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Article Abstract
We apply a voltage pulse to electrically excite the incompressible region of a two-dimensional electron liquid in the ν=2/3 fractional quantum Hall state and investigate the collective excitations in both the bulk and edge via photoluminescence spectral energy shifts. Introducing an offset in the voltage pulse significantly enhances the excitation signal. Real-space and time-resolved measurements reveal the dynamics of the bulk excitations, with an estimated group velocity of approximately 3×10^{4} m/s. These bulk excitations align well with the magnetoplasmon model. Because bulk and edge magnetoplasmons are composed of two polarization degrees of freedom of the gauge field, our results highlight a connection that could serve as a resource for their entanglement-similar to the polarization of a photon-and offer a novel approach to exploring solid-state analogs of quantum gravity.
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