**How does string theory unify quantum mechanics and general relativity**. String theory is a theory of quantum gravity because it attempts to merge quantum physics with the theory of general relativity. While Einsteins General Theory of Relativity describes gravity and thus the world at large quantum physics describes the world of atoms and elementary particles. String theory attempts to unify all four forces and in so doing unify general relativity and quantum mechanics. The lesson there is maybe that the laws of quantum mechanics are very very difficult if not impossible to modify. Quantum mechanics and the general theory of relativity form the bedrock of the current understanding of physicsyet the two theories dont seem to work together. On the other hand string theory very naturally modifies and improves and. String theory in particle physics a theory that attempts to merge quantum mechanics with Albert Einstein s general theory of relativity. The basic idea is that the fundamental constituents of reality are strings of the Planck length about 10³³ cm which. Quantum physics studies the smallest objects in the universelike atoms and subatomic particleswhile general relativity typically focuses on larger-scale objects in the universe. No string theory has not claimed to have unified general relativity and quantum mechanics because if it did it would be the correct solution to the theory of everything. For almost a century the two major theories of physics have coexisted but have been irreconcilable. Because of this Dr Sanchez uses it as a standard theory which emerges from her.

At its core is a fairly simple ideaall particles are made of tiny vibrating. Known as semi-classical gravity this model acts as a useful bridge between the separated theories of quantum mechanics and general relativity and a unified theory of quantum gravity. But string theory predicts that the topology of this manifold determines the laws of physics including the set of particle species while the sizes of the holes in this topology determine the parameters in those laws. String theory is the only consistent quantum completion of general relativity. How does string theory unify quantum mechanics and general relativity This can create about 10500 possible kinds of physics forming whats often called the string theory landscape. When you only look at the classical limit or classical physics string theory exactly agrees with general relativity. Which opens the theory of course to agreeing with general relativity. Physical phenomena rely on. In some sense this is true even in the quantum regime. String theory cures the pathologies of canonical quantum gravity – the uncontrollable infinites simply arent there. Its hard to explain why string theory is free of infinities but a very qualitative picture can be given in terms of a magical properties of strings called UVIR mixing. This shows that quantum mechanics and the theory of relativity really can be unified. It could also transmit gravity on a quantum level and the spread of the particles on a string would theoretically make a less jumpy less crazy atmosphere.

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## How does string theory unify quantum mechanics and general relativity With string theory as an attempt to unify these two disparate theories.

*How does string theory unify quantum mechanics and general relativity*. The desire to escape the mathematical headaches caused by such transformations is one motivation for string theory which allows smooth changes in the topology of space-time says Greene. There are many things wrong with string theory and when plainly stated the people who believe in string theory become major detractors of any other proposal. Subscribe to our YouTube Channel for all the latest from World Science U.

### How does string theory unify quantum mechanics and general relativity Subscribe to our YouTube Channel for all the latest from World Science U.

__How does string theory unify quantum mechanics and general relativity__. There are many things wrong with string theory and when plainly stated the people who believe in string theory become major detractors of any other proposal. The desire to escape the mathematical headaches caused by such transformations is one motivation for string theory which allows smooth changes in the topology of space-time says Greene.

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