How to fire one electron at a time

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Discussion Overview

The discussion revolves around the methods for firing one electron at a time, exploring the feasibility and techniques for achieving such precision in electron emission. Participants consider both theoretical and practical aspects of this concept.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant inquires about the possibility of building a device that can emit single electrons, expressing confusion over existing explanations like the double slit experiment.
  • Another participant suggests reducing the intensity of an electron-emitting device to achieve a low emission rate, proposing that a filament emitting 10^6 electrons/second could be adjusted to emit 1 electron/second by lowering its temperature.
  • A third participant mentions the concept of a Poisson Distribution as a method to describe the reduced intensity of electron emission.
  • Another idea presented involves using a photoelectric element pulsed by a light-emitting diode, indicating a different approach to achieve single electron emission.
  • One participant draws an analogy between reducing filament power and the challenge of isolating a single molecule of steam from water, suggesting potential difficulties in the process.

Areas of Agreement / Disagreement

Participants present multiple approaches and ideas without reaching a consensus on the best method for firing one electron at a time. Various techniques are proposed, indicating a range of opinions and uncertainty about the most effective solution.

Contextual Notes

Some assumptions about the efficiency and effectiveness of the proposed methods remain unaddressed, and the discussion does not resolve the practical challenges involved in achieving single electron emission.

Four
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How? I've been looking but the only thing I get is the double slit experiment.

How do you build a device that shoots one electron at a time? I know how to build a device that shoots a whole stream of electrons. But 1 at a time! How is it possible to get to such high granularity?
 
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You just take your device that shoots a stream of electrons and reduce the intensity of the stream so that the electrons are far apart. For example, if I have a filament that is emitting 10^6 electrons/second, I can reduce the temperature of the filament, and the rate of electron emission will be reduced. Suppose the size of my apparatus and the speed of my electrons is such that it takes 1 millisecond to travel from the filament to the detector. If I reduce the rate of electron emission to 1 electron/second, then the vast majority of the time there will be only one electron at a time present in my apparatus.
 
As was said, basically reduce your intensity until you've got something like a Poisson Distribution.
 
How about a photoelectric element pulsed with a narrow-width pulse from a light emitting diode. Just the first thing that came to mind.

Turning down the power to a filament makes me picture trying to get one molecule of steam off of a warm container of water.

DC
 

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