Abstract
A generalization of the description of a quantum system in the time interval between two measurements is presented. A new concept of a generalized state is introduced. Generalized states yield a complete description of a quantum system when information about the system is available both from the past and from the future. The formalism of generalized states provides a natural language for describing many peculiar situations. In particular, situations in which one can ascertain the result of a measurement of any one of several non-commuting variables are analysed. 'Weak' measurements on quantum systems described by generalized states are discussed. The relation between 'weak' and 'strong' measurements is investigated.
| Original language | English |
|---|---|
| Article number | 018 |
| Pages (from-to) | 2315-2328 |
| Number of pages | 14 |
| Journal | Journal of Physics A: Mathematical and General |
| Volume | 24 |
| Issue number | 10 |
| DOIs | |
| State | Published - 1991 |
| Externally published | Yes |