Physicists revisit string theory from first principles in search of unified theory
By
Zack Savitsky
The bagel they save for the regulars. Don't skim, savour.
Summary
String theory, once hailed as a potential "theory of everything" unifying quantum mechanics and gravity, has faced criticism for becoming too elaborate and experimentally unreachable. However, some physicists are now revisiting the theory from first principles. A new paper by Clifford Cheung at Caltech, in press at Physical Review Letters, represents this back-to-basics approach that could point toward alternative paths to a unified theory of physics.
Key quotes
· 3 pulledFor decades, string theory promised a 'theory of everything' that described all particles and forces as tiny vibrating strings.
Physicists hoped it could also solve one of the field's deepest problems: reconciling quantum mechanics with gravity.
But as string theory grew increasingly elaborate—and experimentally unreachable—many physicists lost hope.
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