The paper derives and numerically tests semiclassical equations of motion for wave packets in non-Hermitian topological systems, where complex Berry curvature produces an anomalous force as well as an anomalous velocity.
Angular Momentum-Dependent Spectral Shift in Chiral Vacuum Cavities
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abstract
Based on a hybrid light-matter unitary transformation for cavity quantum electrodynamics, we investigate the spectral shift of an atom induced by quantum fluctuations in a chiral vacuum cavity. Remarkably, we find an intriguing angular momentum-dependent shift in the spectra of bound states. Our approach shows promise in going beyond traditional perturbative methods and demonstrates effectiveness even in the strong-coupling limit, as evidenced by our numerical benchmarks in the case of a two-dimensional quantum harmonic oscillator. In addition, we establish a cavity-interaction picture for calculating the chiral vacuum Rabi oscillation in the strong-coupling limit for a generic central potential. The anomalous spectral shift revealed in this study possesses both fundamental and practical significance and could be readily observed in experiments.
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Non-Hermitian wave-packet dynamics and its realization within a non-Hermitian chiral cavity
The paper derives and numerically tests semiclassical equations of motion for wave packets in non-Hermitian topological systems, where complex Berry curvature produces an anomalous force as well as an anomalous velocity.