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- W3147083045 abstract "We consider periodic quantum Hamiltonians on the torus phase space (Harper-like Hamiltonians). We calculate the topological Chern index which characterizes each spectral band in the generic case. This calculation is made by a semiclassical approach with the use of quasi- modes. As a result, the Chern index is equal to the homotopy of the path of these quasi-modes on phase space as the Floquet parameter of the band is varied. It is quite interesting that the Chern indices, defined as topological quantum numbers, can be expressed from simple properties of the classical trajectories." @default.
- W3147083045 created "2021-04-13" @default.
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- W3147083045 date "2000-01-01" @default.
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- W3147083045 title "Topological properties of quantum periodic Hamiltonians" @default.
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