Undergrad Deriving Special Relativity from Particle Indistinguishability

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SUMMARY

Special relativity (SR) cannot be derived from the principle of quantum mechanics that states particles of the same type are indistinguishable. The discussion highlights that indistinguishability does not imply that the laws of physics are identical in different inertial frames, such as a train and a laboratory. The laws of physics apply equally to both distinguishable and indistinguishable particles. Furthermore, the relationship between SR and quantum mechanics is linked to charge-parity-time symmetry, rather than indistinguishability.

PREREQUISITES
  • Understanding of special relativity principles
  • Familiarity with quantum mechanics concepts
  • Knowledge of particle physics and indistinguishability
  • Basic grasp of charge-parity-time symmetry
NEXT STEPS
  • Research the implications of charge-parity-time symmetry in quantum mechanics
  • Study the foundational principles of special relativity
  • Explore the concept of indistinguishable particles in quantum mechanics
  • Investigate the causal structure of Minkowski spacetime
USEFUL FOR

Physicists, students of theoretical physics, and anyone interested in the relationship between quantum mechanics and special relativity.

accdd
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Is it possible to derive special relativity from the principle of quantum mechanics according to which particles of the same type are indistinguishable?
For example, if it is not possible to distinguish particles of the same type then particles colliding in a train at constant speed should produce the same result as those colliding in the lab. This would imply that the laws of physics are the same on the train and in the laboratory.
Is that a question that makes sense?
 
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accdd said:
Is it possible to derive special relativity from the principle of quantum mechanics according to which particles of the same type are indistinguishable?
No.
For example, if it is not possible to distinguish particles of the same type then particles colliding in a train at constant speed should produce the same result as those colliding in the lab. This would imply that the laws of physics are the same on the train and in the laboratory.
That does not follow. The laws of physics apply to distinguishable particles just as they do to indistinguishable ones, so they can be the same on the train and in the lab regardless of the distinguishability of the particles.

Note that this notion that the laws of physics are the same in all inertial frames way predates the development of SR.
 
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It’s not at all clear how “indistinguishable particles” implies the causal structure of Minkowski (lorentz-signature) spacetime
(with its finite maximum signal speed).
 
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accdd said:
Is it possible to derive special relativity from the principle of quantum mechanics according to which particles of the same type are indistinguishable?
No, but SR is related to quantum mechanics charge-parity-time symmetry.
 
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