Breit-Wigner profile

The almost Breit-Wigner profiles correspond to the almost exponential decays of the two weakly interacting resonances in (c) and (d). The interference between the two resonances in (b) is similar to the interferences appearing in Fano profiles (Section 2.2.3, Figure 1.6). 

In the following sections we will apply the theory to a resonance decaying into a continuum (Section 2.2) and to several resonances decaying into one or several continua (Section 2.3). The physics is described and understood by means of energy-independent effective Hamiltonians (16) and from the method of moments. In Section 2.2 the use of a unique two-dimensional matrix representation (n = 2) of the effective Hamiltonian will allow us to produce the most basic Breit-Wigner and Eano profiles as well as an elementary formulation of the fluctuation-dissipation theorem. In Section 2.3 more elaborate matrix representations (n = 3) will be used to investigate... 

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