Double Slit Experiment: Particles, Interference & Measurement

Click For Summary
SUMMARY

The discussion centers on the Double Slit Experiment, specifically how a single photon interferes with itself and the impact of measurement on the interference pattern. It is established that measuring a photon's position collapses its wave function, localizing it at one slit and preventing self-interference. The conversation also touches on the potential for advanced measurement techniques that may not disrupt the interference pattern, challenging the Copenhagen Interpretation of quantum mechanics.

PREREQUISITES
  • Understanding of quantum mechanics principles
  • Familiarity with wave-particle duality
  • Knowledge of the Copenhagen Interpretation
  • Basic concepts of wave function collapse
NEXT STEPS
  • Research advanced measurement techniques in quantum mechanics
  • Explore alternative interpretations of quantum mechanics beyond the Copenhagen Interpretation
  • Study the mathematical framework of wave function collapse
  • Investigate experimental setups for the Double Slit Experiment
USEFUL FOR

Students of physics, quantum mechanics enthusiasts, researchers exploring wave-particle duality, and anyone interested in the implications of measurement in quantum experiments.

Strafespar
Messages
47
Reaction score
0
The first question is, how does a single particle(say a photon) interfere with itself? Next, how does measuring it interfere with the interfering pattern? Need help on those please! Thanks!
 
Physics news on Phys.org
It has a wave property associated with it which causes the interference.

Measuring its position causes the wave to collapse to another wave localised at one of the slits and thus the wave can no longer interfere with itself (since it doesn't travel through both slits)

It may be possible to construct sufficiently delicate measurement techniques so as not to destroy the interference. The Copenhagen Interpretation says this is not possible but I'm not so sure it isn't.
 

Similar threads

Undergrad Which-Path from Global Momentum Measurement in Double Slit
  • · Replies 3 ·
Replies
3
Views
1K
Undergrad Single vs. Double slit coherence clarification please
  • · Replies 10 ·
Replies
10
Views
2K
Undergrad Double-dark Slit Interference Pattern?
  • · Replies 15 ·
Replies
15
Views
2K
Undergrad Why is there no single slit interference when one slit is closed in a double slit experiment?
  • · Replies 55 ·
2
Replies
55
Views
6K
Undergrad Does a qubit break interference in the double slit experiment?
  • · Replies 10 ·
Replies
10
Views
2K
High School Double-slit with movable detector screen
  • · Replies 15 ·
Replies
15
Views
1K
High School Yet another double slit thought experiment...
  • · Replies 20 ·
Replies
20
Views
2K
High School What is causing destructive interference in double slit experiment?
  • · Replies 32 ·
2
Replies
32
Views
5K
High School Q - Double slit experiment, delayed slit selection observation
  • · Replies 5 ·
Replies
5
Views
2K
Undergrad "Wave-particle duality" and double-slit experiment
  • · Replies 36 ·
2
Replies
36
Views
9K