🚀 go-pugleaf

In article <1992Sep23.191356.1349@galois.mit.edu>, jbaez@riesz.mit.edu
(John C. Baez) writes:

>Well, part of the point is that there is no wavefunction of the sort
>Psi(R,t) in quantum field theory, quantum field theory being what you
>get when you try to combine quantum mechanics and relativity.  You
>will have to refine your arguments to take this into account because
>nobody claims that quantum mechanics with single-particle wavefunctions
>Psi(R,t) is suitable for relativistic situations.

I'm not sure that I agree. Quantum field theory still gives a
probability amplitude for the process of detecting a particle in a
given neighborhood. I think it is Psi(x) |Phi>, where Psi(x) is now an
operator (a particle annihilation operator) and |Phi> is the state of
the system (in general, with an indefinite number of particles).

What is different about quantum field theory is that because of the
possibility of particle creation, multiple simultaneous detections
cannot be ruled out (although the probability can be made small).

Daryl McCullough
ORA Corp.
Ithaca, NY