Artikel,

Quantum k-core conduction on the Bethe lattice

, und .
Physical Review B, (25.09.2010)
DOI: 10.1103/PhysRevB.82.104211

Zusammenfassung

Classical and quantum conduction on a bond-diluted Bethe lattice is considered. The bond dilution is subject to the constraint that every occupied bond must have at least \$k-1\$ neighboring occupied bonds, i.e. \$k\$-core diluted. In the classical case, we find the onset of conduction for \$k=2\$ is continuous, while for \$k=3\$, the onset of conduction is discontinuous with the geometric random first-order phase transition driving the conduction transition. In the quantum case, treating each occupied bond as a random scatterer, we find for \$k=3\$ that the random first-order phase transition in the geometry also drives the onset of quantum conduction giving rise to a new universality class of Anderson localization transitions.

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