Dephasing of Atomic Tunneling by Nuclear Quadrupoles
Alois W\"urger, Andreas Fleischmann, Christian Enss
TL;DR
This paper proposes a new dephasing mechanism involving nuclear quadrupole moments to explain the magnetic-field dependence of coherent echoes observed in amorphous solids.
Contribution
It introduces nuclear quadrupole moments as a novel factor causing dephasing in atomic tunneling systems under magnetic fields.
Findings
Nuclear quadrupole moments influence atomic tunneling dephasing.
Magnetic-field dependence of coherent echoes is explained by quadrupole interactions.
The mechanism aligns with recent experimental observations.
Abstract
Recent experiments revealed a most surprising magnetic-field dependence of coherent echoes in amorphous solids. We show that a novel dephasing mechanism involving nuclear quadrupole moments is the origin of the observed magnetic-field dependence.
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