Quantum Monte Carlo simulations of S=1 disordered Heisenberg spin chains
Thermodynamic properties of dimer models and aperiodic quantum spin chains
Multi-user equipment approved in grant 2015/23849-7: computer cluster
| Full text | |
| Author(s): |
Voliotis, Dimitrios
Total Authors: 1
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| Document type: | Journal article |
| Source: | Journal of Physics A-Mathematical and Theoretical; v. 52, n. 47 NOV 22 2019. |
| Web of Science Citations: | 0 |
| Abstract | |
Recently, it has been investigated that the ground-state wavefunction of the one dimensional quantum spin-1/2 chain models is multifractal in general with non-trivial fractal dimension. We are studying this phenomena for the quantum Ising chain with aperiodic perturbation. By performing a block real-space renormalization approach, we obtain the ground-state wave function and we extract the generalized multifractal dimension and the multifractal spectrum. For a spin chain with negative wandering exponent the multifractal quantities have the same behavior with the unperturbed chain while for a spin chain with a vanishing wandering exponent, are dependent on the coupling ratio. Finally, for a spin chain with a positive wandering exponent, the multifractal quantities present a different non-linear behavior. (AU) | |
| FAPESP's process: | 17/11484-0 - Dynamics of quantum quenched disordered spin chains |
| Grantee: | Dimitrios Voliotis |
| Support type: | Scholarships in Brazil - Post-Doctorate |