The unification of general relativity and quantum mechanics from "summary" of The Elegant Universe: Superstrings, Hidden Dimensions, and the Quest for the Ultimate Theory by Brian Greene
The quest to unite general relativity and quantum mechanics has been a long-standing challenge in the field of theoretical physics. General relativity, developed by Albert Einstein, describes the force of gravity as the curvature of spacetime caused by mass and energy. On the other hand, quantum mechanics deals with the behavior of particles at the smallest scales, governed by probabilities rather than certainties. The two theories are incredibly successful in their respective domains, but they clash when applied simultaneously in certain situations, such as at the center of a black hole or during the Big Bang. General relativity breaks down at the quantum level, and quantum mechanics does not account for gravity in its framework. This inconsistency has led physicists to search for a unified theory that can reconcile these two fundamental pillars of modern physics. Superstring theory is one such attempt at unification, proposing that the most basic building blocks of the universe are not particles but tiny, vibrating strings. These strings can give rise t...
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