Statistical mechanics relies on the complete though probabilistic description of a system in terms of all the microscopic variables. Its object is to derive therefrom static and dynamic propertiesâ€¦ (More)

We review with a tutorial scope the information theory foundations of quantum statistical physics. Only a small proportion of the variables that characterize a system at the microscopic scale can beâ€¦ (More)

Denoting by q (i = 1, ..., n) the set of extensive variables which characterize the state of a thermodynamic system, we write the associated intensive variables Î³i, the partial derivatives of theâ€¦ (More)

â€“ A Hamiltonian model is solved, which satisfies all requirements for a realistic ideal quantum measurement. The system S is a spin1 2 , whose z-component is measured through coupling with anâ€¦ (More)

The unknown state rho of a quantum system S is determined by letting it interact with an auxiliary system A, the initial state of which is known. A one-to-one mapping can thus be realized between theâ€¦ (More)

Thomsonâ€™s formulation of the second law no work can be extra cted from a system coupled to a bath through a cyclic process is believed to be a fundamental principle of nature. For the equilibriumâ€¦ (More)

The von Neumann entropy S(DÌ‚) generates in the space of quantum density matrices DÌ‚ the Riemannian metric ds = âˆ’dS(DÌ‚), which is physically founded and which characterises the amount of quantumâ€¦ (More)

The measurement of a spin1 2 is modeled by coupling it to an apparatus, that consists of an Ising magnetic dot coupled to a phonon bath. Features of quantum measurements are derived from theâ€¦ (More)

A variational expression is constructed for generating functions in many-body theory, equilibrium and non-equilibrium statistical mechanics or eld theory. Thermodynamic potentials, expectation valuesâ€¦ (More)