Gravitational waves and the stability threshold of oscillator frequency

Details Gravitational waves and the stability threshold of oscillator frequency Gravitational waves and the stability threshold of oscillator frequency

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978zhetf..74..828b&link_type=abstract

Zhurnal Eksperimental'noi i Teoreticheskoi Fiziki, vol. 74, Mar. 1978, p. 828-832. In Russian.

Astronomy and Astrophysics

Astrophysics

7

Black Holes (Astronomy), Frequency Stability, Galactic Nuclei, Gravitational Waves, Self Oscillation, Squid (Detectors), Astrophysics, Autodynes, Cryogenic Equipment, Microwave Oscillators, Temperature Control

Scientific paper

Detection of gravitational radiation burst accompanying the collapse of galactic nuclei and the formation of black holes during the pregalactic period of the universe requires a free-running generator of electromagnetic fluctuations with a relative frequency instability of less than 1 by 10 to the -18th. In the present paper, an analysis of the instability threshold of the natural oscillation frequency of a superconductor-coated dielectric cavity shows that instability can be reduced by coupling the oscillator to a high-Q cavity thermally stabilized for temperatures below 4 K. Making allowance for thermodynamic temperature fluctuations of the cavity, the thermal shot effect, the ponderomotive shot effect, and the purely quantum oscillations, an expression is derived for the lowest frequency instability at optimal power. Numerical estimates point toward the possibility of obtaining a relative instability level as low as 1 by 10 to the -20th.

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