Understanding Coherence in Quantum Mechanics

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Discussion Overview

The discussion centers on the physical meaning of coherence in quantum mechanics, exploring its implications and interpretations. Participants seek to clarify the concept, particularly in relation to interference patterns and coherent states.

Discussion Character

  • Exploratory, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant asks for an explanation of the physical meaning of coherence in quantum mechanics.
  • Another participant suggests that coherence is related to the ability of beams of particles to show interference patterns when they overlap with different offsets.
  • A third participant directs others to a Wikipedia article on coherent states for further reading and encourages questions about any remaining uncertainties.
  • It is noted that the term "coherent state" has both a narrow and a broad meaning, as indicated by different contributors.

Areas of Agreement / Disagreement

The discussion does not reach a consensus on the definition of coherence, as different interpretations and meanings are presented, indicating multiple competing views.

Contextual Notes

There are unresolved aspects regarding the definitions of coherence and coherent states, as well as the implications of interference patterns, which depend on specific contexts and interpretations.

Sheldon Cooper
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Hi,

Can anyone please explain the physical meaning of coherence(Quantum Mechanics).

Thanks is advance
 
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Physical meaning of coherence would be that beams of particles (or two parts of the same beam) are coherent if they show interference pattern when they overlap with different offsets.
 
A term "coherent state" has two different meanings: a narrow one meant by A. Neumaier and a broad one meant by zonde.
 
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