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Physics Today

Amplification by stimulated emission of radiation

H. J. Levinstein

Published Oct 1, 1961• 7 citations
Publisher

Abstract

The Spring Meeting of the New York State Section of the American Physical Society was held at LeMoyne College in Syracuse on April 14 and 15, 1961. More than 250 persons attended, mainly from the New York state area, although a few came from as far as California. This was the fourth in a series of highly successful semiannual meetings, each devoted to a selected current topic in physics. In contrast to Physical Society meetings on a national scale and topical conferences where research workers exchange ideas with others in the same field, each of these meetings is designed to bring to physicists the latest developments in an important and rapidly growing area of physics not generally their speciality. Meetings are held at various locations in the state, frequently upon invitation by a company or university. Previous meetings of the current series have been held at Rochester on fuel cells, at Hamilton on radio astronomy, and at Binghamton on computers.

DOI
10.1063/1.3057152

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The Spring Meeting of the New York State Section of the American Physical Society was held at LeMoyne College in Syracuse on April 14 and 15, 1961. More than 250 persons attended, mainly from the New York state area, although a few came from as far as California. This was the fourth in a series of highly successful semiannual meetings, each devoted to a selected current topic in physics. In contrast to Physical Society meetings on a national scale and topical conferences where research workers exchange ideas with others in the same field, each of these meetings is designed to bring to physicists the latest developments in an important and rapidly growing area of physics not generally their speciality. Meetings are held at various locations in the state, frequently upon invitation by a company or university. Previous meetings of the current series have been held at Rochester on fuel cells, at Hamilton on radio astronomy, and at Binghamton on computers.
During the last week of June 1960, a three-day conference on the coherence properties of electromagnetic radiation was held on the campus of the University of Rochester. Sponsored by the US Air Force, the University of Rochester, and the Optical Society of America, the purpose of the conference was to bring together optical and atomic physicists from this country and abroad to discuss problems of common interest dealing with the question of coherence throughout the electromagnetic spectrum. To a large extent motivation was supplied by a number of controversial and surprising developments in widely separated branches of physics within the last decade. Certainly much of the attention paid to questions of coherence after so many years of its having lain dormant is due in no small measure to the now famous Brown-Twiss experiment (1955) on the correlation in fluctuations of the output currents of two photoelectric detectors exposed to mutually coherent fields of light. The controversy that followed demonstrated clearly the lack of understanding of the statistical properties inherent in the emission, propagation, and detection of radiation. Whether or not one chose to explain the correlation as a natural tendency for bosons to clump or a natural interference effect among Fourier components in the finite spectral width of every natural source (or both) seemed at first to be a question of taste.
The present volume contains the texts of the invited talks delivered at the Fifth International Conference on Recent Progress in Many-Body Theories held in Oulu, Finland during the period 3-8 August 1987. The general format and style of the meeting followed closely those which had evolved from the earlier conferences in the series: Trieste 1978, Oaxtepec 1981, Altenberg 1983 and San Francisco 1985. Thus, the conferences in this series are in­ tended, as far as is practicable, to cover in a broad and balanced fashion both the entire spectrum of theoretical tools developed to tackle the quan­ tum many-body problem, and their major fields of· application. One of the major aims of the series is to foster the exchange of ideas and techniques among physicists working in such diverse areas of application of many-body theories as nucleon-nucleon interactions, nuclear physics, astronomy, atomic and molecular physics, quantum chemistry, quantum fluids and plasmas, and solid-state and condensed matter physics. A special feature of the present meeting however was that particular attention was paid in the programme to such topics of current interest in solid-state physics as high-temperature superconductors, heavy fermions, the quantum Hall effect, and disorder. A panel discussion was also organised during the conference, under the chair­ manship of N. W. Ashcroft, to consider the latest developments in the extreme­ ly rapidly growing field of high-T superconductors.
The series of Central European Workshops on Quantum Optics looks back on a successful annual sequence of ten meetings, previously held at locations in Slovakia, Hungary, the Czech Republic, and most recently in Germany. The goal to provide a forum for quantum optics specialists from both Central Europe and elsewhere has always been accompanied by an attempt to provide a small-sized and affordable meeting. Together with the contributions of the participants and the many discussion during the meetings, the special flair of this series of Workshops has become well established. This special issue of Journal of Optics B: Quantum and Semiclassical Optics is devoted to the tenth anniversary Workshop, held during 4–7th April 2003 at Rostock-Warnemünde, Germany, on the coast of the Baltic Sea. It contains selected articles by the participants of the Workshop, who came not only from Central Europe but also from other parts of the world. Their contributions cover a variety of subjects, reflecting the fact that, stimulated by the progress of experimental techniques, quantum optics has become a rapidly growing field of research.