Particle-Wave Duality Contention

  • Context: Graduate 
  • Thread starter Thread starter cbd1
  • Start date Start date
  • Tags Tags
    Duality
Click For Summary

Discussion Overview

The discussion revolves around the concept of particle-wave duality in quantum mechanics, specifically addressing whether electrons exist as particles orbiting the nucleus of an atom or if they are better described by a wavefunction representing probabilities of their locations. The scope includes theoretical interpretations of quantum mechanics, the nature of particles and waves, and implications for understanding fermions and bosons.

Discussion Character

  • Debate/contested
  • Conceptual clarification
  • Exploratory

Main Points Raised

  • Some participants propose that electrons do not exist as particles in a definite location until observed, suggesting that quantum mechanics offers an interpretation that challenges classical notions of particles.
  • Others argue that the duality of particles and waves is a conceptual framework that does not reflect a true dichotomy in nature, emphasizing that both descriptions can yield the same predictions mathematically.
  • A participant describes quantum objects as neither strictly particles nor waves, noting that their behavior can vary based on experimental conditions.
  • Another viewpoint contends that while waves cannot possess mass or weight, the wave-like properties of fermions in quantum experiments do not negate their existence as particles at all times.
  • Some participants challenge the assertion that waves cannot possess momentum, arguing that in quantum mechanics, waves can have well-defined momentum.
  • Discussion includes the idea that classical fields and particles share similarities in terms of energy and momentum, with quantum fields unifying these concepts.

Areas of Agreement / Disagreement

Participants express differing views on the nature of electrons and the validity of wave-particle duality. There is no consensus on whether electrons can be considered to orbit the nucleus as particles or if they are better described by their wavefunctions. The discussion remains unresolved with multiple competing interpretations.

Contextual Notes

Participants highlight limitations in understanding due to classical intuitions conflicting with quantum mechanics, and there are unresolved questions regarding the implications of wavefunctions and the nature of observation in quantum theory.

  • #31
cbd1 said:
I agree that the energy in photons has a mass equivalence, which will curve space. But, there is no evidence that photons are accelerated by gravity. A photon shot directly away from a gravitational field will never lose velocity due gravitational acceleration. If it were a particle with rest mass, like an electron, it would; but it is not. This shows that a wave does not have weight.

Photons can't 'accelerate' because they are moving at c
But they can change direction and they can jain or lose energy because of the gravitagtion.
For example, photon falling down in Earth gravitation field gain energy (confirmed experimentally!)
 
Physics news on Phys.org
  • #32
cbd1 said:
Why then do we not get an interference pattern when the slits are observed? There are different results to the two-slit experiment if we observe the slits and if we do not observe the slits. This seems to me direct evidence that quantum objects behave differently depending on if they are observed or not.

Because to 'observe' means 'to interact'.
If you do 2 slit experiment, say, with electrons, you can use, for example, light (photons) o detect which slit electorn used. So you actually hit/disturb electorns.

So there is absolutely no 'enigma': like in classical physics you don't find strange that billiard balls move straight, but if you 'observe' them using another billiard balls, hitting them, they change the direction.
 
  • #33
As I said, two crashing cars behave differently than two non-crashing cars; but in both cases the same physical laws apply. If you change the experiment (location detection vs. interference w/o location detection) the results change as well.
 

Similar threads

  • · Replies 36 ·
2
Replies
36
Views
8K
  • · Replies 38 ·
2
Replies
38
Views
5K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 3 ·
Replies
3
Views
5K
  • · Replies 11 ·
Replies
11
Views
3K
  • · Replies 17 ·
Replies
17
Views
3K
  • · Replies 5 ·
Replies
5
Views
1K
  • · Replies 10 ·
Replies
10
Views
4K
  • · Replies 39 ·
2
Replies
39
Views
9K
  • · Replies 24 ·
Replies
24
Views
3K