An Introduction to Logical Operations on Classical and Quantum Bits
  This article is a short review on the concept of information. We show the strong relation between Information Theory and Physics, and the differences between classical and quantum information, with emphasis in their manipulation through logical gates. This paper is intended to be read by non-specialists and undergraduate students of Computer Science, Mathematics and Physics, with knowledge in Linear Algebra and Quantum Mechanics. 
F.L. Marquezino and R.R. Mello Junior