Hmmm. Reality. Interesting concept, but do we have a clue as to what it really is?
Well, actually, no. All we have is this consensus. We all agree that things are pretty much as they seem. But, it could be, as George Musser says, that
The universe we see playing out in space may be just the surface level, where we float like little boats while leviathans stir in the deep. [from: Musser, George. Spooky Action at a Distance: The Phenomenon That Reimagines Space and Time–and What It Means for Black Holes, the Big Bang, and Theories of Everything (p. 182). Farrar, Straus and Giroux. Kindle Edition.]
Mosser says that many of the leading researchers and theorists in physics and the related fields of quantum mechanics and such question the very ground of assumptions that science has made for the past several centuries. “Localism” or the idea that things have a position in space – pretty basic assumption, right? — is no longer held to be a valid scientific idea.
Which is confirmed by recent, high-level experiments reported in this Atlantic article, and is increasingly becoming the consensus opinion of scientists in the field. Borrowing a very telling metaphor from physicist and philosopher Jenann Ismael, Musser says:
Today we know that the universe has more to it than things situated within space. Nonlocal phenomena leap out of space; they have no place in its confines. They hint at a level of reality deeper than space, where the concept of distance ceases to apply, where things that appear to lie far apart are actually nearby or perhaps are the same thing manifested in more than one place, like multiple images of a single shard of kaleidoscopic glass. When we think in terms of such a level, the connections between subatomic particles across a lab bench, between the inside and the outside of a black hole, and between opposite sides of the universe don’t seem so spooky anymore.
Ismael says that like a kaleidoscope, where a single bead of glass is “redundantly represented” in different parts of the view screen of the device, what we are learning about the nature of reality means
…seeing space as we know it— everyday space in which we view measurement events located at different parts of space— as an emergent structure. Maybe when we’re looking at two parts, we’re seeing the same event. We’re interacting with the same bit of reality from different parts of space.
In other words, space – in fact, the so-called “space-time continuum” – doesn’t really ‘exist’ in the way we usually think of that term. We are seeing effects from some deeper level of whose nature we have no notion. Physicists are just beginning to suggest various ways of thinking about this, ideas for ideas, that may eventually lead to an understanding of at least a theory of what it actually is, even though it’s very unlikely we’ll ever have evidence or experience of that actuality itself. An emergent structure. A reality that is emerging from some other, unknown, level. Spacetime is an experience that we have, but that manifestation is coming from some other more basic reality.
Bogles the mind really. But that’s because we’re trying to think of these things in terms of space, in terms of locality, in terms of our experience. Because that’s the only way our mind works. So scientists engaging this question are looking for a completely new way of conceiving of reality. Pretty challenging.
As Musser says, “This thinking completely inverts physics. Nonlocality is no longer the mystery; it’s the way things really are, and locality becomes the puzzle. When we can no longer take space for granted, we have to explain what it is and how it arises, either on its own or in union with time.”
These building blocks of spacetime would have neither size nor location, much as a molecule of water is not “wet”. Only the combination of the molecules produces the phenomena we know as water, with all it’s attendant properties. Or like building a model of the Eiffle Tower with popsicle sticks.
In this approach, space is thought of as a notion that explains, or organizes in a convenient way, what we experience. That we might eventually develop a theory that explains that notion in a more causal, existential way is pretty exciting to me.
I intend to try to keep up with the progress in this area, and try to understand it. Which is what leads me to blog about it, creating a new category here, “Quantum Reality” to help me follow and develop my own understanding. Hope some of you find that interesting and will join me in this fascinating quest.