Postdoc in travelling wave parametric amplifiers for quantum technologies

Om jobbet

We, the 202Q-lab, are looking for a highly motivated post-doctoral researcher to develop travelling wave parametric amplifiers (TWPAs) based on the nonlinear kinetic inductance of superconducting thin films. We aim to demonstrate their integration in superconducting qubit readout systems and validate KI-TWPA technology for scalable quantum computing applications. This position is funded through the Knut and Alice Wallenberg (KAW) Proof of Concept Grants in AI, Quantum technologies or ICT. Applications submitted by April 16, 2026, will receive full consideration. Applications may be reviewed on a rolling basis until the position is filled.

About us

The Department of Microtechnology and Nanoscience advances the frontiers in quantum technology, nanoscience, photonics and future electronic systems - for technical and societal development. Our cross-disciplinary approach gives interesting collaborations in academy, industry and society, and is a driving force for innovations, results and breakthroughs. We offer a vibrant, international research environment and direct access to world-class nanofabrication facilities.

At the Quantum Technology Laboratory, we explore how quantum physics can unlock radically new ways of processing information - far beyond the limits of classical systems. Our research spans quantum computing, sensing, transduction, thermodynamics, and foundations, all aimed at harnessing the powerful behavior of light and matter at the quantum level. We offer a vibrant, international research environment and direct access to world-class nanofabrication facilities. The division is also part of the Wallenberg Centre for Quantum Technology (WACQT), a 10-year initiative launched in 2018 to advance Swedish academia and industry in quantum technology and to build a Swedish quantum computer.

In our research group, the 202Q-lab, we use superconducting circuits to explore fundamental and applied questions in the areas of quantum information processing, microwave quantum optics and communication, and quantum thermodynamics. Our research is funded by WACQT, the Swedish Research Council, the European Research Council (ERC), and the European Innovation Council (EIC).

At the 202Q-lab, we are on a mission that takes us from curiosity-driven quantum research to technological and societal impact.

About the research project

A key challenge in scaling superconducting quantum processors is the efficient readout of quantum bits. Current state-of-the-art systems rely on a chain of cryogenic amplifiers: a near-quantum-limited parametric amplifier operating at millikelvin temperatures followed by a high-electron-mobility transistor (HEMT) amplifier at the 4 K stage of a dilution refrigerator. While this approach provides high-fidelity readout, it increases complexity, cost, power dissipation, and limits scalability.

In the 202Q-lab, we have developed a prototype travelling wave parametric amplifier based on the nonlinear kinetic inductance of superconducting films (KI-TWPA). Unlike conventional Josephson-junction-based parametric amplifiers, this technology can operate efficiently at both millikelvin and 4 K temperatures while providing high gain, wide bandwidth, and excellent power handling.

Our goal is to validate and optimize the KI-TWPA design, integrate it into superconducting qubit readout setups, and demonstrate high-fidelity qubit measurement using the amplifier as the only cryogenic amplifier in the system. This would eliminate the need for the conventional HEMT stage, significantly reducing heat load and simplifying cryogenic hardware for large-scale quantum processors.

The project will involve device design and simulation, nanofabrication of superconducting circuits, microwave characterization at cryogenic temperatures, and integration with superconducting qubit experiments. Ultimately, the work aims to validate the technology and develop a minimum viable product for quantum computing applications.

Who we are looking for

You hold a PhD degree in Physics, Applied Physics, Nanotechnology, Microwave Engineering, or a related field. Ideally, you have hands-on experience in at least some of the following areas: mesoscopic physics, superconducting circuits, nanofabrication, cryogenics, microwave design, or microwave measurements.

You see yourself pursuing a career in research and development or education, either in academia or industry. You are driven by scientific curiosity and by a desire to make a difference. You can confidently read, write, and discuss science in English. Outstanding candidates with a strong track record in physics or engineering are encouraged to apply.

What you will do

The successful candidate will lead further development and experimental validation of the KI-TWPA technology. The work will be performed in collaboration with members of the 202Q-lab and partners in the WALP project.

The foreseen tasks include:

• Circuit design and simulation of superconducting microwave devices
  • Nanofabrication of superconducting thin-film circuits
  • Microwave measurements in frequency and time domain
  • Cryogenic experiments in dilution refrigerators
  • Integration of amplifiers with superconducting qubit readout systems
  • Data analysis, modelling, and dissemination of results

Contract terms

The position is a temporary full-time employment for two years with the possibility of a one-year extension.

The position requires physical presence throughout the entire employment. A valid residence permit must be presented by the start date, otherwise the offer may be withdrawn.

What we offer

• As a postdoc at Chalmers, you are an employee and enjoy all employee benefits. Read more about working at Chalmers and our benefits for employees.

• A dynamic and inspiring working environment in the coastal city of Gothenburg.

• Read more about Sweden's generous parental leave, subsidized day care, free schools, healthcare etc at Move To Gothenburg.

Chalmers is dedicated to improving gender balance and actively works with equality projects, such as the GENIE Initiative for gender equality and excellence. We celebrate diversity and consider equality and inclusion as fundamental aspects of all our activities.

If Swedish is not your native language, Chalmers offers Swedish courses to help you settle in.

Application procedure

The application should be written in English 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

• A CV, including a complete list of publications.
• Details of previous teaching and pedagogical experience.

Personal letter

• A brief introduction about yourself.
• A summary of your previous research fields and key research outcomes.
• An outline of your future goals and research focus.

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. Contact details to references will be requested after the interview.

We welcome your application no later than 2026-04-16

For questions please contact:

Simone Gasparinetti
Prof.
simoneg@chalmers.se

We look forward to your application!

*** 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.

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