As technology seeks to manipulate and control information and energy in ever-smaller regions of space and ever-shorter periods of time, researchers strive to make quantum theory more operational and to improve connections between theory and laboratory work. In this volume, physicists and mathematicians explore the mathematical apparatus of standard quantum mechanics, focusing on concepts of nonlinearity, nonlocality, computation, and axiomatics. Czachor (Technical U. of Gdansk, Poland), Aerts, and Durt (both Brussels Free U., Belgium) edit 19 chapters including foundations of a realistic operational formalism, high energy approaches to low energy phenomena in astrophysics, and quantum cryptographic encryption in three complementary bases. The book does not include a subject index. Annotation 2003 Book News, Inc., Portland, OR