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Open Quantum Systems Decoherence

Decoherence and pointer states in small antiferromagnets: A benchmark test

arXiv

Authors: H. C. Donker, H. De Raedt, M. I. Katsnelson

Year

2016

Paper ID

41918

Status

Preprint

Abstract Read

~2 min

Abstract Words

105

Citations

N/A

Abstract

We study the decoherence process of a four spin-1/2 antiferromagnet that is coupled to an environment of spin-1/2 particles. The preferred basis of the antiferromagnet is discussed in two limiting cases and we identify two it{exact} pointer states. Decoherence near the two limits is examined whereby entropy is used to quantify the it{robustness} of states against environmental coupling. We find that close to the quantum measurement limit, the self-Hamiltonian of the system of interest can become dynamically relevant on macroscopic timescales. We illustrate this point by explicitly constructing a state that is more robust than (generic) states diagonal in the system-environment interaction Hamiltonian.

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We study the decoherence process of a four spin-1/2 antiferromagnet that is coupled to an environment of spin-1/2 particles.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1612.03099 [2] arXiv https://arxiv.org/abs/1612.03099 [3] Publisher https://arxiv.org/abs/1612.03099

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