INFORMATION-THEORETICAL PROPERTIES OF A SEQUENCE OF QUANTUM-NONDEMOLITION MEASUREMENTS

Authors
BAN M
Citation
M. Ban, INFORMATION-THEORETICAL PROPERTIES OF A SEQUENCE OF QUANTUM-NONDEMOLITION MEASUREMENTS, Physics letters. A, 249(3), 1998, pp. 167-179
Citations number
21
Categorie Soggetti
Physics
Journal title
Physics letters. A → ACNP
ISSN journal
03759601
Volume
249
Issue
3
Year of publication
1998
Pages
167 - 179
Database
ISI
SICI code
0375-9601(1998)249:3<167:IPOASO>2.0.ZU;2-W
Abstract
The information-theoretical properties of a sequence of quantum nondem olition measurements are investigated in detail. It is found that the information gain by quantum nondemolition measurement is equal to the entropy decrease of the measured physical system. Under certain condit ions, the complete information about a discrete observable of the phys ical system can be obtained when a sufficiently large number of measur ements are performed. (C) 1998 Elsevier Science B.V.