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Development of microwave and W-band superconducting Josephson Travelling Wave...

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You are warmly invited to attend the next seminar of the QST Seminar Series 2024/2025 in Naples.

Speaker: Javier Navarro Montilla, National Quantum Computing Centre (NQCC) , UK

Title: "Development of microwave and W-band superconducting Josephson Travelling Wave Parametric Amplifiers for quantum computing and beyond"

Time/Location: Thursday, Feb 27, 2025 at 15:00 in Aula Caianiello - Department of Physics - Federico II

Online: Online participation via MS Teams link. IMPORTANT: In case your access is denied, log out from your institutional account and open MS Teams in your web browser.

 

Abstract

Quantum-limited amplifiers are crucial for the readout of weak signals in applications such as quantum computing and fundamental physics. Josephson Travelling Wave Parametric Amplifiers (JTWPAs) have emerged as a promising quantum-limited amplification technology for the readout of superconducting qubit arrays, significantly improving readout fidelity across several gigahertz of bandwidth.

In this seminar, I will delve into the research conducted during my PhD with the Superconducting Quantum Detectors (SQD) group at the University of Oxford. This work focused on the design, fabrication, and characterisation of JTWPAs. I will also discuss our efforts to push the operational frequency range of JTWPAs to the W-band (75–110 GHz). This range aligns with emerging superconducting qubit architectures that operate at 4 K temperatures, alleviating the cryogenic bottleneck and paving the way for scalable quantum computing.
Finally, I will conclude with an update on the scientific work currently developed at the Superconducting Circuits group from the National Quantum Computing Centre (NQCC) in the United Kingdom, which I have recently joined following my PhD. 
 

 

Short Bio: Javier was a PhD student at the Superconducting Quantum Detectors (SQD) group, led by Dr. Boon-Kok Tan, from the University of Oxford. After completing his PhD in December 2024, he has recently joined the National Quantum Computing Centre (NQCC) in the United Kingdom as a Superconducting Qubit Physicist. 

 

The QST Seminars Group

Data: 27/02/2025