Semiclassical dynamics, Berry curvature, and spiral holonomy in optical quasicrystals
Semiclassical dynamics, Berry curvature, and spiral holonomy in optical quasicrystals
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光学准晶体中的半经典动力学、贝里曲率和螺旋完整性
DOI:
10.1103/physreva.97.043603
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发表时间:
2018
影响因子:
2.9
通讯作者:
Spurrier S
中科院分区:
文献类型:
--
作者:
Spurrier S
We describe the theory of the dynamics of atoms in two-dimensional quasicrystalline optical lattices. We focus on a regime of shallow lattice depths under which the applied force can cause Landau-Zener tunneling past a dense hierarchy of gaps in the quasiperiodic energy spectrum. We derive conditions on the external force that allow for a “semiadiabatic” regime in which semiclassical equations of motion can apply, leading to Bloch oscillations between the edges of a pseudo-Brillouin-zone. We verify this semiclassical theory by comparing to the results of an exact numerical solution. Interesting features appear in the semiclassical dynamics for the quasicrystal for a particle driven in a cyclic trajectory around the corner of the pseudo-Brillouin-zone: The particle fails to return to its initial state, providing a realization of a “spiral holonomy” in the dynamics. We show that there can appear anomalous velocity contributions, associated with nonzero Berry curvature. We relate these to the Berry phase associated with the spiral holonomy, and show how the Berry curvature can be accessed from the semiclassical dynamics. Finally, by identifying the pseudo-Brillouin-zone as a higher genus surface, we show that the Chern number classification for periodic systems can be extended to a quasicrystal, thereby determining a topological index for the system.
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DOI:
10.1088/0953-8984/4/47/024
发表时间:
1992
期刊:
Journal of Physics: Condensed Matter
影响因子:
--
作者:
S. Burkov
通讯作者:
S. Burkov
影响因子:
19.6
作者:
Aidelsburger, M.;Lohse, M.;Goldman, N.
通讯作者:
Goldman, N.
影响因子:
8.6
作者:
Smith;Ashcroft
通讯作者:
Ashcroft
DOI:
10.1103/physrevb.38.8067
发表时间:
1988
期刊:
Physical review. B, Condensed matter
影响因子:
--
作者:
Lu;Birman
通讯作者:
Birman
DOI:
10.1140/epjb/e2013-40261-6
发表时间:
2013
期刊:
The European Physical Journal B
影响因子:
--
作者:
S. Rolof;S. Thiem;M. Schreiber
通讯作者:
M. Schreiber