Quantum theory and Einstein's theory of general relativity are two of the greatest successes in modern physics. Each works ...

Quantum mechanics and relativity are the two pillars of modern physics. However, for over a century, their treatment of space ...

A new theory of quantum gravity, which attempts to unite quantum physics with Einstein's relativity, could help solve the puzzle of the universe's expansion, a theoretical paper suggests. When you ...

For more than a century, the double-slit experiment has been the sharpest test of what reality is made of, and of whether ...

The prevailing assumption has been that Einstein's theory of gravity must be modified, or 'quantized', in order to fit within quantum theory. This is the approach of two leading candidates for a ...

Researchers at Google have used their Willow quantum computer to demonstrate that "quantum contextuality" may be a crucial ...

A new physics paper takes a step toward creating a long-sought "theory of everything" by uniting gravity with the quantum world. However, the new theory remains far from being proven observationally.

"Dark photon" theory says light's interference patterns may emerge from quantum particles, not waves, upending centuries of ...

Was there ever any choice in the Universe being as it is? Albert Einstein could have been wondering about this when he remarked to mathematician Ernst Strauss: “What I’m really interested in is ...

Forgetting feels like a failure of attention, but physics treats it as a fundamental process with a measurable price. At the ...

The nature of quantum entanglement remains an outstanding problem in physics. But Albert Einstein's theories, along with insights from quantum computing, could finally put the mystery to rest. When ...

The original version of this story appeared in Quanta Magazine. Two blind spots torture physicists: the birth of the universe and the center of a black hole. The former may feel like a moment in time ...