Decoherence from spin environments
By F. Cucchietti, J. Paz, Wojciech H. Zurek. 2003
192 citations recorded by the source corpus.
We examine two exactly solvable models of decoherence\char22{}a central spin-system, (i) with and (ii) without a self-Hamiltonian, interacting with a collection of environment spins. In the absence of a self-Hamiltonian we show that in this model (introduced some time ago to illustrate environment-induced superselection) generic assumptions about the coupling strengths can lead to a universal (Gaussian) suppression of coherence between pointer states. On the other hand, we show that when the dynamics of the central spin is dominant a different regime emerges, which is characterized by a non-Gaussian decay and a dramatically different set of pointer states. We explore the regimes of validity of the Gaussian decay and discuss its relation to the spectral features of the environment and to the Loschmidt echo (or fidelity).
Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics
View Paper: https://www.semanticscholar.org/paper/2e144eb5d701efa701a14ddde695c8a10c579f26
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In Artificial Intelligence
In Atomic and Molecular Physics, and Optics
Citations in the corpus
- Decoherence, entanglement and irreversibility in quantum dynamical systems with few degrees of freedom (2008, methodology): “We foresee in that context that RMT might allow to perform controlled analytical calculations beyond models of noninteracting many-spin bath (Cucchietti et al., 2005; Zurek, 1992; Zurek et al., 2007).”