Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2007-07-08
Phys. Rev. B, 77, 174434 (2008)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
7 pages, same as the published version
Scientific paper
10.1103/PhysRevB.77.174434
We systematically investigate the universal spin decoherence dynamics of a localized electron in an arbitrary nuclear spin bath, which can be even far away from equilibrium due to the weak nuclear-lattice interaction. We show that the electron spin relaxation dynamics (as well as spin pure dephasing and Hahn echo decay) can {\it always} have a universal behavior as long as the initial state is composed of a sufficiently large amount of spin eigenstates. For a given system, the pattern of the universal dynamics depends on the complicated initial condition only via a {\it single} parameter, which measures the amount of phase coherence between different spin eigenstates in the initial state. Our results apply even when the number of the involved nuclei is not large, and therefore provide a solid foundation in the comparison of theoretical/numerical results with the experimental measurement. As an example, we also show numerical results for systems of noninteracting spin bath in zero magnetic field regime, and discuss the features of universal decoherent dynamics.
Chen Pochung
Tian Yi-Ya
Wang Daw-Wei
No associations
LandOfFree
Universal dynamics of quantum spin decoherence in a spin bath does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Universal dynamics of quantum spin decoherence in a spin bath, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Universal dynamics of quantum spin decoherence in a spin bath will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-712617