Different 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.
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. |
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 |