Doublon–holon pair creation in Mott–Hubbard systems in analogy to QED

Via the hierarchy of correlations, we study doublon–holon pair creation in the Mott state of the Fermi–Hubbard model (in higher dimensions) induced by a time-dependent electric field. Special emphasis is placed on the analogy to electron–positron pair creation from the vacuum in quantum electrodynam...

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Bibliographic Details
Published in:New Journal of Physics
Main Authors: F Queisser, K Krutitsky, P Navez, R Schützhold
Format: Article
Language:English
Published: IOP Publishing 2025-01-01
Subjects:
Hubbard model
QED analogue
hierarchy of correlations
Online Access:https://doi.org/10.1088/1367-2630/adaf4e
Description
Summary:Via the hierarchy of correlations, we study doublon–holon pair creation in the Mott state of the Fermi–Hubbard model (in higher dimensions) induced by a time-dependent electric field. Special emphasis is placed on the analogy to electron–positron pair creation from the vacuum in quantum electrodynamics. We find that the accuracy and applicability of this analogy depends on the spin structure of the Mott background. For Ising type anti-ferromagnetic order, we derive an effective Dirac equation. A Mott state without any spin order or spin polarized states do not explicitly display the same quasi-relativistic behavior.
ISSN:1367-2630

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