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Quantum Magnetism

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Handbook of Magnetism and Magnetic Materials

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Abstract

Macroscopic quantum effects have been familiar since the discovery of superfluids and superconductors over 100 years ago. In the last few decades, it has been understood how large-scale quantum effects can also show up in “spin space.” The collective tunneling of many spins was observed in magnetic nanomolecules and in insulating dipolar-coupled spin arrays, and the tunneling of ferromagnetic domain walls has also been cleanly identified. To see large-scale coherence or entanglement effects, the decoherence caused by interactions with the environment (particularly with nuclear spins) must be controlled. Theory indicates ways of doing this, and systems ranging from classic magnetic compounds to deterministically doped silicon will make the job easier. Coherent control of quantum spin arrays, and large-scale quantum spin superpositions, is a likely prospect for the future.

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Author information

Authors and Affiliations

  1. Physics Department (ETHZ), Institut de Physique (EPFL) and Photon Science Division (PSI), ETHZ, EPFL and PSI, Zürich, Lausanne and Villigen, Switzerland

    Gabriel Aeppli

  2. Pacific Institute of Theoretical Physics, University of British Columbia, Vancouver, BC, Canada

    Philip Stamp

Authors
  1. Gabriel Aeppli
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  2. Philip Stamp
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Correspondence to Gabriel Aeppli or Philip Stamp .

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Editors and Affiliations

  1. School of Physics, Trinity College, Dublin, Ireland

    J. M. D. Coey

  2. Max Planck Institute of Microstructure Physics, Halle (Saale), Germany

    Stuart S.P. Parkin

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Aeppli, G., Stamp, P. (2021). Quantum Magnetism. In: Coey, J.M.D., Parkin, S.S. (eds) Handbook of Magnetism and Magnetic Materials. Springer, Cham. https://doi.org/10.1007/978-3-030-63210-6_5

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