Phase-space representation of Landau and electron coherent states for uniaxially strained graphene
| Autor: | Yonatan Betancur-Ocampo, Erik Díaz-Bautista |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Physics
Quantum optics Quantum Physics Condensed Matter - Materials Science Condensed matter physics Condensed Matter - Mesoscale and Nanoscale Physics Graphene Time evolution Materials Science (cond-mat.mtrl-sci) FOS: Physical sciences 02 engineering and technology Landau quantization Electron 021001 nanoscience & nanotechnology 01 natural sciences law.invention law Phase space Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Wigner distribution function Coherent states Quantum Physics (quant-ph) 010306 general physics 0210 nano-technology |
| Popis: | Recent experimental advances in the reconstruction of the Wigner function (WF) for electronic systems have led us to consider the possibility of employing this theoretical tool in the analysis of electron dynamics of uniaxially strained graphene. In this paper, we study the effect of strain on the WF of electrons in graphene under the interaction of a uniform magnetic field. This mechanical deformation modifies drastically the shape of the Wigner function of Landau and coherent states. The WF has a different behavior straining the material along the zigzag direction in comparison with the armchair one and favors the creation of electron coherent states. The time evolution of the WF for electron coherent states shows fluctuations between classical and quantum behavior around a closed path as time increases. The phase-space representation shows more clearly the effect of nonequidistant relative Landau levels in the time evolution of electron coherent states compared with other approaches. Our findings may be useful in establishing protocols for the realization of electron coherent states in graphene as well as a bridge between condensed matter and quantum optics. 31 pages, 7 figures |
| Databáze: | OpenAIRE |
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