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EnglishDifferent theoretical estimates of the sensitivity of gravitational wave resonant bar-detectors, which have been published in the last decades, are reviewed and discussed. The "classical" cross-section estimate is obtained considering the bar as a classical or quantum oscillator, whose initial thermal state is that of a single oscillator driven by a single external stochastic force. Other theoretical studies computed a much larger cross-section, using a variety of quantum-mechanical arguments. The review of the existing literature shows that there is no well established model for the response of a resonant detector to gravitational waves. The resonant, yet random, nature of the Brownian thermal motion may justify considering the bar response at the fundamental longitudinal eigenfrequency as that of a large number of effective quantum mechanical oscillators. Assuming this hypothesis, quantum coherence effects, as first suggested by Weber, lead to a much larger cross-section than that "classically" predicted. The reduction of this amplification due to thermal noise itself is also computed.
Sisto, R., & Moleti, A. (2004). On the sensitivity of gravitational wave resonant bar detectors. INTERNATIONAL JOURNAL OF MODERN PHYSICS D, 13(4), 625-639 [10.1142/S021827180400475X].
| Tipologia: | Articolo su rivista | |
| Citazione: | Sisto, R., & Moleti, A. (2004). On the sensitivity of gravitational wave resonant bar detectors. INTERNATIONAL JOURNAL OF MODERN PHYSICS D, 13(4), 625-639 [10.1142/S021827180400475X]. | |
| IF: | Con Impact Factor ISI | |
| Lingua: | English | |
| Settore Scientifico Disciplinare: | Settore FIS/01 - Fisica Sperimentale | |
| Revisione (peer review): | Sì, ma tipo non specificato | |
| Tipo: | Articolo | |
| Rilevanza: | Rilevanza internazionale | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1142/S021827180400475X | |
| Stato di pubblicazione: | Pubblicato | |
| Data di pubblicazione: | 2004 | |
| Titolo: | On the sensitivity of gravitational wave resonant bar detectors | |
| Autori: | ||
| Autori: | Sisto, R; Moleti, A | |
| Appare nelle tipologie: | 01 - Articolo su rivista |
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http://hdl.handle.net/2108/30861
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