String theory

In physics, string theory is a theoretical framework in which the point-like particles of particle physics are replaced by one-dimensional objects called strings. It describes how these strings propagate through space and interact with each other. On distance scales larger than the string scale, a string looks just like an ordinary particle, with its mass, charge, and other properties determined by the vibrational state of the string. In string theory, one of the many vibrational states of the string corresponds to the graviton, a quantum mechanical particle that carries gravitational force. Thus string theory is a theory of quantum gravity.

String theory is a broad and varied subject that attempts to address a number of deep questions of fundamental physics. String theory has been applied to a variety of problems in black hole physics, early universe cosmology, nuclear physics, and condensed matter physics, and it has stimulated a number of major developments in pure mathematics. Because string theory potentially provides a unified description of gravity and particle physics, it is a candidate for a theory of everything, a self-contained mathematical model that describes all fundamental forces and forms of matter. Despite much work on these problems, it is not known if string theory describes the real world or only aspects of it, or how much freedom the theory allows to choose the details.

String theory (disambiguation)

String theory is a branch of theoretical physics

String theory may also refer to:

See also

Five Years Gone

"Five Years Gone" is the twentieth episode of the first season of the NBC science fiction drama series Heroes. It is the last episode before the three-part finale of season one. This episode was originally known as "String Theory." The title was changed to "Five Years Gone", and "String Theory" was used as the title of Chapter 30 in the graphic novels.

Plot

This episode focuses on Hiro Nakamura and Ando Masahashi traveling five years into the future, showing where the world will be if the explosion isn't stopped. Future Hiro, last encountered in the episode "Hiros", is featured more prominently, this time as the world's most wanted terrorist and a master of Battōjutsu. Ando was killed in the blast, which according to Peter, is the reason why Hiro lost his humorous side and became obsessed with changing the past.

Nathan Petrelli is now the President of the United States, with Mohinder Suresh as his Chief Medical Advisor and Matt Parkman as the head of Homeland Security with the Haitian at his side. Niki Sanders has become a stripper again, adopting "Jessica", the name of both her former alter ego and sister, as her stage name. Her son Micah was killed in the explosion that destroyed much of New York. Niki has a romantic relationship with Peter Petrelli, who has a distinct scar across his face which starts on the right side of his forehead down to his left cheek.