3 papers
cond-mat.str-el2026
Topology and Quantum-Spin-Classical-Spin Crossover of the Gapped Kondo Effect
David Krüger, Michael Potthoff
The gapped Kondo effect describes the screening of an impurity spin locally coupled via an antiferromagnetic exchange interaction to a conduction-electron system exhibi…
cond-mat.mes-hall2025
Exchangeless braiding of Majorana zero modes in weakly coupled Kitaev chains
Robin Quade, Michael Potthoff
Exchangeless braiding of Majorana modes is studied in minimal networks of weakly hybridized Kitaev chains of finite length using a rigorous many-body framework. In particular, for…
cond-mat.mes-hall2024
Microscopic theory of spin friction and dissipative spin dynamics
Nicolas Lenzing, David Krüger, Michael Potthoff
The real-time dynamics of local magnetic moments exchange coupled to a metallic system of conduction electrons is subject to dissipative friction even in the absence of spin-orbit…