Quantum backflow for a massless Dirac fermion on a ring

被引：2
作者：
Di Bari, Leonardo [1 ]
Paccoia, Valentin Daniel [1 ]
Panella, Orlando [2 ]
Roy, Pinaki [3 ,4 ]
机构：
[1] Univ Perugia, Dipartimento Fis & Geol, Via A Pascoli, I-06123 Perugia, Italy
[2] Ist Nazl Fis Nucl, Sez Perugia, Via A Pascoli, I-06123 Perugia, Italy
[3] Ton Duc Thang Univ, Adv Inst Matenals Sci, Atom Mol & Opt Phys Res Grp, Ho Chi Minh City, Vietnam
[4] Ton Duc Thang Univ, Fac Appl Sci, Ho Chi Minh City, Vietnam
来源：
PHYSICS LETTERS A | 2023年 / 474卷
关键词：
Quantum backflow; Massless Dirac fermions; Circular ring; Magnetic field; 2-dim systems; PROBABILITY BACKFLOW; MECHANICS; ARRIVAL; TIME;
D O I：
10.1016/j.physleta.2023.128831
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study the quantum backflow problem for a massless charged Dirac fermion constrained to move on a ring of radius R. Using the relativistic current operator for states of definite magnetic quantum number it is shown that quantum backflow takes place on the ring. We also study the backflow problem on the line and it is shown that unlike massive fermions, massless fermions do not exhibit quantum backflow.(c) 2023 Elsevier B.V. All rights reserved.
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页数：7
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