J. Phys. IV France 12 (2002) Pr9-123
DOI: 10.1051/jp4:20020376

Quantum phase slips and thermal fluctuations in one-dimensional disordered density waves

A. Glatz and T. Nattermann

Institut fur Theoretische Physik, Universitat zu Koln, Zulpicher Str. 77, 50937 Koln, Germany

Abstract
The low temperature phase diagram of 1D disordered quantum systems like charge or spin density waves, superfluids, and related systems is considered by a full finite T renormalization group approach for the first time. At zero temperature the consideration of quantum phase slips leads to a new scenario for the unpinning (delocalization) transition. In the strong pinning limit the model is solved exactly. At finite T a rich crossover diagram with various scaling regions is found which reflects the zero temperature quantum critical behavior.

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