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A Physicist’s Physicist Ponders the Nature of Reality
Edward Witten reflects on the meaning of dualities in physics and math, emergent space-time, and the pursuit of a complete description of nature.
Juan Maldacena, Pondering Quantum Gravity by the Pond
One of the world’s preeminent theoretical physicists seeks a quiet place to think.
Physicists Uncover Geometric ‘Theory Space’
A decades-old method called the “bootstrap” is enabling new discoveries about the geometry underlying all quantum theories.
The Strange Second Life of String Theory
String theory has so far failed to live up to its promise as a way to unite gravity and quantum mechanics. At the same time, it has blossomed into one of the most useful sets of tools in science.
String Theory Meets Loop Quantum Gravity
Two leading candidates for a “theory of everything,” long thought to be incompatible, may be two sides of the same coin.
In Fake Universes, Evidence for String Theory
If string theorists can show that their framework is the only consistent theory of quantum gravity, does that make it true even without tangible evidence?