Vacuum Fluctuations Boost Superconducting Transition in NbSe2 Within Cavity
Researchers observed that placing NbSe2 inside a split-ring cavity resonator raises its superconducting critical temperature, current and magnetic field.
In a new experiment, NbSe2, a well-studied transition-metal dichalcogenide, was placed inside a split-ring cavity resonator to test the influence of vacuum fluctuations on its superconducting properties. Measurements revealed that the critical temperature of the material increased when coupled to the cavity. Additionally, the critical current and critical magnetic field exhibited dramatic enhancements close to the transition temperature.
The observations match calculations showing that hybridization between the electrons and fluctuating cavity modes reduces the energy of the superconducting state. By confirming that vacuum fluctuations can strengthen superconductivity, the study offers a novel, non-invasive tool for manipulating quantum-technology materials. The findings were reported in Nature.
Why it matters
It shows a new way to improve superconductors without altering their composition, potentially advancing quantum devices.
In this story
