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arXiv:1708.05220 · The European Physical Journal Plus

The exponential laws for emission and decaying of entangled atoms

Pedro Sancho

Published Aug 1, 2017• 0 citations
arXivHTMLPDF
DOI
10.1140/epjp/i2017-11591-8

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We investigate the spontaneous emission of a two-level system coupled to a photonic waveguide, showing that dynamical dephasing in the photon modes profoundly alters the decay law. In the absence of dephasing, the emitter displays conventional exponential decay followed by a long-time power-law tail -- observable only at extremely low survival probabilities. Strikingly, when dephasing is introduced, a robust power-law decay emerges already at short times, driven by photon diffusion in the dynamically disordered environment rather than spectral edge effects. These results reveal a novel, decoherence-induced mechanism for non-exponential spontaneous emission in waveguide QED platforms.