Boltzmann Brains

Boltzmann brains are said to be quantum fluctuations. Named after the Austrian physicist Ludwig Boltzmann, these take on the form of sentient awareness for the relatively brief amount of time they exist, at least in this dimensional plain. Things of John Keel's 'haunted planet' thesis seem to exist not just for a specific space but also for a specific time, and would seem to fit this conjecture. Such would include UFO's, ghosts and crypto-zoological fare such as Mothman and Owlman. Could something animating in range of, for want of a better term, an already existing field of sentience-a human imagination for instance-be formed into a dark item of the imagination and become manifest in this physical realm?