In string theory, fundamental particles such as electrons are not described as point-like particles but rather as tiny, one-dimensional objects called strings. According to string theory, these strings are incredibly small and can be thought of as the fundamental building blocks of the universe.
Each elementary particle, like the electron, is associated with a specific vibrational pattern or mode of the string. The different vibrational modes of the string give rise to the various properties and characteristics of the particle. For example, the mass, charge, and spin of an electron are determined by the specific vibrational pattern of the underlying string.
In the framework of string theory, an electron is typically described as a single string vibrating in a particular way. It is not considered to be composed of multiple strings or a collection of smaller strings. However, it's important to note that string theory is a highly complex and mathematically intricate theory that is still under active research and development. As such, the precise details of the structure of particles within string theory are still being explored and refined.
Furthermore, it is worth mentioning that string theory also allows for the existence of higher-dimensional objects called branes. These branes can have multiple strings attached to them, leading to the formation of more complex configurations and objects within the theory. However, when discussing elementary particles like electrons, the standard description involves individual strings rather than bundles or ensembles of strings.