing a 50-Qubit
quantum computer based on trapped ions.
In the frame of this project, the Institute of Semiconductor Technology is looking for talents
worldwide, who want to join our team:
Postdoc (m/f/d) in Quantum Technologies
focussing on Ion Traps with Integrated Optics (Team 1.1)
The position is temporary (3 years) with a possibility of extension. The location is
Braunschweig. Remuneration will be in line with the current German collective pay agreement
up to TV-L E14, depending on personal qualification and task assignments.
The control of quantum states of trapped ions is one of the most advances approached on the
way towards error tolerant programmable quantum computers. Base on chip technology for
ion traps in combination with microwave control, a 50-Qubit-System will be build in QVLS-Q1.
Expert teams will focus on all aspects from chip design and fabrication with integrated optics
and electronics to electronic circuit design, laser technology and software design for various
We are part of an excellent research environment with access to the unique infrastructure of
the whole consortium. The team is working in an excellent national and international network
and is participating – besides QVSL-Q1 – in various other large collaborative projects, including
the Excellence Cluster „QuantumFrontiers“.
Tasks and assignments:
• Group leader of Team 1.1 “Passive optical components”
• Coordination and controlling of scientific program of the team and the activities on der
surface ion traps with integrated waveguides
• Device design, microfabrication, simulation of light delivery and light manipulation on
chips, realization of experimental setups for testing and characterization
• Coordination tasks inside the QVLS consortium.
• Test ion traps with laser spectrosopy in UHV chamber
Required profile:
• Master and PhD in physics, electrical engineering or similar expertise
• Expert knowledge in one or more of the abovementioned research areas
• Ideally expertise with trapped and laser cooled ions
• High level of personal motivation, responsibility and continous learning abilities
• Pronounced communication and team building capabilities
• Openness to work in a diverse, international working environment
• Very good knowledge of the English (and possibly german) language
• Readiness to perform research in partner labs at various locations when necessary.
For further informationen please contact:
Prof. Dr. Stefanie Kroker, E-Mail:, phone 0531 391 65350 or
Prof. Dr. Tanja Mehlstäubler, E-Mail:, phone 0531 592 4710
TU Braunschweig offers flexible part-time models whenever possible for supporting family-
friendliness. Disabled persons are preferred in case of equal suitability. Written evidence has
to be presented in the application. Applications from applicants of all nationalities are welcome.
TU Braunschweig aims to reduce under-representation in all areas and positions as defined by
the NGG. Therefore, applications from women are particularly welcome in this case.
Personal data will be stored for the purpose of carrying out the application procedure.
Application costs cannot be reimbursed. Please understand that applications that are not
considered can only be returned against a self-addressed and stamped envelope. By
submitting your application, you agree that your application may be forwarded internally to
parallel advertising procedures in the consortium.

How to apply

Are you interested? In this case we are looking forward to your application. Please send your application via email ( as a single PDF document. In case this is not possible, a written application may be sent to: Institut für Halbleitertechnik, Frau Silke Feldhusen, TU Braunschweig, Hans-Sommer-Straße 66, 38106 Braunschweig). Reference Number 20-QVLS-1.1A Application deadline: February 28 th 2021.

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Published on February 23, 2021

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