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Night Thoughts of a Quantum Mechanic in the style of Ludwig Wittgenstein. 1

An electric charge is freely falling. A photon detector is freely falling.
The freely falling detector will not detect real photons from the freely
falling charge.

If the detector is at rest relative to the mass source of the gravitational
field it will detect photons from the freely falling charge. The detector
is no longer freely falling it is no longer in an inertial frame if it is
at rest in the gravitational field.

The detector at rest will not detect photons from a charge at rest in the
gravitational field.

However, a freely falling detector will detect photons from a charge at
rest in a gravitational field.

Classically, an accelerating charge radiates energy and slows down
(radiation arrow of time). Quantum mechanically an electron in an energy
eigenstate does not radiate - until it quantum leaps. Once can picture
destructive interference between advanced incoming and retarded outgoing
photons in the stationary electron state. When this destructive
interference shifts, there is a quantum jump induced from the future.  Is
this consistent with Bohm's quantum potential picture which says that an
electron stands still in the S state of hydrogen.