It is reasonable to include consideration of quanta appearing or disappearing spontaneously in spacetime due to the most basic laws of conservation, hence, no area in spacetime is devoid of potential addition or subtraction of a least common denominator quanta element, causing "noise" in a given experiment. This could manifest as quantum decoherence in an entangled system, normally attributed to thermal differences in the conditions surrounding each entangled particle considered to be part of an entangled set. Because entanglement is studied intensely in simple pairs of entangled photons, for example, decoherence observed in these experiments could well be synonymous with "quantum noise" as to the source of the decoherence. e.g. If it were possible for a quanta of energy to spontaneously appear in a given field, a region of spacetime, then thermal differences must be associated with this event, hence, it would cause decoherence in an entangled system in proximity of the event.