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APS » Journals » Phys. Rev. Lett. » Volume 82 » Issue 23
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Phys. Rev. Lett. 82, 4574–4577 (1999)

Controlling Stochastic Resonance

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Luca Gammaitoni1, Markus Löcher4, Adi Bulsara2, Peter Hänggi3, Joseph Neff4, Kurt Wiesenfeld4, William Ditto4, and Mario E. Inchiosa2
1Dipartimento di Fisica, Universitá di Perugia and Instituto Nazionale di Fisica Nucleare, Sezione di Perugia, I-06100 Perugia, Italy
2Space and Naval Warfare Systems Center San Diego, Code D-364, San Diego, California 92152-5001
3Institut für Physik, Universität Augsburg, Lehrstuhl für Theoretische Physik I, D-86135 Augsburg, Germany
4School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430

Received 22 January 1999; published in the issue dated 7 June 1999

We introduce an open-loop control scheme for stochastic resonators; the scheme permits the enhancement or suppression of the spectral response to threshold-crossing events triggered by a time-periodic signal in background noise. The control is demonstrated in experiments using a Schmitt trigger. A generic two-state theory captures the essential features observed in our experiments and in numerical simulations; this suggests the generality of the effect.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.82.4574
DOI:
10.1103/PhysRevLett.82.4574
PACS:
05.40.Ca, 02.50.Ey, 47.20.Ky, 85.25.Dq
 
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