caa a22 4500 445858699 CHVBK 20180317145436.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s10946-011-9217-z doi (NATIONALLICENCE)springer-10.1007/s10946-011-9217-z Mizrahi Salomon Departamento de Física, Universidade Federal de São Carlos, Rod. Washington Luis km 235, 13565-905, São Carlos, SP, Brazil aut Bits, time, carriers, and matter [Elektronische Daten] [Salomon Mizrahi] The formal structure of quantum information theory is based on the well-founded concepts and postulates of quantum mechanics. In the present contribution, I am inverting the usual approach presented in textbooks by beginning with the use of bit states as basic and fundamental units of information and establish a dynamical map for them. The condition of reversibility, imposed on an ordered sequence of actions operating on a bit state, introduces, by necessity, the unitarity property of actions. I also verify that the uniformity of time, as a parameter for ordering events, is due to the admission of a composition law for the actions. In the limit of infinitesimal intervals between actions, a reversible and linear equation arises for the dynamical changes in time of a qubit (superposition of bit states). The admission that a bit of information is stored or carried by a massive particle necessarily leads to the Schrödinger-Pauli equation (SPE); the bit is associated to a spin 1/2. Within this approach, I verify that the particle dynamical equation becomes "enslaved” by the spin dynamics. In other words, the bit (or spin) precedes in status the particle dynamical evolution, being at the root of the quantum character of the standard Schr¨odinger equation, even when spin and spatial degrees of freedom are uncoupled. Springer Science+Business Media, Inc., 2011 bits nationallicence qubits nationallicence time nationallicence information nationallicence evolution equation nationallicence qubit carrier nationallicence Journal of Russian Laser Research Springer US; http://www.springer-ny.com 32/4(2011-07-01), 301-310 1071-2836 32:4<301 2011 32 10946 https://doi.org/10.1007/s10946-011-9217-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10946-011-9217-z text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Mizrahi Salomon Departamento de Física, Universidade Federal de São Carlos, Rod. Washington Luis km 235, 13565-905, São Carlos, SP, Brazil aut NATIONALLICENCE 773 0- Journal of Russian Laser Research Springer US; http://www.springer-ny.com 32/4(2011-07-01), 301-310 1071-2836 32:4<301 2011 32 10946 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer