Showing papers on "Coherent information published in 1980"
TL;DR: In this article, it was shown that the expectation value of the quantum Hamiltonian in any coherent state equals the energy of the classical field at which the state is peaked, and that this property can be used to characterize the usual Fock representation.
Abstract: In the usual Fock quantisation of fields in Minkowski space-time, one has the result that the expectation value of the quantum Hamiltonian in any coherent state equals the energy of the classical field at which the state is peaked. It is shown that this property can be used tocharacterise the usual Fock representation. It is also pointed out that the entire analysis goes through for a substantially more general class of systems including, in particular, Bose fields in arbitrary stationary space-times.
30 citations
TL;DR: The theory shows that impulsory energy supply is bound to negative entropy inflow which brakes the normal entropy ‘production’ in the ‘dissipative’ structures of the considered system, allowing the introduction of information into concrete thermodynamic systems analysis.
Abstract: Aiming to provide a common theoretical foundation for all known biblio‐metric laws, the author starts from a systemic view of the information transfer process and assimilates it with a physical diffusion process, in particular the conduction of heat in solids. Previous literature induces in the properly ranked space of new authors an interest potential (temperature) confirmed by exchange of reference‐citation pairs, and driving a controlled information flow. The model gives its distribution for given initial and borderline conditions, allowing at the same time the establishment of new definitions for informational energy and entropy, which are coherent with the corresponding physical ones. The theory shows that impulsory energy supply is bound to negative entropy inflow which brakes the normal entropy ‘production’ in the ‘dissipative’ structures of the considered system. In this way the introduction of information into concrete thermodynamic systems analysis can hopefully be expected.
13 citations
TL;DR: In this paper, the authors examined the existence of longitudinal limitations of measurability, defined as limitations preventing the measurement of a given quantity with arbitrarily high accuracy, and they considered a measuring device as a generalized communication system.
Abstract: We examine the problem of the existence (in classical and/or quantum physics) of longitudinal limitations of measurability, defined as limitations preventing the measurement of a given quantity with arbitrarily high accuracy. We consider a measuring device as a generalized communication system, which enables us to use methods of information theory. As a direct consequence of the Shannon theorem on channel capacity, we obtain an inequality which limits the accuracy of a measurement in terms of the average power necessary to transmit the information content of the measurement itself. This inequality holds in a classical as well as in a quantum framework.