Journal
PHYSICAL REVIEW LETTERS
Volume 94, Issue 14, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.94.144101
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We quantify the presence of direct processes in the S matrix of chaotic microwave cavities with absorption in the one-channel case. To this end the full distribution P-S(S) of the S matrix, i.e., S = root Re-i theta, is studied in cavities with time-reversal symmetry for different antenna coupling strengths T-a or direct processes. The experimental results are compared with random-matrix calculations and with numerical simulations including absorption. The theoretical result is a generalization of the Poisson kernel. The experimental and the numerical distributions are in excellent agreement with theoretical predictions for all cases.
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