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  • 1
    Electronic Resource
    Electronic Resource
    Stochastic resonance in a laser with saturable absorber (1995)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 17 (1995), S. 803-810 
    Details
    ISSN: 0392-6737
    Keywords: Nonlinear optics ; Fluctuation phenomena, random processes, and Brownian motion ; Conference proceedings
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary We have investigated, experimentally and theoretically, the occurrence of stochastic resonance (SR) in a laser with saturable absorber: a non-linear optical system presenting optical bistability and self-pulsed regimes for the laser output intensity. In the optical-bistability regime we have obtained an excellent demonstration of SR by studying Fourier spectra and residence time distributions; operating just below the Hopf bifurcation that originates pulsed periodic regime we have obtained experimental evidence of the SR phenomenon. For operation close to the Hopf bifurcation, the theoretical analysis (performed through numerical simulations) has demonstrated that simultaneous presence of noise and periodic forcing generates excursions far from equilibrium; from the locking between these excursions and periodic forcing the SR phenomenon may arise.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02451837
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  • 2
    Electronic Resource
    Electronic Resource
    Stochastic resonance in perspective (1995)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 17 (1995), S. 661-683 
    Details
    ISSN: 0392-6737
    Keywords: General, theoretical, and mathematical biophysics (including logic of biosystems, quantum biology and relevant aspects of thermodynamics, information theory, cybernetics and bionics) ; Fluctuation phenomena, random processes, and Brownian motion ; Probability theory, stochastic processes, and statistics ; Conference proceedings
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary We outline the historical development of stochastic resonance (SR), a phenomenon in which the signal and/or the signal-to-noise ratio in a nonlinear system increase with increasing intensity of noise. We discuss basic theoretical ideas explaining and describing SR, and we review some revealing experimental data that place SR within the wider context of statistical physics. We emphasize the close relationship of SR to some effects that are well known in condensed-matter physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02451825
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  • 3
    Electronic Resource
    Electronic Resource
    Quantum stochastic resonance in the dissipative two-state system (1995)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 17 (1995), S. 959-967 
    Details
    ISSN: 0392-6737
    Keywords: General, theoretical, and mathematical biophysics (including logic of biosystems, quantum biology, and relevant aspects of thermodynamics, information theory, cybernetics, and bionics) ; Quantum statistical mechanics ; Conference proceedings
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary We look for stochastic resonance in the very low temperature limit, where a quantum-mechanical treatment is needed. The canonical example of a dissipative double-well potential subject to periodic forcing is studied within the two-state approximation. The cases of both ohmic and superohmic dissipation are investigated in detail.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02451853
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  • 4
    Electronic Resource
    Electronic Resource
    Quasi-monochromatic noise in bistable systems: The nature of large occasional fluctuations (1995)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 17 (1995), S. 755-764 
    Details
    ISSN: 0392-6737
    Keywords: Chemical kinetics ; Fluctuation phenomena, random processes, and Brownian motion ; Probability theory, stochastic processes, and statistics ; Conference proceedings
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary The response of an overdamped system to quasi-monochromatic (high-frequency narrow band) noise (QMN) has been investigated by means of analogue electronic experiments. Measurements of the stationary and prehistory probability distributions demonstrate that large occasional, fluctuations are markedly different in character from those that occur when the system is driven by white or exponentially correlated noise. In particular, we report the first experimental observation of a switching point, a critical value of the coordinatex that separates regions which, with an overwhelming probability, are accessed by the fluctuating system along topologically different paths. The results are discussed in terms of, and shown to be consistent with, an existing theoretical description of the QMN-driven system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02451832
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