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Quantum theory of fluctuations in a cold damped accelerometer |
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| Authors: | F. Grassia J. -M. Courty S. Reynaud P. Touboul |
| Affiliation: | (1) Laboratoire Kastler Brossel (Laboratoire de l'Université Pierre et Marie Curie, de l'école Normale Supérieure et du Centre National de la Recherche Scientifique.), UPMC case 74, 4 place Jussieu, 75252 Paris Cedex 05, France, FR;(2) Département de Mesures Physiques, ONERA, 29 avenue de la division Leclerc, B.P. 72, 92322 Chatillon Cedex, France, FR |
| Abstract: | We present a quantum network approach to real high sensitivity measurements. Thermal and quantum fluctuations due to active as well as passive elements are taken into account. The method is applied to the analysis of the capacitive accelerometer using the cold damping technique, developed for fundamental physics in space by ONERA and the ultimate limits of this instrument are discussed. It is confirmed in this quantum analysis that the cold damping technique allows one to control efficiently the test mass motion without degrading the noise level. Received 20 April 1999 and Received in final form 2 July 1999 |
| Keywords: | PACS. 42.50.Lc Quantum fluctuations quantum noise and quantum jumps - 04.80.Cc Experimental tests of gravitational theories - 07.50.-e Electrical and electronic components instruments and techniques |
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