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What Creates the Strings in String Theory?

  1. Feb 17, 2012 #1
    Are there any theories as to what could possibly cause/create the vibrating one dimensional strings in string theory?

    Are the strings at the lower end of electromagnetic radiation? Or something completely different?
     
  2. jcsd
  3. Feb 18, 2012 #2
    What would answer that is M-Theory. Right now it's all about dualities where they may be facet of the same thing.. for example the 5 different string theories. M-Theory may be close to the AsD/CFT world in which superstrings as atyy mentioned are just emergence (or created) from what occurs in this boundary.
     
  4. Feb 18, 2012 #3
    The vibration of the strings have in common with EM waves in the sense that they are both waves (and therefore can have similar mathematical equations).

    However, the photon inherits the string and the string operates in calabi-yau space. Therefore, strings are not at the lower end of the EM spectrum... it's like comparing apples and oranges.

    What causes the string to vibrate? Well that is what energy is. The universe exists by virtue of its energy just like the tics of a clock exist because the clock has been wound up.
     
  5. Feb 18, 2012 #4
    Right but all energy we know of is some frequency of EMR? Right?

    So the strings vibrating has to be some other kind of "energy"?
     
  6. Feb 18, 2012 #5
    Energy is a concept. It implies a system with various states. Energy does not even require units "J" or "eV" as it can be unitless in some framework. It just relates to the difference between states and the action to go from one state to another.

    EMR is an object operating in some framework. The word operating implies that there has to be some sort of energy. But EMR is hardly all the energy we know of since there are many other objects that operate in the universe (such as electrons, planets, animals, and stars).

    Refrain from thinking that one object (such as EMR) is the basis of everything else. I prefer to think that nature forms an infinite regression whereby objects can be defined at any level.
     
  7. Feb 20, 2012 #6
    What is a difference between energy and information ?
     
  8. Feb 20, 2012 #7
    Information represents some kind of order in a system (like the arrangement of atoms, the modes of the strings in a subatomic particle, the position of planets, the mapping of a gravity field, words on a piece of paper)

    In thermodynamics, the internal entropy of a system decreases as the system becomes more ordered and thus more information emerges. This means that the entropy outside of the system had to increase by AT LEAST that magnitude. This means that the net entropy always increases (at least as far as our universe is concerned as well as our current understanding of things).

    Energy is the difference between two states. So for objects to become more (or less) ordered--increasing/decreasing information, energy has to be transferred. Remember: energy is the quantity of action and it is relative difference between two states.

    Energy can be heat, kinetic energy of a moving mass, or even something without "kg" or "m" or "s" in its units. It is up to the investigator to decide what the units of energy are given some framework with objects and states. For example, in string theory, "kg" does not make sense in the units of energy because the notion of "mass" no longer applies. Conventional mass is a macroscopic property and is hidden from string theory. Energy needs to be redefined perhaps with units 1/s (frequency) or some other units.
     
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