Dynamics of large anisotropic spin in a sub-ohmic dissipative environment close to a quantum-phase transition
| dc.creator | Anders, Frithjof B. | |
| dc.date | 2008-04-09 | |
| dc.date.accessioned | 2026-07-07T12:29:22Z | |
| dc.date.available | 2026-07-07T12:29:22Z | |
| dc.description | We investigate the dynamics of a large anisotropic spin whose easy-axis component is coupled to a bosonic bath with a spectral function $J(\w)\propto ω^s$. Such a spin complex might be realized in a single-molecular magnet. Using the non-perturbative renormalization group, we calculate the line of quantum-phase transitions in the sub-ohmic regime ($s<1$). These quantum-phase transitions only occur for integer spin $J$. For half-integer $J$, the low temperature fixed-point is identical to the fixed-point of the spin-boson model without quantum-tunneling between the two levels. Short-time coherent oscillations in the spin decay prevail even into the localized phase in the sub-ohmic regime. The influence of the reorganization energy and the recurrence time on the decoherence in the absence of quantum-tunneling is discussed. | |
| dc.description | 14 pages,7 figures | |
| dc.identifier | https://arxiv.org/abs/0804.1457 | |
| dc.identifier | http://arxiv.org/abs/0804.1457 | |
| dc.identifier | New J. Phys. 10 115007 (2008) | |
| dc.identifier | doi:10.1088/1367-2630/10/11/115007 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/215854 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.subject | Statistical Mechanics | |
| dc.title | Dynamics of large anisotropic spin in a sub-ohmic dissipative environment close to a quantum-phase transition | |
| dc.type | text |