Applied string theory

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An outstanding problem of modern theoretical physics is the striking contrast between two frameworks we use to describe physics at vastly different length scales of our Universe. Quantum mechanics prescribes a statistical interpretation to the motion of subatomic particles at shortest distances. On the other hand, Einstein's theory of general relativity uses the notion of the spacetime geometry as a basic to the interpretation of current astrophysical measurements. Though both theories have sustained remarkable experimental tests in their corresponding realms of validity, their apparent dissimilarity calls for a more fundamental description: a single unifying framework valid from microscopic to astronomical distances.