Towards Measurement of the Standard Quantum Limit » książka
Towards Measurement of the Standard Quantum Limit
ISBN-13: 9783639134124 / Angielski / Miękka / 2009 / 124 str.
This thesis is based on the study of a low-loss electrical and acoustical resonator, which has been developed for use as a novel transducer in attempted measurements of quantum mechanical effects in a macroscopic mass. The method of transductance is via the interaction between the electrical and mechanical resonances within a monolithic sapphire mono-crystal supported by a low-loss suspension system. Exploiting parametric back-action effects has allowed determination of the dependence of permittivity on strain in sapphire. This new technique yields results that are in agreement with existing reports assuming sapphire is isotropic. Further, this first-time measurement gives additional information showing that the dependence of permittivity on strain in sapphire is anisotropic. Although the sensitivity of the system is still orders of magnitude away from the quantum mechanical regime, this work serves as important foundations for further research.
This thesis is based on the study of a low-losselectrical and acoustical resonator, which has beendeveloped for use as a novel transducer in attemptedmeasurements of quantum mechanical effects in amacroscopic mass. The method of transductance is viathe interaction between the electrical and mechanicalresonances within a monolithic sapphire mono-crystalsupported by a low-loss suspension system. Exploiting parametric back-action effects has alloweddetermination of the dependence of permittivity onstrain in sapphire. This new technique yields resultsthat are in agreement with existing reports assumingsapphire is isotropic. Further, this first-timemeasurement gives additional information showing thatthe dependence of permittivity on strain in sapphireis anisotropic.Although the sensitivity of the system is stillorders of magnitude away from the quantum mechanicalregime, this work serves as important foundations forfurther research.
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