Decohering localized waves

Abstract

In the absence of confinement localization of waves takes place due to randomness or nonlinearity and relies on their phase coherence. We quantitatively probe the sensitivity of localized wave packets to random phase fluctuations and confirm the necessity of phase coherence for localization. Decoherence resulting from a dynamical random environment leads to diffusive spreading and destroys linear and nonlinear localization. We find that maximal spreading is achieved for optimal phase fluctuation characteristics which is a consequence of the competition between diffusion due to decoherence and ballistic transport within the mean free path distance.

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References in corpus (7)

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• Absence of Wavepacket Diffusion in Disordered Nonlinear Systems
• Quantum Walks on a Random Environment
• The crossover from strong to weak chaos for nonlinear waves in disordered systems
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Cited by in corpus (11)

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• Nonlinear Lattice Waves in Random Potentials
• Spinful Aubry-Andre model in a magnetic field: Delocalization facilitated by a weak spin-orbit coupling
• Measuring a localization phase diagram controlled by the interplay of disorder and driving
• Approximating Metal-Insulator Transitions
• Chaotic behaviour of disordered nonlinear lattices
• Dephasing-assisted macrospin transport