项目介绍

2024年8月9日

The Quantum Technology (QT) laboratory at the department of Microtechnology and Nanoscience (MC2), Chalmers University of Technology is on a quest to deliver the milestones set by the Wallenberg Centre for Quantum Technology (WACQT). This 12-year-long research aims to promote Sweden to become a leading power in the field of quantum technology. WACQT is committed to promote career development, diversity, and gender equality through networking and supporting activities.

Information about the project
One of the main projects in WACQT is designing and building a quantum computer with the ability to solve problems beyond the capabilities of even the best conventional supercomputers. Join us if you have expertise in device fabrication and characterization techniques and want to work in a world-class cleanroom, if you are motivated to collaborate with colleagues to build quantum computers and have a career in quantum technology, in academia or at an institute or a company. For more information, visit Wallenberg Centre for Quantum Technology (WACQT) in Sweden and OpenSuperQPlus within the EU Flagship on Quantum Technology.

Major responsibilities
The reduction of quantum gate errors represents the most important problem in the development of quantum computers in any device technology. By this metric, superconducting qubits constitute a leading platform, with the best demonstrated two-qubit gate errors currently at the 0.1-0.2% level (Sung 2021, Ding 2023). Meaningful quantum computing requires that these errors be reduced to 0.01% in a scalable and reliable way across the multi-qubit chip.

These quantum gate errors are fundamentally limited by decoherence. Dielectric loss is the currently dominant decoherence mechanism in superconducting qubits (Burnett 2019). Other important contributions to decoherence originate from phonons and quasiparticles.

Here we propose a study of decoherence at the level of the physics of the constituent materials. We foresee that this effort will drastically improve our understanding of the microscopic mechanisms of decoherence and its effect on our devices, which will directly help improve the design and process development of our devices already during the project.

Recent works at Chalmers have yielded qubits with a relaxation time of over 250 µs using aluminum (Biznarova 2024). We will build on this work and our other studies on the experimental characterization and numerical modeling of superconducting resonators (Chayanun 2024, Niepce 2020). This project will complement the ongoing process and device development at Chalmers.

Y. Sung et al. (2021) Realization of high-fidelity CZ and ZZ-free iSWAP gates with a tunable coupler, Phys. Rev. X 11, 021058
L. Ding et al. (2023) High-Fidelity, Frequency-Flexible Two-Qubit Fluxonium Gates with a Transmon Coupler, Phys. Rev. X 13, 031035
J. J. Burnett et al. (2019) Decoherence benchmarking of superconducting qubits, npj Quantum Inf 5, 54
J. Biznarova et al. (2023) Mitigation of interfacial dielectric loss in aluminum-on-silicon superconducting qubits, arXiv:2310.06797
L. Chayanun et al. (2024) Characterization of process-related interfacial dielectric loss in aluminum-on-silicon by resonator microwave measurements, materials analysis, and imaging, APL Quantum 1, 026115
D. Niepce et al. (2020) Geometric scaling of two-level-system loss in superconducting resonators, Supercond. Sci. Technol. 33 025013

Qualifications

o You have a PhD in Physics, Applied Physics, Materials Science, Nanotechnology, or equivalent.
o You have expertise in device fabrication and characterization techniques.
o You have experience in the design and modeling of microwave circuits.
o Your verbal and written communication skills in English are very good.
o You are motivated for a career in quantum technology, be it in academia or at an institute or company.
o You have a collaborative attitude and an interest in working both independently and collaboratively in a team environment, sharing best practices and assuming responsibility. You are self-motivated, pay attention to detail, and possess a problem-solving analytical ability. You are willing to help supervise PhD students.

To qualify for the position of postdoc, you must hold a doctoral degree awarded no more than three years prior to the application deadline (according to the current agreement with the Swedish Agency for Government Employers). Exceptions from the 3-year limit can be made for longer periods resulting from parental leave, sick leave or military service*.

The position requires sound verbal and written communication skills in English. Swedish is not a requirement but Chalmers offers Swedish courses.

You are expected to be somewhat accustomed to teaching, and to demonstrate good potential within research and education.

* The date shown in your doctoral degree certificate is the date we use, as this is the date you have met all requirements for the doctoral degree.

Contract terms
This postdoc position is a full-time temporary employment for twoyears.
We offerChalmers 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 20240440 and written in English. The application should be sent electronically and be attached as PDF-files, as below. Maximum size for each file is 40 MB. Please note that the system does not support Zip files.

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.

Use the button at the foot of the page to reach the application form.

Please note: The applicant is responsible for ensuring that the application is complete. Incomplete applications and applications sent by email will not be considered.

Application deadline: 2024-09-30

 
For questions, please contact:
Prof. Jonas Bylander, MC2/QT,
jonas.bylander@chalmers.se

Dr. Anita Fadavi Roudsari, MC2/QT,
fadavi@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 in Gothenburg conducts research and education in technology and natural sciences at a high international level. The university has 3100 employees and 10,000 students, and offers education in engineering, science, shipping and architecture. With scientific excellence as a basis, Chalmers promotes knowledge and technical solutions for a sustainable world. Through global commitment and entrepreneurship, we foster an innovative spirit, in close collaboration with wider society.
Chalmers was founded in 1829 and has the same motto today as it did then: Avancez – forward.

URL to this page
https://www.chalmers.se/en/about-chalmers/work-with-us/vacancies/?rmpage=job&rmjob=13126&rmlang=UK