The Physical Principles of the Quantum Theory
(German: Physikalische Prinzipien der Quantentheorie)
by Nobel laureate (1932) Werner Heisenberg
and subsequently translated by Carl Eckart
and Frank C. Hoyt.
The book was first published in 1930 by University
of Chicago Press.
Then in 1949, according to its copyright page,
Dover Publications reprinted the "unabridged
and unaltered" 1930's version.
The book discusses quantum mechanics and one
1931 review states that this is a "less technical
and less involved account of the theor[y]".
This work has been cited more than 1200 times.In
the book, after briefly discussing various
theories, including quantum theory, Heisenberg
discusses the basis for the fundamental concepts
of quantum theory.
Also by this time Heisenberg has stated, "the
interaction between observer and object causes
uncontrollable and large changes in the [atomic]
system being observed...".
In this work Heisenberg also discusses his
uncertainty principle or uncertainty relations
