Publication

Decoherence and pointer states in small antiferromagnets: A benchmark test

Donker, H. C., De Raedt, H. & Katsnelson, M. I., 2017, In : SciPost Physics. 2, p. 1-21 22 p., 010.

Research output: Contribution to journalArticleAcademicpeer-review

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 exact pointer states. Decoherence near the two limits is examined whereby entropy is used to quantify the 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.

Original languageEnglish
Article number010
Pages (from-to)1-21
Number of pages22
JournalSciPost Physics
Volume2
Publication statusPublished - 2017

    Keywords

  • SPIN-BATH, QUANTUM, PREDICTABILITY, UNIVERSALITY, CLASSICALITY, ENVIRONMENTS, DYNAMICS, SYSTEM, ATOMS

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