Title: Cooperative Spontaneous Emission and Scattering of Light: A
Theory of Coherent Radiation Damping
Lecturer：Roy.J. Glauber, Professor of Physics, Harvard University, USA
时间：2007.6.28, 3:30pm
地点：玉泉校区(物理系)教12，201会议室
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Abstract: A quantum radiated by any one of a collection of identical
atoms may be absorbed by others and re-emitted many times before it
emerges. The radiation is thus best described as a collective process.
It takes place only in certain favored modes that have a particular
range of decay lifetimes and corresponding ranges of spectral level
shifts and linewidths. The light that these atoms scatter resonantly
also reflects this complex spectral structure.

报告人介绍：
Born Sept. 1, 1925, New York City, N.Y., U.S.American physicist, who won one-half of the Nobel Prize for Physics in 2005 for contributions to the field of optics, the branch of physics that deals with the physical properties of light and its interactions with matter. (The other half of the award was shared by John L. Hall and Theodor W. Hänsch.)
Glauber received a Ph.D. in physics from Harvard University in 1949. He then conducted research at the Institute for Advanced Studies in Princeton, N.J., and at the California Institute of Technology. In 1952 he returned to Harvard, where he continued to teach into the early 21st century.
Glauber's prizewinning work centred on his development of a theory that advanced the understanding of light by describing the behaviour of light particles (light quanta, or photons). Presented in the early 1960s, the theory merged the field of optics with quantum physics (which deals with the behaviour of matter on the atomic and subatomic scales), and it formed the basis for the development of a new field, quantum optics. Glauber's research helped clarify how light had both wavelike and particlelike characteristics and explained the fundamental differences between the light emitted by hot objects, such as electric light bulbs, and the light emitted by lasers. (Hot sources of light emit incoherent light, which consists of many different frequencies and phases, whereas lasers emit coherent light, light with a uniform frequency and phase.)
Practical applications of Glauber's work included the development of highly secure codes in the field known as quantum cryptography. His research also had a central role in efforts to develop a new generation of computers, so-called quantum computers, which would be extraordinarily fast and powerful and use quantum-mechanical phenomena to process data as qubits, or quantum bits, of information.
Roy.J. Glauber教授在量子光学领域内的突出贡献，2005年诺贝尔奖委员会将1/2的诺贝尔物理学授予Roy.J. Glauber教授。Roy.J. Glauber教授1949年获得哈佛大学的博士学位，曾在普林斯顿大学，瑞士联邦工业大学，加州理工学院和哈佛大学等世界著名大学任教和任职。1960年代初，他把量子物理与光学结合，建立了一个新的物理学领域－量子光学。这一理论帮助人们深刻认识光的波粒二相性，解释光与物质相互作用的基本问题，如激光的辐射等。目前，量子光学的发展已取得了实际的应用，如：量子密码，量子通信，量子信息和量子计算机等领域。