sci.physics.particle

Fields in QFT are mathematical objects. This means fields
don't really exist?

By real is meant that it can be registered by instruments.
Particles properties can be measured, but how about
fields?

We seem to need fields to explain how particles
may create or destroy. But what if they don't really
get destroyed or created but just move backward
and forward in time like positrons as electrons moving
from the past? Or in a certain sense we can say
the particles can change properties without any fields.

The arrow of time is created from the Thermodynamics
Second Law. In the particle worlds and in the schroedinger
equations. Time is symmetric and it can't violate causality
in SR because it doesn't work macroscopically.

Some researchers said fields are entirely fictitious and
it's false that particles are energy and momentum of
the field. The use of fields is only to model particles
and fields are not real while only particles that can
move backward and forward in time are real.

What do you think?

Dac