Density oscillation in highly flattened quantum elliptic rings and tunable strong dipole radiation

Details Density oscillation in highly flattened quantum elliptic rings and tunable strong dipole radiation Density oscillation in highly flattened quantum elliptic rings and tunable strong dipole radiation

2007-04-06

arxiv.org/abs/0704.0867v1

Physics

Condensed Matter

Other Condensed Matter

5 pages, 8 figures

Scientific paper

A narrow elliptic ring containing an electron threaded by a magnetic field B is studied. When the ring is highly flattened, the increase of B would lead to a big energy gap between the ground and excited states, and therefore lead to a strong emission of dipole photons. The photon frequency can be tuned in a wide range by changing B and/or the shape of the ellipse. The particle density is found to oscillate from a pattern of distribution to another pattern back and forth against $B$. This is a new kind of Aharonov-Bohm oscillation originating from symmetry breaking and is different from the usual oscillation of persistent current.

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