PROCESSING AND TRANSMISSION OF IMPORTATION QUARTERLY PROGRESS REPORT

摘要

A popular theory of measurement of qualm systems says that if we describe states of a quantum system S as elements in a Hilbert space S then any measurement can be characterized by a Hermitical operator in Hilbert space S. This notion of quantum measurement is too restricted, and we shall consider measurements characterized by Hermitical operators in extended Hilbert spaces that include the original space 3Cg. One possible way of implementing such measurement is to let an apparatus A interact with the system S and then perform subsequent measurement on the combined system S+A. Therefore we want to know what types oi interaction are feasible and, in particular, to find restrictions on possible types of interaction when we invoke some form of conservation law. We know that we can characterize interactions between two quantum sys terns by specifying 1,2 the interaction Hamiltonian H. In this report we discuss the restriction of the law of conservation of energy on the allowable form of H.