Physics – Condensed Matter – Disordered Systems and Neural Networks
Scientific paper
2008-10-05
Phys.Rev.Lett.102:210403,2009
Physics
Condensed Matter
Disordered Systems and Neural Networks
The version to be published in Phys. Rev. Lett.. many typos corrected; the suggested experiment was clarified;
Scientific paper
10.1103/PhysRevLett.102.210403
We study theoretically the localization of relativistic particles in disordered one-dimensional chains. It is found that the relativistic particles tend to dislocation in comparison with the non-relativistic particles with the same disorder strength. More intriguingly, we reveal that the massless Dirac particles are entirely delocalized for any energy due to the inherent chiral symmetry, leading to a well-known result that particles are always localized in one-dimensional system for arbitrary weak disorders to break down. Furthermore, we propose a feasible scheme to simulate and detect the delocalization feature of the Dirac particles with cold atoms..
Wang Zheng-Dong
Zhang Dan-Wei
Zhu Shi-Liang
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