PROGRESS IN QUANTUM ELECTRONICS An International Review Journal Volume 16 Executive Editor P. T. LANDSBERG Editors P. L. GOULD W. KAISER M. JANOSSY © PERGAMON PRESS OXFORD - NEW YORK - SEOUL : TOKYO Executive Editor: Professor P. T. Landsberg, Faculty of Mathematical Studies, University of Southampton, Highfield, SOUTHAMPTON, SO9 5NH, U.K. North American Editor: Professor M. Osifiski, Center for High Technology Materials, University of New Mexico, ALBUQUERQUE, NM 87131-6081, U.S.A. Authors are invited to submit papers to the editors for approval © 1994 Elsevier Science Ltd Subscription Rates 1994 Annual Institutional Subscription Rates 1994: North, Central and South America, U.S.$395.00, Rest of World £255.00. Associated Personal Subscription Rates are available on request for those whose institutions are library subscribers. Sterling prices exclude VAT. Non-VAT registered customers in the European Community will be charged the appropriate VAT in addition to the price listed. Prices include postage and insurance and are subject to change without notice. Single back volumes and parts are available. Subscription and advertising enquiries from customers in North America should be sent to: Elsevier Science Inc., 660 White Plains Road, Tarrytown, NY 10591-5153, U.S.A. and for the rest of the world to: Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, U.K. Back Issues Back issues of all previously published volumes are available direct from Elsevier Science offices. Published as five issues per annum: January, April, July, October, December. At the end of the volume the Subscriber will receive, free, both the annual author and subject indexes. Second class postage paid at RAHWAY NJ. Postmaster send address corrections to Progress in Quantum Electronics, c/o Elsevier Science Inc., 660 White Plains Road, Tarrytown, NY 10591-5153, U.S.A. CONTENTS Theoretical Methods in Quantum Optics: S-Matrix and Keldysh Techniques for Strong-Field Processes H. R. REISS A New Theoretical Approach for the Quantum Well Semiconductor Laser G. W. TAYLOR QED of Resonators in Quantum Optics L. KNOLL and D.-G. WELSCH The Use of Quantum Mechanics in the Treatment of Waveguides N. MARINESCU Book Review Quantum Magnetotransport in Lateral Surface Superlattices D. K. FERRY Author Index Subject Index Contents of Previous Volumes