2 papers
cond-mat.stat-mech2026
Exactly Solvable RD Model: RG Cycles Meet Fractality
Ilya Liubimov, Alexander Gorsky
We consider the Bethe ansatz integrable Russian Doll (RD) model of superconductivity with time-reversal symmetry breaking, which exhibits a cyclic renormalization group. By obtaini…
hep-th2026
Theta-term in Russian Doll Model: phase structure, quantum metric and BPS multifractality
Alexander Gorsky, Ilya Liubimov
We investigate the phase structure of the deterministic and disordered versions of the Russian Doll Model (RDM), which is a generalization of Richardson model of superconductivity…