The discussion revolves around the concept of virtual particles, particularly in the context of the Unruh effect and their relationship to quasiparticles and real particles. Participants explore theoretical implications, definitions, and the nature of particles in various states, including coherent states and their relevance in quantum field theory.
Participants express multiple competing views regarding the definitions and implications of virtual particles, quasiparticles, and real particles. The discussion remains unresolved, with no consensus on the distinctions or the nature of these concepts.
Participants note that the definitions of virtual particles, quasiparticles, and real particles may depend on context and assumptions, leading to potential confusion. The discussion also touches on the limitations of applying certain theoretical constructs in practical scenarios.
I would writeAccording to the Born rule, the distribution of a quantum observable gives the probabilities for measuring values for the observable in independent, identical preparations of the system in identical states. Thus the presence of a Gaussian distribution means that the attempt to measure the electromagnetic field in the vacuum state cannot be done with arbitrary precision but has an inherent uncertainty.
Yes, that's an improvement. I updated the page.vanhees71 said:According to the Born rule, the distribution of a quantum observable gives the probabilities for measuring values for the observable in independent, identical preparations of the system in identical states. Thus the presence of a Gaussian distribution means that the value of the electromagnetic field in the vacuum state is not determined with arbitrary precision but has an inherent uncertainty.