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Use of a Classical Input for Solving Two-Photon Nonlinear Dynamics
Kazuki Koshino 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.2
If the nonlinear dynamics of single photons is to be analyzed quantitatively, it is essential to quantize both the photon eld and the material system and to take account of the multimode nature of the photon field rigorously. A problem in using this rigorous formalism is that extensive computation is inevitable. The present study revealed that the analyses of two-photon nonlinear dynamics can be much simplified by assuming a classical input pulse. More concretely, the nonlinear phase shift and the output two-photon wave function can be evaluated from the one-and two-point correlation functions in the output. The proposed method is useful for designing optical quantum information devices, where quantitative consideration of the fidelity between photonic pulses is essential.