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Dark Energy, the String Theory, physics - Page 2

post #21 of 25
One thing I would like to correct is your definition of dark energy. "I happened across "dark energy" which are imaginary particles in physics which nobody has ever observed but which must exist in order for us to explain how some things just gain mass."

Dark energy is absolutely NOT imaginary! Dark energy (which has been captured by Hubble) is the 'force' that is causing our universe to expand and explains the accelerated rate at which our universe is expanding. "Gaining mass" as you put it actually goes against a fundamental law that mass can be neither created nor destroyed. Dark matter is an explanation for the vast amount of 'space' in space. Both of these are hypotheses, but Dark energy is closer to becoming a theory due to the recent visual aspects of Hubble. Hubblesite.org is an amazing website.

Your original post about string theory doesn't make any sense to me. My understanding of string theory is that it is an extremely complex set of mathematical equations that describes (or attempts to) fundamental particles over several dimensions. I do not understand the "silver cord" you are referring to and there was nothing like that taught in my physics class.

Good luck with your self discovery.
post #22 of 25
Wow soooo interested. Really making my little brain work here, keep up this interesting conversation!
post #23 of 25
Thread Starter 
Quoting this webpage:
http://theophys.kth.se/tepp/research...imensions.html


Quote:
. The idea that spacetime could have more than four dimensions was first proposed by Theodore Kaluza (see Ref. 1) and Oskar Klein (see Ref. 2) at the beginning of the twentieth century. Higher-dimensional gauge theories are interesting for several reasons. In string theory, extra dimensions are required in order to cancel quantum anomalies. But even in an ordinary higher-dimensional quantum field theory context one can address several of the shortcomings of the Standard Model, for example, the gauge hierarchy problem (see Refs. 3 and 4), the smallness of neutrino masses (see Ref. 5), or the dark matter problem (see Ref. 6).

In order to have avoided detection so far, any extra dimensions have to be compact and small. Naively, the limits on the size of extra dimensions are small enough to rule out an observation of them in the forseeable future. However, in recent years, different models have been proposed that avoid these stringent constraints. These models could potentially be tested in high-energy experiments, such as the Large Hadron Collider (LHC) at CERN, Geneva, Switzerland, which is scheduled to become operative in 2009.

Large extra dimensions
Universal extra dimensions
Extra dimensions and deconstruction
Large extra dimensions

Large extra dimensions were first proposed by Arkani-Hamed, Dvali, and Dimopoulos (ADD) in 1998, their model being known as the ADD model (see Ref. 3). The novel feature of this model is the assumption that the Standard Model (SM) fields are confined to a so-called brane, which is a four-dimensional manifold residing in the full bulk spacetime. This brane is to be identified with ordinary four-dimensional spacetime. Since the SM fields are not allowed to probe the extra dimensions, experimental constraints on their size are avoided to a large extent. Gravity, on the other hand, carries no SM charges and is allowed to probe the extra dimensions. In principle, the assumption that gravity lives in a higher-dimensional spacetime leads to deviations from Newton's inverse-square law at short distances. However, because of its weakness relative to the SM forces, gravity has only been tested down to distances of the order of micrometers, and hence, the experimental constraints are still quite weak.
post #24 of 25
Thread Starter 
Justice2. I just googled "fundamental particles over several dimensions" because I thought it sounded neat. I quickly came up with the page I just quoted. In my op I said I heard that our bodies live on earth, our souls live in the astral plane (I can't figure out what that is either, maybe just outerspace?) and our spirits, or the truest essences, the purest parts, whatever.. of everyone of us is somewhere else right now just pass the edge of all the physical mass in space. Since that's beyond time and space there's no division there and "god" is just pure energy that fills up that whole place and is made up of us.
Gotta go. BBL. I like hearing new things.
post #25 of 25
Quote:
Originally Posted by hablame_today View Post
Justice2. I just googled "fundamental particles over several dimensions" because I thought it sounded neat. I quickly came up with the page I just quoted. In my op I said I heard that our bodies live on earth, our souls live in the astral plane (I can't figure out what that is either, maybe just outerspace?) and our spirits, or the truest essences, the purest parts, whatever.. of everyone of us is somewhere else right now just pass the edge of all the physical mass in space. Since that's beyond time and space there's no division there and "god" is just pure energy that fills up that whole place and is made up of us.
Gotta go. BBL. I like hearing new things.
Hablame that is cool. I like it. The part about our spirits being beyond space and time made me think of our consciousness and where it goes when we dream. I believe that where ever our consciousness goes when we are asleep, into another world, means that it is able to exist beyond space and time in order to be able to travel so and show us the things it does through dreams. But when we are conscious, where is it? How is our body aware and able to feel/register sensations, experience emotions? The brain is a physical thing, the CNS is a physical thing. Consciousness that allows us to think about and make sense of what we feel or see or experience isn't a physical thing. I think about that and wonder where does consciousness live?
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