Quantum nondemolition measurements of harmonic oscillators

Details Quantum nondemolition measurements of harmonic oscillators Quantum nondemolition measurements of harmonic oscillators

Mar 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978phrvl..40..667t&link_type=abstract

Physical Review Letters, vol. 40, Mar. 13, 1978, p. 667-671.

Physics

79

Harmonic Oscillators, Quantum Theory, Vibration Measurement, Amplitudes, Gravitational Wave Antennas, Heisenberg Theory, Lc Circuits, Measuring Instruments

Scientific paper

Measuring systems to determine the real component of the complex amplitude of a harmonic oscillator are described. This amplitude is constant in the absence of driving forces, and the uncertainty principle accounts for the fact that only the real component can be measured precisely and continuously ('quantum nondemolition measurement'). Application of the measuring systems to the detection of gravitational waves is considered.

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