Wallenberg postdoc: Reducing stray radiation and thermalizing qubits

Our research group strives to build a quantum computer based on superconducting qubits. State of the art superconducting qubits are cooled to very low temperatures and should be in their ground state. However, all measurements show that they are excited to about 0.5% (often more). The detailed reasons for this are not understood. This subproject aims at solving the problem of overheated qubits. As a postdoc in this project you will work with very advanced technology and be part of a Swedish-Finnish collaboration, you will travel to Finland as a part of your work.

Information about the research and the division
The Wallenberg Centre for Quantum Technology (WACQT) is a 12-year, SEK 1 billion research program that started in 2018 and aims to take Swedish research and industry to the forefront of quantum technology. Our main project is to develop a high-end quantum computer based on superconducting qubits. WACQT is directed and coordinated from Chalmers University of Technology, however several Swedish universities are involved. The research areas quantum sensing and quantum communication are coordinated from Lund University and KTH Royal Institute of Technology, respectively. WACQT also has several industrial partner companies, see Industrial collaboration​.

The centre has also started the gender-balance initiative Women in WACQT (WWACQT) that aims at raising awareness on discrimination, and at supporting the career of women and gender non-conforming scientists in the WACQT community. 

Major responsibilities
Your major responsibility as postdoc is to perform microwave measurements at very low temperatures on superconducting circuits. You will do accurate population measurements of superconducting qubits, as well as design and test of cryogenic equipment that thermalizes the qubits better and avoids stray IR-radiation. This also includes testing cryo- and vacuum-compatible black materials that are black in the appropriate frequency ranges.

Qualifications
To qualify for the position of postdoc, you must have a PhD in physics or neighboring areas. Experience with cryogenics, superconducting circuits and microwave measurements is highly desirable. The position requires sound verbal and written communication skills in English. Swedish is not a requirement, but Chalmers offers Swedish courses.

Contract terms
This postdoc position is a full-time temporary employment for two years.

We offer
Chalmers offers a cultivating and inspiring working environment in the coastal city of Gothenburg. 
Read more about working at Chalmers and our benefits for employees.

Chalmers aims to actively improve our gender balance. We work broadly with equality projects, for example the GENIE Initiative on gender equality for excellence. Equality and diversity are substantial foundations in all activities at Chalmers.

Application procedure
The application should be marked with Ref 20220144 and written in English. The application should be sent electronically and be attached as pdf-files, as below:

CV: (Please name the document as: CV, Surname, Ref. number) including:
• CV, include complete list of publications
• Previous teaching and pedagogical experiences
• Two references that we can contact.

Personal letter: (Please name the document as: Personal letter, Family name, Ref. number)
1-3 pages where you:
• Introduce yourself
• Describe your previous research fields and main research results
• Describe your future goals and future research focus

Other documents:
• Attested copies of completed education, grades and other certificates.

Please use the button at the foot of the page to reach the application form. The files may be compressed (zipped).

Application deadline: May 20, 2022. 
We will start interviewing candidates during the application period.

For questions, please contact:
Professor Per Delsing, Quantum Technology Laboratory
Email: per.delsing@chalmers.se

*** Chalmers declines to consider all offers of further announcement publishing or other types of support for the recruiting process in connection with this position. *** 
   



Chalmers University of Technology conducts research and education in engineering sciences, architecture, technology-related mathematical sciences, natural and nautical sciences, working in close collaboration with industry and society. The strategy for scientific excellence focuses on our six Areas of Advance; Energy, Health Engineering, Information and Communication Technology, Materials Science, Production and Transport. The aim is to make an active contribution to a sustainable future using the basic sciences as a foundation and innovation and entrepreneurship as the central driving forces. Chalmers has around 11,000 students and 3,000 employees. New knowledge and improved technology have characterised Chalmers since its foundation in 1829, completely in accordance with the will of William Chalmers and his motto: Avancez!