1204.3325 (G. L. Celardo et al.)

Interplay of superradiance and disorder in the Anderson Model    [PDF]

G. L. Celardo, A. Biella, L. Kaplan, F. Borgonovi

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.

View original: http://arxiv.org/abs/1204.3325