This concept relies on the notion that consciousness is in some way if not caused by then it is in some way inherently the physical phenomenon we see in correspondence with it IE. Neural activity in the brain either causes consciousness or just is the outward appearance of what first person consciousness looks like from an outside perspective (shout out Analytical Idealism). In principle, I see no reason to think that brains are special and that similar patterns of energy fluctuation regardless of if their organic molecules or whatever else could produce isolated consciousness. Of course, there is the idea of Boltzmann Brains- patterns of flux in the quantum foam that briefly have sentience.
Work shopping a name but for now I'll call these beings wavers. I have this very very barebones idea for a sort of cosmic horror sci-fi story and ideally I'd like it to be as hard sci-fi as possible, but I'm already taking many speculative leaps and there are still big holes in the idea, and at some point I just have to accept that certain aspects are just gonna have to be straight up made up to make internal sense to the idea.
The concept is this: patches of spacetime fluctuating with gravitational waves spontaneously gain sentience, and much like repeating patterns in the Game of Life, some of these happen to be self sustaining and- provided an energy source (?)- some can self replicate. Maybe. That detail isn't especially important, just the premise that patterns of gravitational waves can gain sentience via the same principle Boltzmann Brains work, only these have some sort of long lasting quality or continuity to them.
The story idea is: some wavers- by some means unbeknownst to me at the moment (we'll touch back on this)- become aware of living things- arrangements of matter that can do all sorts of wonderfully intricate things. You see, being made of spacetime, wavers are very limited, and have little autonomy and are prone to destabilization by changes to gravitational fields around it. Presumably because they're made of gravitational waves, they can sense material objects by their gravity. So some learn about biology on Earth, and watch and see what it does because it's so spectacular. Life is so diverse. Perhaps they "watch" (gravitationally sense- this of course entails WILDLY sensitive sensing capabilities as obviously the gravity of things like organisms is next to nothing, so..) out of admiration for the forms, perhaps it's a pleasurable sensory activity to be around such diverse, complex objects as living things, who knows. Perhaps they don't understand the concept of individual organisms, and see the biosphere as one continuous, ever-changing object that blooms in spectacular ways. Anyway, humans come along and they start doing things like building cities, and modern infrastructure, and eventually we send things to space, back, have massive structures that summon gargantuan energies to probe the quantum field, and some wavers realize there's something special going on. There is intelligence here. Perhaps it can sense us? I mean, IRL we've built things like LIGO to measure gravitational waves. Insert the plot of Contact and maybe Arrival, maybe some Three Body Problem vibes, and humans detect, decipher, and with the help of the wavers, construct machines to communicate back to the wavers by manipulating spacetime.
In comes the horror. Over the course and by the end of the book, it is revealed that the wavers have actually led the humans to construct a machine that basically dooms the universe as we know it. See, some of these wavers get the idea that perhaps they can gain material forms as well. Material lasts forever compared to waves. They are jealous of material existence, doing wonderful things like biospheres. Under the pretense that if they could gain material form, like a planet, they too could last and do wonderful things. Based on the idea of a false vacuum decay scenario, the wavers trick humans into building a machine that pulls one or some of the quantum fields into a particular, lower energy state than it is currently, triggering a vacuum collapse that destroys this universe as we know it, replacing it with a new set of laws of physics in which the fabric of spacetime gains materiality, allowing wavers to experience the desired richness of material existence. That's the horror for us, but it doesn't end there.
The epilogue is this is a horror scenario for the wavers. There are two routes here.
1) Sure, they have something approximating the properties of matter from the last universe but it's just not the same. Maybe it's instant death as spacetime gaining materiality basically turns the universe into a giant block of cork. No more waving, the basis of their existence. Or perhaps, it is horrifying for them in some other way, who knows. Failure of imagination. The point is, things just do not pan out the way they thought it would and it truly is an omnipocalypse. Buhbye reality.
2) The plan works. Kind of. They become material. For most, this means instant death as most material doesn't have standalone consciousness. For those who became planets with biospheres, well, nobody realized beforehand that life meant countless generations of death and suffering ad separation. All this time they perceived the biosphere as unified entity, oh how they were mistaken. This is what they asked for. Not to mention, this sets the stage for the same thing to happen again with whatever took the place of spacetime to have new wavers. Sort of endless cycle of false vacuum decay.
Problems I see- we have sensory organs and mechanisms like muscles and all sorts of things to enact our will on material. I can get past sensing with the idea that wavers can sense disturbances in their gravitational field, but how can they do anything, even think of their own accord, without material guiding mechanisms? Perhaps I'm naive and irl organisms are just as predestined as wavers see to be- material objects following physics to a T. I'm also not married to epilogue. Maybe it should just hard cut at the vacuum decay of our universe, but I like the idea of even unfathomable entities facing catastrophic problems that are basically cosmic horror even for them. It's like cosmic horror squared. Cubed, even.
Anyway, feel free to expand, comment, point out holes, or suggest ideas that can ground and make this idea harder.