Superconducting Spiral Microresonators – From Quantum Technologies to Magnetic Spectroscopy

• Date: November 20, 2025 (Thursday)
• Time: 14:00
• Speaker: Gediminas Usevičius
• Venue: NFTMC, Auditorium D401

Quantum technologies are rapidly expanding our ability to control and observe quantum systems, but their impact reaches far beyond quantum computing or particle physics.

In this talk, we will explore how methods and ideas originating from quantum research can fundamentally transform electron spin resonance (ESR) spectroscopy – one of the oldest yet continuously evolving scientific fields.

By using spiral-shaped microresonators made from YBCO high-temperature superconductor, researchers have achieved an impressive three orders of magnitude improvement in spin-number sensitivity compared to conventional X-band pulsed ESR systems, all while maintaining standard equipment and sample handling.

These results pave the way for a new generation of spectroscopic techniques that combine the precision of quantum technologies with the robustness of classical physics.

Key Topics

• Application of superconducting microwave resonators in ESR spectroscopy

• Properties of YBCO materials and microresonator architecture

• Integration of microresonators with microfluidic systems

• New sensitivity limits and potential applications

All are welcome! This open seminar invites everyone interested in quantum technologies, superconductivity, and advances in modern spectroscopy.