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quantum gravity

theoretical physics

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?

Bicep2 B-modes
cosmology

Possible Echo of Big Bang Detected

Scientists report the possible discovery of primordial gravitational waves, ripples in space-time that carry a record of how the universe began.

Gravitons
theoretical physics

Betting on the Future of Quantum Gravity

New calculations suggest physicists may someday discover a fundamental theory of gravity, but it could require a radical new perspective on the universe.

quantum gravity

Physicists Eye Quantum-Gravity Interface

Physicists have devised experiments that can probe the interface between quantum mechanics and general relativity.

Illustration of an amplituhedron.
theoretical physics

A Jewel at the Heart of Quantum Physics

Physicists have discovered a jewel-shaped geometric object that challenges the notion that space and time are fundamental constituents of nature.

string theory

A Strange Side to Nature

New findings suggest that beneath the surface of quantum theory lies a vibrant string theory world where some matter corresponds to black holes in higher dimensions.

Physics

Alice and Bob Meet the Wall of Fire

If a new hypothesis about black hole firewalls proves correct, at least one of three cherished notions in theoretical physics must be wrong.