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 at the Braunschweig site, initially for a limited period of 3 years and at the earliest possible date:
PhD student (m/f/d)
in the field of quantum technology with the focus on
“Superconducting photon detection”.
Remuneration group 13 TVöD Bund (85%) ○ limited term
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. This will cover all aspects from chip design and fabrication with integrated optics and electronics, laser and electronics development to the various software layers and applications. Your task is the development and characterisation of a superconducting single photon detector for photons in the UV range (approx. 3 eV), which will be integrated into the ion trap chip.
In our project you will work on:
Optical simulation of dielectric and superconducting layers.
Fabrication of wafer-based optical resonators and superconducting thin films in the clean room centre of PTB
Optical and electrical characterisation of the fabricated resonators and thin films at temperatures below the transition temperature and optimisation of their properties
Development of low-noise measurement electronics
Integration of the detector into the quantum processor (demonstrator)
Presentation and publication of the scientific results
Completed university studies (diploma/master’s degree) in physics, electrical engineering or comparable with at least a “good” degree.
In-depth knowledge in the field of quantum physics
Practical experience in the field of optics/photonics and/or thin film technology
Experience with cryogenic experiments is an advantage
Programming experience, preferably in Python and/or C++
Strong teamwork and communication skills
Experimental skills and analytical abilities
Good command of written and spoken German and English
Willingness to travel on business at home and abroad
High level of commitment, ability to work independently and willingness to learn
Physical ability to work in the lab and clean room must be a given
Intensive doctoral supervision by an interdisciplinary team at the interface of quantum optics and quantum electronics.
Excellent national and international positioning and networking; in addition to QVLS-Q1, there is, for example, participation 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.
Day care centre and canteen are located on the premises
For further information on this position, please contact Department 4.5 and Department 2.4:
Dr. S. Raupach, Tel.: 0531 592-4143, e-mail: sebastian.raupach(at)ptb.de or
Dr. M. Bieler, Tel.: 0531 592-2400, e-mail: mark.bieler(at)ptb.de.
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 21-205-4/2 Bundesallee 100 38116 Braunschweig Please understand that we do not accept applications by e-mail. Application period: 22 January 2021 to 22 February 2021.
Physikalisch-Technische Bundesanstalt (QUEST / QVLS-Q1)
38116 Braunschweig, Germany
Published on February 23, 2021