منابع مشابه
Topological Hermitian Cobordism
A decade ago, the authors [5] studied Real cobordismMR, anRO(Z/2)graded Z/2-equivariant spectrum discovered by Landweber [9], which is related to complex cobordismMU in the same way as Atiyah’s RealKtheory KR [1] does to K-theory. In particular, the authors computed the RO(Z/2)-graded coefficients of MR. A key step in that computation was the fact that MR is a complete Z/2-equivariant spectrum,...
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We analyze a quantum walk on a bipartite one-dimensional lattice, in which the particle can decay whenever it visits one of the two sublattices. The corresponding non-Hermitian tight-binding problem with a complex potential for the decaying sites exhibits two different phases, distinguished by a winding number defined in terms of the Bloch eigenstates in the Brillouin zone. We find that the mea...
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ژورنال
عنوان ژورنال: Physical Review Research
سال: 2020
ISSN: 2643-1564
DOI: 10.1103/physrevresearch.2.023173