Do superstrings exist in two states of spin?

In summary, the question is whether or not a superstring can have two different types of spin, and if they have any spin at all. The answer is yes, strings can have spin and the "super" in "super-string" unifies integer and half-integer spin within the model or theory. This can be achieved by allowing the quantized vibrational excitation to correspond to a wave traveling around the loop of a closed string, which will carry a momentum and angular momentum. Even open strings, which are not points but extensive objects, can have spin.
  • #1
epmc2
4
0
As you could probably tell, my question is whether or not a superstring could exist with two different types of spin, if they have a spin at all?
 
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  • #2
Do superstrings exist? Firstly you must decide is "string theory" is a model vs. a supposition about reality. Second you must determine if such a supposition about reality is operationally meaningful. But all such philosophical qualifications aside...

Yes strings can have spin and the "super" in "super-string" unifies integer and half-integer spin within the ... "model"? ..."theory"?

One way to invoke intrinsic spin in a string is to allow the quantized vibrational excitation correspond to a wave traveling around the loop of a closed string. This traveling vibration will carry a momentum and thus an angular momentum about the string's loop. Higher energy excitations will thus carry higher integer units of angular momentum.
 
  • #3
So what about the spin of open strings?
 
  • #4
Orbb said:
So what about the spin of open strings?

thats what i thought thanks.
but ya... what about open strings if they exist?
 
  • #5
Sure them too. As they are not points but extensive objects giving them spin is a simple matter.
 

Related to Do superstrings exist in two states of spin?

1. What are superstrings?

Superstrings are theoretical one-dimensional objects that are believed to make up the fundamental building blocks of the universe. They are thought to be incredibly small, with a size of about 10^-33 cm, and vibrate at a frequency that determines their properties.

2. How do superstrings exist in two states of spin?

Superstrings are thought to have two possible states of spin, known as clockwise and counterclockwise. This spin is related to the direction in which the string is vibrating. The theory of superstrings suggests that these two states of spin coexist and are necessary for the stability of the string.

3. What is the significance of superstring spin?

The spin of superstrings is important because it affects the properties of the string, such as its mass and charge. The two states of spin also allow for the possibility of different types of particles, as they can combine to form different vibrations and frequencies.

4. Can superstrings be observed?

Currently, there is no way to directly observe or detect superstrings as they are theorized to be much smaller than anything that can be observed with current technology. However, scientists are working on developing experiments and technologies that may one day be able to indirectly detect the presence of superstrings.

5. Are there any alternative theories to superstrings?

Yes, there are several alternative theories to superstrings, such as loop quantum gravity and brane theory. These theories also attempt to explain the fundamental nature of the universe, but they have different approaches and predictions than superstring theory. Currently, there is no consensus on which theory is correct, and further research and experimentation is needed to determine the validity of each theory.

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