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Probing Supercritical Fields with Real and with Artificial Nuclei

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Nuclear Physics: Present and Future

Part of the book series: FIAS Interdisciplinary Science Series ((FIAS))

Abstract

In the presence of strong electric fields the vacuum state of Quantum Electrodynamics (QED) becomes unstable and decays through the spontaneous production of electron-positron pairs. This is expected to occur, e.g., in constant electric fields exceeding a critical strength of \(E_\mathrm{cr} \simeq 1.3\cdot 10^{18}\) V/m and also in hypothetical atoms with a nuclear charge exceeding the critical value \(Z_\mathrm{cr} \simeq 172\). We discuss how supercritical quasiatoms can be created transiently in collisions of two heavy ions and discuss experimental signatures. We also report on an analogue of supercritical QED which has been found in solid-state physics. The electron states in the material graphene obey an effective Dirac-like equation. Depositing charged impurity atoms on the surface of a graphene sheet one can construct artificial supercritical atoms.

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Author information

Authors and Affiliations

  1. Institute for Theoretical Physics, Johann Wolfgang Goethe University, Frankfurt am Main, Germany

    Joachim Reinhardt

  2. Frankfurt Institute for Advanced Studies, Johann Wolfgang Goethe University, Frankfurt am Main, Germany

    Walter Greiner

Authors
  1. Joachim Reinhardt
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  2. Walter Greiner
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Correspondence to Joachim Reinhardt .

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Editors and Affiliations

  1. Frankfurt Institute for Advanced Studies Goethe Universität Frankfurt, Frankfurt, Germany

    Walter Greiner

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Reinhardt, J., Greiner, W. (2015). Probing Supercritical Fields with Real and with Artificial Nuclei. In: Greiner, W. (eds) Nuclear Physics: Present and Future. FIAS Interdisciplinary Science Series. Springer, Cham. https://doi.org/10.1007/978-3-319-10199-6_19

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