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EnglishWe discuss in detail a modified variational matrix product state algorithm for periodic boundary conditions, based on a recent work by Pippan et al (2010 Phys. Rev. B 81 081103(R)), which enables one to study large systems on a ring (composed of N ~ 100 sites). In particular, we introduce a couple of improvements allowing us to enhance the algorithm in terms of stability and reliability. We employ such a method to compute the stiffness of one-dimensional strongly correlated quantum lattice systems. The accuracy of our calculations is tested in the exactly solvable spin-1/2 Heisenberg chain.
http://hdl.handle.net/11384/10469| Titolo: | Stiffness in 1D matrix product states with periodic boundary conditions |
| Autori interni: | ROSSINI, DAVIDE GIOVANNETTI, VITTORIO FAZIO, ROSARIO |
| Data di pubblicazione: | 2011 |
| Rivista: | JOURNAL OF STATISTICAL MECHANICS: THEORY AND EXPERIMENT |
| Abstract: | We discuss in detail a modified variational matrix product state algorithm for periodic boundary conditions, based on a recent work by Pippan et al (2010 Phys. Rev. B 81 081103(R)), which enables one to study large systems on a ring (composed of N ~ 100 sites). In particular, we introduce a couple of improvements allowing us to enhance the algorithm in terms of stability and reliability. We employ such a method to compute the stiffness of one-dimensional strongly correlated quantum lattice systems. The accuracy of our calculations is tested in the exactly solvable spin-1/2 Heisenberg chain. |
| Handle: | http://hdl.handle.net/11384/10469 |
| Appare nelle tipologie: | 1.1 Articolo in rivista |
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