The TruePA project (Truly Resilient Quantum Limited Traveling Wave Parametric Amplifiers) is a European research project funded by the Horizon Europe program and brings together researchers from 5 different countries. TruePA will develop the next generation of Traveling Wave Parametric Amplifiers (TWPAs), which are key tools for quantum technologies and basic sciences involving the detection of weak electromagnetic signals in the microwave domain.

As a consortium we want to gain a better understanding of the market needs regarding TWPAs, so that our research objectives can meet the actual requirements and needs of the community. We would kindly ask you to fill in our TWPA market survey. Completing the survey will take about 5 minutes and will help us to understand which expectations the component must need in the future.

The survey is open until 31.07.2023. After evaluation, we will publish the results of the survey here.

Researchers from the TruePA project recently gathered in Villard-de-Lans in the french Préalpes for the productive TruePA Days. The three-day meeting featured presentations from all partners and a poster session. Between the official sessions the organizers had set aside time for informal discussions between the ~40 scientists attending the event. The event served as a valuable platform to further collaboration, knowledge exchange, and connections within the consortium.

During the TruePA Days the partners showcased their latest advancements towards truly resilient, quantum-limited, and non-reciprocal parametric amplifiers. Through engaging talks and a poster session, researchers shared their findings and explored innovative solutions to overcome challenges. On the final day of the event the attendees enjoyed a visit to the labs of Insitut Néel in nearby Grenoble, which was great fun for all participants and provided another chance to continue scientific exchange and brainstorming for new ideas in TruePA.

Researchers from Institut Néel, a partner in TruePA, have provided a TWPA for the search of galactic axions to an italian research consortium prior to the start of TruePA. The axion is a hypothetical particle introduced to solve the stron CP problem in particle physics. The detector for these particles, a so-called haloscope has at its core a high-Q microwave cavity, which in this particular experiment is read out at frequencies around 10.353 GHz. Since the researchers are looking for very weak signals, a TWPA is a great addition to the setup to boost the overall SNR of the detector. The authors conclude: 'This result improves a factor about 4 the sensitivity we obtained in our previous run in almost the same frequency range, thanks to the new amplifier and an improved description of the background in the data analysis, based on a robust noise mode.' Read the full pre-print on arXiv: https://arxiv.org/abs/2304.07505

The annual March Meeting of the American Physical Society is among the biggest condensed matter conferences worldwide. Numerous sessions focus on various aspects of research on superconducting quantum circuits. This year three sessions were focused on parametric amplifiers alone, indicating the growing importance of the research direction. People from six of the eight partner institutions of TruePA made the trip to Las Vegas and contributed a total of 14 talks. In addition to the in-person meeting there will be a Virtual March Meeting from 20th to 22nd March, which provides  the opportunity to get research highlights from the comfort of your home.

As the TruePA consortium, we especially recommend the following sessions. You might even spot some familiar names – Enjoy!

M72 - Kinetic Inductance Parametric Amplifiers and Quantum-Limited Detectors
Y71 - Improving Qubit Readout with Parametric Amplifiers
Z71 - Lumped-Element Parametric Amplifiers and Circulators

Over two days the TruePA consortium met for its kickoff meeting at Karlsruhe Institute of Technology. About 20 participants of the partner organizations from Austria, France, Germany, Italy, and Sweden made the trip to Karlsruhe, while the hybrid format also allowed online attendance. Three months into the project the time was right for a first in-person check-in to discuss results and strategize about next steps. Organizational questions were addressed in the management board meeting, and the groundwork to make TruePA a success was discussed. The consortium’s advisory board was represented by its two experts from industry, Dr. J. Braumüller (Infineon AG) and Dr. D. de Jong (Qblox B.V.) who gave an overview over their respective activities. Throughout the project the advisory board will provide an outside perspective to guide the activities in TruePA.

Coordinator Prof Anja Metelmann from KIT commented after the meeting: “It was great to finally meet in person and get the project started. Even though it’s only the 3rd month of the project, we could already discuss scientific results and I am excited to see what we will be able to achieve over the next years.”