Showing posts with label string theory. Show all posts
Showing posts with label string theory. Show all posts

16 November 2008

John D. Barrow—New Theories of Everything


Back in early June, I had made note of some thoughts I had (yeah, it happens) about the search for a "Theory of Everything". I try to keep abreast of current work in cosmology and high-energy physics, particularly if new work appears that's crafted for the education of the layman, "because that's who I am, and that's who I care about." Anyhow, I made the notes regarding the nature of what a theory of everything actually is. Fundamentally, it's a religious pursuit undertaken by ostensibly secular physicists and mathematicians. Why do I call it a religious pursuit? Mainly because in order to reduce the workings of the universe to a comprehensible, elegant mathematical function one must know far more than I think we're capable of understanding (i.e.; initial conditions for the grand event that birthed our universe).

Now there are reasons why I don't think we can know these, and that's where Cambridge mathematician/cosmologist John D. Barrow comes in. New Theories of Everything is an update of a book he wrote in 1991 and provides incredibly clear explanations for a vast array of mathematical and cosmological concepts. (As in frightening, geniusesque clarity.) It's exactly the high-end pop-science book I've needed to read for a while, because while Barrow's grasp of physical phenomena is tight, his deep knowledge allows him to be critical of certain directions many of his peers are taking.

The main premise of the book revolves around the idea that there is no reason to think that the physical properties of our universe can be distilled into one mathematical function. While our universe may have a mathematical skeleton, there are many aspects of its existence that are chaotic and non-linear and other aspects (think closer to home à la the arts) that don't seem to have mathematical explanations at all. Without knowledge of the exact states of initial conditions of these chaotic phenomena we have no way of predicting how future states will turn out (thus negating the ability to confirm the accuracy of an equation or experiment). Symmetry breaking also gives theorists headaches for similar reasons, but I just mangled that last explanation so I'll leave this one for the expert (read the book) to flesh out.

Lastly, I must mention—and I'm cutting this review off because I'm obviously not a physicist and I've also been enjoying some scotch—this book left me a bit baffled. Not by the content per se, as it was expertly explained and I highly recommend reading it, but by the author himself. You see John D. Barrow is a religious man, of a specific christian denomination. Now it may be obnoxious of me to go down this path, but after reading such an obviously brilliant explanation of some of the most conceptually difficult material for humans to comprehend, I cannot help but wonder how its author holds such traditional christian beliefs (i.e.; that jesus our savior, the viability of the trinity, etc.) and is able to reconcile them with all he knows of our universe—not to mention the possibility of an infinite multiverse of which our universe is only one small bubble. I find this realization more troubling and difficult to comprehend than the ideas of infinity or nothingness. But maybe I'm the weird guy.

Anyway, regardless of my ever-dyspeptic responses to the continuing presence of nonsensical religious beliefs in today's world, read this book if you have any interest whatsoever in quantum phenomena, chaotic systems, universal origins, multiverse theory, string theory and any aspects of mathematics. The latter almost always forms a stumbling block for laypersons and Barrow's ability to explain various mathematical concepts made me want to strangle all the terrible math teachers I had growing up who never explained a single fucking thing.

fin.

17 March 2008

This ain't so bad at all!

Sorry I haven't posted anything in the past week or whatever (if it even matters). But I've found some really great stuff while glued to my laptop in the endless pursuit of knowing more things than I knew yesterday and then writing about them for money.

1. I wrote a long piece based on all the Turgenev/Nihilism/Postmodernism stuff I rambled about not too long ago. Because of that research I discovered that I was right about many aspects of "postmodernism" (ie; it's not really a coherent thing at all), but also that I was a bit
closed-minded about it and there are some writers whose stuff I really appreciate. One of them is Richard Rorty. When I first was exposed to some of his ideas I thought they were reprehensible. Of course, when I read the interviews with him gathered in Take Care of Freedom and Truth Will Take Care of Itself, I realized I agreed with an incredible amount of pragmatist and antifoundationalist thought. It also germinated a drive to recast elements of nihlism in a more positive light (though that's a really long-term project, I guess). You can get a good idea of where my brain might be after reading the essay through which I was exposed to Rorty's ideas. Now I don't necessarily agree with everything in the essay, but I don't think I have to agree with anything. Necessarily.

2. Tonight I finished an article on string theory and cosmology that was exhausting to research. Fortunately I found a great guide to help me out and give me some focus. A couple months ago I waddled my way through Brian Greene's The Elegant Universe and enjoyed it despite not really understanding a whole lot of what was going on. Thankfully, PBS made a three part documentary based on the book that makes a fantastic companion! The whole thing is streamed here in segments which make it way more manageable to watch. It also makes it a hell of a lot easier to watch a part again if you didn't understand it the first time. I had to do that a few times.

3. After this week I'll hopefully be able to return to posting a bit more regularly. I just have a bunch of material to submit in a short time. Since I have no idea when the site I'm writing for is going to be up and running, I may post more excerpts and links to keep any readers updated on things. Also, if any of you haven't yet, go check out some of my friends' blogs. A few of them
(here, here & here) have been contributing material to the same website and I think the product will be incredibly interesting (I'll keep everyone updated when it finally goes online).

16 January 2008

Oh, If Only I Knew What He Was Talking About


Brian Greene - The Elegant Universe

Alright, this is going to be a bit of a bullshit post, if only because I finished this book a week ago. I had a great post in my head, but my internet was spotty and I failed to write anything down or take notes for myself. That was stupid of me, though certainly not the first time that's ever happened.

With that caveat in mind, here's the main point (I think) I wanted to make last Monday. As much as any book on string theory can be, The Elegant Universe is a winner. Greene boils down the essentials in an incredibly simple fashion with easy-to-understand and insightful analogies. String theory is mind-bogglingly complex; it stretches beyond what most humans are capable of imagining (and that includes many of the involved scientists). Without knowing the math behind all this, it remains difficult (in my opinion) to perceive this microscopically small world, so I commend Dr./Prof./Mr. Greene for his efforts in trying to make all this accessible to the layman. I can't possibly begin to describe this world here and it would be a crime for me to try. Realistically, I need to reread whole chapters at some point because there is so much that I had to skim through because I simply did not understand what was going on.

My own ignorance notwithstanding, what I found lacking in this work was some of the storytelling. A good deal of the book is devoted to the history and development of string theory, Greene lays down the foundations of 20th century physics as it relates to the most modern conceptions of how the world has begun to appear to modern theorists. However, in an attempt to ground and humanize many of the "characters" here, the main story tends to drag; details of the lives of these (mostly) men and their situations come at the cost of attention to the flow of ideas. I guess that would be my only critique, as I found my attention wandering about 3/4 of the way through when that should really be where things are picking up steam and careening towards a conclusion. This isn't to say that Greene is a terrible narrator, but I think some editing of the storyline could have helped me keep focus when the physics started to get more complicated and outright weird.

I definitely recommend The Elegant Universe for those uninitiated in the world of string theory (much as I was). Given that this book was written a couple years ago, a lot of this work has been furthered in that elapsed time. I've been trying to find "updates" of sorts, but I'm finding material hard to come by. I'm also looking for anything that might be able to tie chaos theory in with any of this string business. If anyone knows of anything, point me in the right direction...