All jobs

Postdoctoral researcher (m/f/d) in the field of quantum technology focused on laser technology and breadboarding (21-226-QUEST)

Physikalisch-Technische Bundesanstalt (QUEST / QVLS-Q1)

The Physikalisch-Technische Bundesanstalt (PTB) is the national metrology institute of the Federal Republic of Germany with scientific and technical service tasks and promotes progress and reliability in metrology for society, industry and science.
The research association “Quantum Valley Lower Saxony-Q1” (QVLS-Q1), a cooperation of Leibniz Universität Hannover, TU Braunschweig and PTB, has set itself the goal of developing a 50-qubit quantum computer based on trapped ions.
Within the framework of this project, the following position is available at PTB Braunschweig, Hanover, for a fixed term of
2 years at the earliest possible date:
Postdoctoral researcher (m/f/d) in the field of quantum technology
focused on laser technology and breadboarding
Remuneration group 13 TVöD Bund ○ Full-time ○ Limited-term
Your tasks:
Quantum control via trapped ions is one of the most advanced approaches to develop a fault-tolerant programmable quantum computer. Based on ion trap chip technology with microwave near-field control, a 50-qubit system will be built. All aspects from chip design and fabrication with integrated optics and electronics, laser and electronics development to the various software layers and applications will be covered.
Your activities in our project are:
Working in the team to develop the laser setup of the QVLS quantum computer.
Design and construction of a compact and transportable laser system for cooling and coherent manipulation of beryllium ions
Characterisation of the system and performance demonstration with an existing ion trap
Investigation and suppression of degradation on optical components such as frequency conversion crystals
Construction and characterisation of a laser wavelength stabilisation system based on a multi-wavelength transfer cavity referenced to an atomic transition for long-term stability. Application of wavelength stabilisation to beryllium and calcium ion laser systems.
Your profile:
Very good PhD in physics or comparable discipline
Good knowledge in laser technology, optics, atomic physics, quantum optics, laser cooling, or related fields
High level of commitment, ability to work independently and willingness to learn
Strong teamwork and communication skills
Openness to a diverse and international working environment
Very good knowledge of German and English (written and spoken)
Physical ability to work in the lab and conduct experiments at external sites must be available
We offer:
Research in a leading group in the field
Excellent national and international networking, besides QVLS-Q1 the group is e.g. involved in the Cluster of Excellence “QuantumFrontiers”.
World-leading research institution with excellent infrastructure
Payment in accordance with the German Federal Public Service Collective Agreement (TVöD Bund) including annual bonus and capital-forming benefits.
For further information on this position, please contact the QUEST Institute:
Prof. Dr. P. O. Schmidt, Tel.: 0531 592-4700, E-Mail: or
Dr. S. A. King, Tel.: 0531 592 4728, E-Mail: steven.king(at)

How to apply

Please use our online application form Alternatively, you can send your application by post to the following address: Physikalisch-Technische Bundesanstalt Referat "Personal" Kennziffer 21-226-QUEST Bundesallee 100 38116 Braunschweig Please understand that we do not accept applications by e-mail. Application period: 5 February 2021 to 5 March 2021.

Apply for this job

Published on February 23, 2021

Interested in this job?

Apply now