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Quantum backflow of a Dirac fermion on a ring
Valentin Daniel Paccoia, Orlando Panella, Pinaki Roy
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Source: Crossref
Published: Oct 21, 2026
DOI: 10.1088/1751-8121/aea2f9
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Abstract We study the quantum backflow problem of a relativistic charged Dirac fermion constrained to move on a ring of radius R . Using the relativistic current operator we compute the probability flux through a generic time interval to show emergence of quantum backflow. We also discuss the limiting case when the particle moves along a line.
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