Noted physicist, computer scientist, and mathematician Stephen Wolfram recently stunned the science community at-large after announcing hed pretty much figured out how the universe works.
Wolframs a household name in the science community. Hes responsible for Wolfram Alpha, the search engine that AskJeeves wished it was, and the creation of a math-based programming language called Wolfram Language used to power the popular Mathematica system and, now, the creation of the Wolfram Physics Project. His contributions go back to his formative years where, by age 14, hed written three books on the subject of physics.
Its important to understand that Wolframs considered a respected scientific mind because his new theory, which is represented as simply A Class of Models with the Potential to Represent Fundamental Physics, come straight out of left field with a pretty wacky approach.
Read: Our universe may be part of a giant quantum computer
Now, of course, wacky is a relevant term when it comes to physics. Woframs attempting to do what Einstein and Stephen Hawking have tried before him: create an explanation for the universe that makes sense. To this end, physicists and other scientists have come up with theories that range from multiple worlds (as in, more than one universe) to were all living in a computer simulation (which just begs the question, whats the universe that the computer is in made of?). So calling a physics theory wacky implies an entirely different level of weirdness.
Lets start at the beginning. According to a blog post from Wolfram, he had a sort-of eureka moment a few months back that gave him insight into the inner workings of the universe. The post begins with the ominous phrase I never expected this.
Then Wolframs fervor immediately paints the picture of a scientist in semi-mad mode:
Its unexpected, surprisingand for me incredibly exciting. To be fair, at some level Ive been working towards this for nearly 50 years. But its just in the last few months that its finally come together. And its much more wonderful, and beautiful, than Id ever imagined.
In many ways its the ultimate question in natural science: How does our universe work? Is there a fundamental theory? An incredible amount has been figured out about physics over the past few hundred years. But even with everything thats been doneand its very impressivewe still, after all this time, dont have a truly fundamental theory of physics.
This all adds up. We do have quantum mechanics, but despite being a very, very successful theory it doesnt quite explain everything. Then theresstring theory, which has taken a bit of a beating in recent years. So yeah, maybe we do need a new kind of physics.
What makes Wolframs theory different is that, well, its not really a theory. Its more like the frame-work of a theory. It seems like hes just saying the universe is made of a 3D mesh with enough point-to-point lines added in to create a physical topography. In other words, it feels like Wolframs proposing that the universe works exactly like a 3D computer model.
This seems like just the kind of thing someone who specializes in creating computer languages would say. Much like how Einstein and Hawking, scientists who specialized in nuclear and astrophysics, decided that gravity and black holes were the key to understanding the universes true nature.
Mathematicians tend to think the universe is made of math and physicists tend to think its made of tiny stuff that keeps getting tinier the closer you look.
Wolfram describes the basics of his new concept as thus:
In the early 1980s, when I started studying the computational universe of simple programs, I made what was for me a very surprising and important discovery: that even when the underlying rules for a system are extremely simple, the behavior of the system as a whole can be essentially arbitrarily rich and complex.
What he then proposes is that everything in the universe can be explained by imagining it all as a series of interconnected points. He explains the topography and physical structure of the universe as a series of unfolding events that follow precise mathematical rules. This seemingly allows Wolfram to explain the concept of time, which Einstein side-steps by combining it with space, as a sort of backdoor math modifier to rationalize expansion.
Per the blog post:
So what then is time? In effect its much as we experience it: the inexorable process of things happening and leading to other things. But in our models its something much more precise: its the progressive application of rules, that continually modify the abstract structure that defines the contents of the universe.
Wolframs offering a set of math-based rules that he believes could eventually become the foundation for a unified theory of everything. But theres a catch: hes asking for the science community at large to help him prove it. Like many big theories especially those that come along to challenge quantum mechanics or string-theory this one has all the answers, but it hasnt worked out which questions make them relevant quite yet.
Perhaps the biggest criticism of Wolframs work is that its a bit dense. The technical explanation alone weighs in at over 400 pages. Its going to take a few months for all of his ideas to see peer-review. That makes it a bit odd that hes already publishing a book, running a project website, and soliciting partnerships to move the work forward. Whats the rush? The universe will still need explaining after everyones had a glance at the paper.
At the end of the day, one has to wonder how much chance a unified theory of the universe that cribs from both the arcade gaming era and Nick Bostroms simulation hypothesis has against M-theory, relativity, or other long-standing remedies.
Still, a rising tide lifts all vessels and Wolframs current passion is bound to yield some interesting mathematical results.
Are you a physicist or physics enthusiast? Let me know what you think about Wolframs new project on Twitter @mrgreene1977.
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