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- W2950931099 abstract "We consider a network model, embedded on the Manhattan lattice, of a quantum localisation problem belonging to symmetry class C. This arises in the context of quasiparticle dynamics in disordered spin-singlet superconductors which are invariant under spin rotations but not under time reversal. A mapping exists between problems belonging to this symmetry class and certain classical random walks which are self-avoiding and have attractive interactions; we exploit this equivalence, using a study of the classical random walks to gain information about the corresponding quantum problem. In a field-theoretic approach, we show that the interactions may flow to one of two possible strong coupling regimes separated by a transition: however, using Monte Carlo simulations we show that the walks are in fact always compact two-dimensional objects with a well-defined one-dimensional surface, indicating that the corresponding quantum system is localised." @default.
- W2950931099 created "2019-06-27" @default.
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- W2950931099 date "2002-10-17" @default.
- W2950931099 modified "2023-09-27" @default.
- W2950931099 title "Quantum and classical localisation and the Manhattan lattice" @default.
- W2950931099 hasPublicationYear "2002" @default.
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