Fluctuation theory in physical measurements

McCombie, Charles

doi:10.1088/0034-4885/16/1/307

Cited by 56 publications

(18 citation statements)

References 78 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…But to derive fundamental limitations on this (classical) effect does not seem to have been a much studied problem. In Barnes and Silverman (1934);McCombie (1953), steps in this direction are taken. But at that time, optimal filtering theory was not as well developed as it is now.…”

Section: Introductionmentioning

confidence: 99%

The Observer Effect in Estimation with Physical Communication Constraints*

Delvenne

2011

IFAC Proceedings Volumes

View full text Add to dashboard Cite

Abstract:In this paper, we derive physical limitations on measurements of linear systems. We show that there is a trade-off between how precise a measurement is and how much we must perturb the measured system. This effect, very different from Heisenberg's inequality, originates in the thermal noise of the communication line between the measured system and the measuring device. This observer effect is shown to be relevant for small systems as found in nanoscience and microbiology.

show abstract

Section: Introductionmentioning

confidence: 99%

The Observer Effect in Estimation with Physical Communication Constraints*

Delvenne

2011

IFAC Proceedings Volumes

View full text Add to dashboard Cite

show abstract

“…McCombie (1953) gives an expression for the smallest possible couple measurement AF occupying a time S at temperature T :…”

Section: Discussionmentioning

confidence: 99%

Differential operators on Lie groups

Neretin¹

1981

Russ. Math. Surv.

View full text Add to dashboard Cite

than 100 ptorr. The low pressure limit, set by photon pressure in radiometer effect gauges, has been extended by the utilization of stmular reflection from the gauge surfaces. An expression has been derived for the deflwtion in absolute terms, and over a pressure range 0 . 4 p,torr to MS Abstract A wide range radiometer effect pressure gauge has been devised which gives a linear deflection with pressure over a theoretical range from 0.1 mtorr to less 0.1 mtorr an ion gauge has been found to give good agreement with the calculated pressure.

show abstract

“…Under these conditions, the limit on the effect of thermal noise can be determined by a Langevin analysis method by applying the principle of equipartition connecting fluctuations and dissipation. The article by M c Combie [22] gives an equation for the thermal noise-induced angular fluctuation of a static pendulum observed for a duration :…”

Section: Thermal Effectmentioning

confidence: 99%

Optical power meter using radiation pressure measurement

Pinot

Silvestri

2019

Measurement

View full text Add to dashboard Cite

This paper describes a radiation pressure meter based on a diamagnetic spring. We take advantage of the diamagnetic property of pyrolytic carbon to make an elementary levitated system. It is equivalent to a torsional spring-mass-damper system consisting of a small pyrolytic carbon disc levitated above a permanent magnet array. There are several possible measurement modes. In this paper, only the angular response to an optical power single-step is described. An optical detection composed of a laser diode, a mirror and a position sensitive detector (PSD) allow measurement of the angular deflection proportional to the voltage delivered by the PSD. Once the parameters of the levitated system depending on its geometrical and physical characteristics have been determined regardless of any optical power, by applying a simple physical law, one can deduce the value of the optical power to be measured from the measurement of the first maximum of the output voltage amplitude.

show abstract

Fluctuation theory in physical measurements

Cited by 56 publications

References 78 publications

The Observer Effect in Estimation with Physical Communication Constraints*

The Observer Effect in Estimation with Physical Communication Constraints*

Differential operators on Lie groups

Optical power meter using radiation pressure measurement

Contact Info

Product

Resources

About