Do properties associated with photons also apply to other bosons?

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Discussion Overview

The discussion centers on whether properties associated with photons, such as energy-frequency correlation and interference, also apply to other bosons, particularly the Higgs boson. Participants explore the implications of charge and mass on these properties, considering both theoretical and conceptual aspects.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants note that a frequency can be ascribed to any particle, not just photons, and that any particle may interfere with itself.
  • It is proposed that the peculiar behavior of photons, such as the ability to have superpositions of states with different numbers of particles, is due to their lack of charge, which allows fields to become observables.
  • Others argue that while Higgs bosons are also uncharged, their mass may influence their behavior differently compared to massless photons.
  • A participant questions why certain particles, like W+ bosons or electrons, cannot exist in states with uncertain numbers of particles, suggesting that charge conservation may play a role.
  • Another participant introduces the concept of charge superselection, which prohibits superpositions of states with different charges, and discusses its implications for charged fields.

Areas of Agreement / Disagreement

Participants express differing views on the applicability of photon properties to other bosons, particularly regarding the influence of charge and mass. The discussion remains unresolved with multiple competing perspectives on the underlying principles.

Contextual Notes

Limitations include the dependence on definitions of charge and mass, as well as the unresolved nature of how these factors influence superposition and interference in different bosons.

ricko
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A photon has an energy correleated with its frequency. Photons can interfere.
Can the same be said for other bosons, like the Higgs?
 
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A frequency may be ascribed to any particle, not just photons and any particle may interfere with itself.
What is peculiar about the photon is that it carries no charge and therefore it is possible to have superpositions of states containing different number of photons. Then the fields themselves become observables.
Higgs bosons are also not charged, so should behave similar to photons in that respect (however they are massive).
 
DrDu said:
... photon ... carries no charge and therefore it is possible to have superpositions of states containing different number of photons

I'm not sure why this is the case - why I cannot have bunch of W+ bosons (or electrons) with uncertain number of particles, such as the eigenstate of annihilation operator. Is it because that would mean uncertain total charge, while charge must be conserved? But energy must also be conserved and there are states with uncertain energy (non-stationary states).

Or is it because like charges repel? But globally the net charge is zero in a charged field.
 
This is called charge superselection which prohibits superpositions of states with different charge. Likewise you may view it as a consequence of the global unitary transformations possible for charged fields. These will average out all non-diagonal terms in superpositions of different charge.
 
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