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Coherent control is a quantum mechanical based method for controlling dynamical processes by light. The basic principle is to control quantum interference phenomena typically by shaping the phase of a laser pulses 〔Gordon, Robert J., and Stuart A. Rice. "Active control of the dynamics of atoms and molecules." Annual review of physical chemistry 48, no. 1 (1997): 601-641.〕 .〔Shapiro, Moshe, and Paul Brumer. "Coherent control of atomic, molecular, and electronic processes." Advances in atomic, molecular, and optical physics 42 (2000): 287-345.〕 The basic ideas have proliferated finding vast application in spectroscopy mass spectra, quantum information processing, laser cooling, ultracold physics and more. ==Brief History== The initial idea was to control the outcome of chemical reactions. Two approaches were pursued: In the time domain a pump dump scheme where the control is the time delay between pulses 〔Tannor, David J., and Stuart A. Rice. "Control of selectivity of chemical reaction via control of wave packet evolution." The Journal of chemical physics 83, no. 10 (1985): 5013-5018.〕 〔Tannor, David J., Ronnie Kosloff, and Stuart A. Rice. "Coherent pulse sequence induced control of selectivity of reactions: Exact quantum mechanical calculations." The Journal of chemical physics 85, no. 10 (1986): 5805-5820.〕 and in the frequency domain, interfering pathways controlled by one and three photons.〔Brumer, Paul, and Moshe Shapiro. "Control of unimolecular reactions using coherent light." Chemical physics letters 126, no. 6 (1986): 541-546.〕 The two basic methods eventually merged with the introduction of optimal control theory 〔Peirce, Anthony P., Mohammed A. Dahleh, and Herschel Rabitz. "Optimal control of quantum-mechanical systems: Existence, numerical approximation, and applications." Physical Review A 37, no. 12 (1988): 4950.〕 .〔Kosloff, Ronnie, Stuart A. Rice, Pier Gaspard, Sam Tersigni, and D. J. Tannor. "Wavepacket dancing: Achieving chemical selectivity by shaping light pulses." Chemical Physics 139, no. 1 (1989): 201-220.〕 Experimental realisations soon followed. In the time domain 〔Baumert, T., V. Engel, Ch Meier, and G. Gerber. "High laser field effects in multiphoton ionization of . Experiment and quantum calculations." Chemical physics letters 200, no. 5 (1992): 488-494.〕 and in the frequency domain.〔Zhu, Langchi, Valeria Kleiman, Xiaonong Li, Shao Ping Lu, Karen Trentelman, and Robert J. Gordon. "Coherent laser control of the product distribution obtained in the photoexcitation of HI." SCIENCE-NEW YORK THEN WASHINGTON- (1995): 77-77.〕 Two interlinked developments accelerated the field of coherent control: Experimentally it was the development of pulse shaping by a spatial light modulator 〔Liquid Crystal Optically Addressed Spatial Light Modulator'', () *Slinger, C.; Cameron, C.; Stanley, M.; ("Computer-Generated Holography as a Generic Display Technology" ), ''IEEE Computer'', Volume 38, Issue 8, Aug. 2005, pp 46–53〕 and its employment in coherent control.〔Kawashima, Hitoshi, Marc M. Wefers, and Keith A. Nelson. "Femtosecond pulse shaping, multiple-pulse spectroscopy, and optical control." Annual review of physical chemistry 46, no. 1 (1995): 627-656.〕 The second development was the idea of automatic feedback control 〔Judson, Richard S., and Herschel Rabitz. "Teaching lasers to control molecules." Physical Review Letters 68, no. 10 (1992): 1500.〕 and its experimental realization .〔Assion, Andreas, T. Baumert, M. Bergt, T. Brixner, B. Kiefer, V. Seyfried, M. Strehle, and G. Gerber. "Control of chemical reactions by feedback-optimized phase-shaped femtosecond laser pulses." Science 282, no. 5390 (1998): 919-922.〕 〔Brif, Constantin, Raj Chakrabarti, and Herschel Rabitz. ()"Control of quantum phenomena: past, present and future." New Journal of Physics 12, no. 7 (2010): 075008.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Coherent control」の詳細全文を読む スポンサード リンク
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