  There is a huge number of excellent and comprehensive textbooks on quantum
mechanics. They mainly differ for the approach, more or less oriented to the
formalism rather than to the phenomenology, as well as for the topics covered.
These lectures have been based mainly on the classical textbook by Gasiorowicz
(1974). I must confess that the main reason for my choice of Gasiorowicz (1974)
is affective, as it was the textbook where I first learned the basic principles
of quantum mechanics. Beyond my personal taste, I now recognize that
Gasiorowicz (1974) is still a very good textbook on quantum mechanics, with a
rigorous theoretical approach accompanied by a wide collection of applications.
If the textbook by Gasiorowicz was my main basis, I have taken much also from
other textbooks such as Phillips (2003), as well as from the excellent
classical textbook by Dirac (1981). In order to avoid complications in the
mathematics and in the notation, the topic is presented in these notes with
reference to one-dimensional systems, with just a few marginal extensions to
the three-dimensional formulation.
