2 papers
cond-mat.supr-con2026
Quantum geometry of collective pairing fluctuations in the superfluid weight of multiband superconductors
R. N. Kalkan, M. Iskin
Beyond the frozen-pairing contribution, the superfluid weight of a multiband superconductor contains a correction from the self-consistent relaxation of the pairing amplitudes unde…
cond-mat.quant-gas2026
Pair size versus coherence length and quantum geometry in the spin-orbit coupled BCS-BEC crossover
R. N. Kalkan, M. Iskin
We investigate the interplay between pairing correlations and quantum geometry in the spin-orbit-coupled BCS-BEC crossover. Working in the helicity basis, we derive the exact pair-…