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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.
Cho, Soo-Muk,Koshino, Hiroyuki,Yu, Seung-Hun,Yoo, Ick-Dong 충남대학교 생물공학연구소 1999 생물공학연구지 Vol.7 No.-
A heterogalactan, fomitellan A. was isolated from a 0.9% sodium chloride extract of the fruit bodies of Fomitella fraxinea by a combination of fractionation procedures, including precipitation with ethanol and chromatography on columns of DEAE-cellulose and Toyopearl HW 65F. On employing gel permeation-high performance liquid chromatograpy, fomitellan A exhibited a single peak with a molecular weight of 15 kDa. The results of methylation, and ^1 H and ^13C NMR spectroscopic analyses indicated that the heterogalactan fomitellan A was a repeating unit (pentasaccharide) composed of a backbone with (1 → 6)-linked D-galactopyranosyl residues. Its C-2 atom position was substituted with disaccharide units of 3-0-_D-mannopyranosyl-_L-fucopyranosyl residues. The fucomannaogalactan (fomitellan A) from Fomitella fraxinea showed pronounced immunostimulating activity in an in vitro lymphocytes proliferation assay. ⓒ 1998 Elsevier Science Ltd. All rights reserved.