Experimental Study of Active LRC Circuits with PT-Symmetries

Details Experimental Study of Active LRC Circuits with PT-Symmetries Experimental Study of Active LRC Circuits with PT-Symmetries

2011-09-13

arxiv.org/abs/1109.2913v1

Physics

Condensed Matter

Other Condensed Matter

4 pages, 4 figures, Rapid Communication in Physical Review A (2011)

Scientific paper

Mutually coupled modes of a pair of active LRC circuits, one with amplification and another with an equivalent amount of attenuation, provide an experimental realization of a wide class of systems where gain/loss mechanisms break the Hermiticity while preserving parity-time PT symmetry. For a value PT of the gain/loss strength parameter the eigen-frequencies undergo a spontaneous phase transition from real to complex values, while the normal modes coalesce acquiring a definite chirality. The consequences of the phase-transition in the spatiotemporal energy evolution are also presented.

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