Stochastic Processes in Classical and Quantum Systems
Proceedings of the 1st Ascona-Como International Conference, Held in Ascona, Ticino (Switzerland), June 24–29, 1985
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Quantum chaos, decoherence and quantum computation
Quantum chaos [1,2] has faced over the years problems of increasing complexity, from simple toy models like the kicked rotator to single-particle physics (hydrogen atoms in strong magnetic and/or microwave fie...
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Article
Medical treatment for nocardial brain abscesses
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Gamma-ray tracking with the MARS detector
The feasibility of the entire process of \(\gamma\) -ray tracking is demonstrated experimentally for the first time. The...
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Article
Statistical properties of eigenvalues for an operating quantum computer with static imperfections
We investigate the transition to quantum chaos, induced by static imperfections, for an operating quantum computer that simulates efficiently a dynamical quantum system, the sawtooth map. For the different dyn...
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Eigenstates of an operating quantum computer: hypersensitivity to static imperfections
We study the properties of eigenstates of an operating quantum computer which simulates the dynamical evolution in the regime of quantum chaos. Even if the quantum algorithm is polynomial in number of qubits nq, ...
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Emergence of Fermi-Dirac thermalization in the quantum computer core
We model an isolated quantum computer as a two-dimensional lattice of qubits (spin halves) with fluctuations in individual qubit energies and residual short-range inter-qubit couplings. In the limit when fluct...
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Article
Chaotic enhancement in microwave ionization of Rydberg atoms
The microwave ionization of internally chaotic Rydberg atoms is studied analytically and numerically. The internal chaos is induced by magnetic or static electric fields. This leads to a chaotic enhancement of...
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Lack of effect of hexarelin on TRH-induced TSH response in normal adult man
The mechanism of action of the synthetic growth hormone (GH)releasing peptide hexarelin is not yet fully understood. Although a direct effect on pituitary cells has been demonstrated, the peptide is also activ...
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Circulating levels of growth hormone, insulin-like growth factor-I and prolactin in normal, growth retarded and anencephalic human fetuses
We measured growth hormone (GH), insulin-like growth factor-I (IGF-I), and both total and glycosylated prolactin (PRL) levels in 131 blood samples obtained by cordocentesis in normal and abnormal fetuses from ...
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Localization, fluctuations and stabilization of the hydrogen atom in monochromatic fields: The magic mountain
We study the excitation and ionization properties of a hydrogen atom under a microwave field and provide theoretical and experimental evidence for the quantum photonic localization. We also discuss the interes...
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Chapter
Quantum Chaos, Fractal Spectra and Atomic Stabilization
The modifications that quantum mechanics imposes on the general picture of classical chaos is a subject of growing interest for its theoretical relevance and for different physical applications as well. As a m...
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Chapter and Conference Paper
Theory of Chaos in the Atomic Hydrogen
Investigations on the possibility of quantum chaotic behaviour have now grown into an autonomous field of research, usually referred to as ‘Quantum Chaos’ /1,2/. Arguments under current investigation range fro...
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Chapter and Conference Paper
Relevance of Classical Chaos in Quantum Mechanics
The study of deterministic chaos in classical mechanics has by now grown into a popular area of research. However, its implications at the microscopic level, in the domain of quantum mechanics, only recently a...
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Book and Conference Proceedings
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Chapter and Conference Paper
Chaotic and Cooperative Effects in a Free-Electron Laser Hamiltonian Model
In this paper we study the coherent interaction among a system of N electrons and two fields of the same frequency, namely a radiation field copropagating with the particles and a classical pump field which is...
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Article
Theory I
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Chapter and Conference Paper
Cooperative and Chaotic Effects in a Hamiltonian Model of the Free-Electron Laser
The basic principles of the laser are common knowledge by this time [1]. Furthermore, the laser has raised to a paradigm for synergetics [2],which provides the fertile framework for a unitary description of co...
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Chapter and Conference Paper
Chaos in Quantum Mechanics
The understanding of the qualitative features of the motion of classical dynamical systems has greatly improved in the last years due to the discovery of the so-called “stochastic motion” The latter means that...
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On the connection between quantization of nonintegrable systems and statistical theory of spectra
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On the lattice thermal conduction in a harmonic system
The thermal properties of a harmonic chain in a stationary nonequilibrium state are examined. It is shown that an appropriate mathematical schematization of the heat reservoirs removes the unphysical results p...
