Practical applications of quantum mechanics

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Discussion Overview

The discussion revolves around the practical applications of quantum mechanics, particularly in optimizing technology and devices that impact daily life. Participants explore various aspects of quantum mechanics as it relates to solid-state devices and electronic components.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant inquires about the practical applications of quantum mechanics in enhancing human existence.
  • Another participant mentions diodes as a key application of quantum mechanics.
  • A further elaboration highlights that all solid-state devices, including diodes, transistors, and integrated circuits, rely on quantum mechanics, suggesting that modern electronics would not exist without it.
  • There is a claim that the concept of holes in solid-state physics, often simplified in textbooks, is misunderstood and requires a quantum mechanical framework to be accurately described.
  • A participant expresses frustration over the inaccuracies in popularizations and beginner textbooks regarding quantum mechanics and quantum field theory, indicating that misconceptions are widespread even among educators.
  • Links to external resources on density functional theory and a Nobel Prize in Chemistry are provided, suggesting further reading on related topics.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the accuracy of popular explanations of quantum mechanics, with some expressing strong disagreement about the representations found in educational materials. The discussion remains unresolved regarding the extent of these inaccuracies and their implications.

Contextual Notes

The discussion highlights limitations in popular and educational resources regarding quantum mechanics, particularly concerning the conceptual understanding of solid-state physics and the nature of particles and quasi-particles.

Jazzy Smaff
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What are some of the practical applications of quantum mechanics that are being utilized to optimize our existence as a species?
 
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Diodes.
 
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Jilang said:
Diodes.

All solid-state devices, diodes, transistors, integrated circuits, computers - just about anything electronic in modern times requires QM to work. Our modern world would not exist without it.

Solid state devices work by an interaction of electrons and so called holes. Holes at the intuitive level can be thought of as the absence of electrons, and you will find many textbooks explaining how such work using that idea. It's wrong - that holes exist and act like particles (called quasi particles) requires QM.

You will find many things in popularization's and beginner textbooks, especially in things related to QM are wrong, and becomes much much worse when you move onto so called Quantum Field theory. Its so bad in QFT we have professors on this site that teach this stuff that people don't believe when they are told its wrong - it really is that bad. They believe the popularization's - its quite maddening really so its wise to be aware of it early on.

Thanks
Bill
 
Last edited:

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