Quantum 1/f and Classical Phase Noise in Resonant Bio-Chemical MEMS Sensors

Peter H. Handel, Adam G. Tournier

Abstract:	While classical physics provides no universal 1/f spectrum, quantum mechanics and electrodynamics require the presence of fundamental quantum fluctuations of physical currents, cross sections, and process rates, because of the infrared quasidivergence and radiative corrections. The present paper calculates these quantum fluctuations, shows that they have a simple universal 1/f spectrum, and shows how they invariably come to the foreground, being dominant at low frequencies in high-technology applications. This happens because in them all other fluctuations and sources of instability have been either eliminated, or otherwise discounted and put under control. BAW, SAW and MEMS resonators are no exception. This defines detection limits and optimization rules for biological and chemical sensors based on them.
Published in:	Proceedings of the 37th Annual Precise Time and Time Interval Systems and Applications Meeting August 29 - 31, 2005 Vancouver, Canada
Pages:	193 - 201
Cite this article:	Handel, Peter H., Tournier, Adam G., "Quantum 1/f and Classical Phase Noise in Resonant Bio-Chemical MEMS Sensors," Proceedings of the 37th Annual Precise Time and Time Interval Systems and Applications Meeting, Vancouver, Canada, August 2005, pp. 193-201.
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