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Multielectron geometric phase in intensity interferometry
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DOI：10.1103/PhysRevB.98.155113.png)
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摘要
En 中文
Pancharatnam's experimental findings on amplitude interferometry of polarized light during 1950's was an early example of the Berry phase. But a similar experimental realization of the geometric phase in the context of solid-state electronic systems where the polarization state of the photon is replaced by spin-polarized states of the electron remains unexplored. This is primarily due to the fact that the generation of Pancharatnam's geometric phase involves a discrete number of cyclic projective measurements on the polarized states of light, and an equivalent cyclic operation on electron spin is much harder to implement in a solid-state setting. In the present paper, we show that the edge states of the quantum spin Hall effect in conjunction with tunnel coupled spin-polarized electrodes (SPEs) provide us with a unique opportunity to generate Pancharatnam's type of geometric phase locally in space, which can be detected via electronic current measurements. We show that the controlled manipulation of the polarization directions of the SPEs results in coherent oscillations in the cross-correlated current noise, which can be attributed to a multiparticle version of Pancharatnam's geometric phase, and is directly related to the phenomenon of intensity interferometry. We demonstrate that the interference patterns produced due to the manipulation of the geometric phase in our proposed setup show a remarkable immunity to orbital dephasing owing to their spatially local origin.
Keyword:
BERRYS PHASE
POLARIZED-LIGHT
INTERFERENCE
CURRENTS
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期刊
IF:
3.7
论文数:
15.4W
被引数:
41.0W
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