Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2001-09-10
Phys. Rev. Lett. 88, 256403 (2002)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
4 pages, 3 figures. Additional results, added clarifications, updated references
Scientific paper
10.1103/PhysRevLett.88.256403
The density-matrix renormalization-group (DMRG) algorithm is extended to treat time-dependent problems. The method provides a systematic and robust tool to explore out-of-equilibrium phenomena in quantum many-body systems. We illustrate the method by showing that attractive interactions enhance the tunneling current between two Luttinger liquids, whereas repulsive interactions suppress it, in qualitative agreement with analytical predictions. Enhancement of the transport current through a quantum dot in the Kondo regime is also exhibited.
Cazalilla Miguel A.
Marston J. . B.
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