The THEORIE team has recently published a significant theoretical study in Nature Communications on the topic of quantum critical phenomena.

This research addresses a current debate that questions the traditional understanding of dissipative quantum phase transitions in Josephson junctions connected to resistive environments with impedances Z around the resistance quantum. Our study revisits this issue by examining a junction linked to a multimode transmission line. Using exact diagonalization, we demonstrate the emergence of the transition as the system size increases. Additionally, our findings provide illuminating insights into the universal spectrum at the critical point..


Emergent quantum phase transition of a Josephson junction coupled to a high-impedance multimode resonator

Luca Giacomelli & Cristiano Ciuti

Nature Communications 15, 5455 (2024)


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QFLM 2022 School at Varenna, Italy

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The International School "Quantum Fluids of Light and Matter (QFLM2022)" in Varenna was a great success with many distinguished lecturers and a great audience of students, postdocs and senior researchers.QFLM 2022 was co-organized by Cristiano Ciuti with Alberto...