In a quantum experiment, does the leakage of the electromagnetic fields lead to the suppression of quantum effects? For example if I have an electron in a box, in some quantum superposition. Can I use an electrostatic fieldmeter to collapse its wavefunction? How does this problem scale with larger number of particles?
Can it always be screened or is there some uncertainty in the field too that allows to retain its quantum coherence?
What could be said about larger systems if we start to be able to measure their gravitational effects? Why doesn't the leakage of gravitational field collapse the wavefunction of all electrons?