Interplay of superradiance and disorder in the Anderson Model

Details Interplay of superradiance and disorder in the Anderson Model Interplay of superradiance and disorder in the Anderson Model

2012-04-15

arxiv.org/abs/1204.3325v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

7 pages, submitted to the special issue on "Physics with non-Hermitian operators: Theory and Experiment" of the journal "Forts

Scientific paper

Using a non-Hermitian Hamiltonian approach to open systems, we study the interplay of disorder and superradiance in a one-dimensional Anderson model. Analyzing the complex eigenvalues of the non-Hermitian Hamiltonian, a transition to a superradiant regime is shown to occur. As an effect of openness the structure of eigenstates undergoes a strong change in the superradiant regime: we show that the sensitivity to disorder of the superradiant and the subradiant subspaces is very different; superradiant states remain delocalized as disorder increases, while subradiant states are sensitive to the degree of disorder.

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