Time feels steady and familiar in daily life, but at the quantum level it becomes slippery. That puzzle now has a fresh twist thanks to new research led by physicists at École Polytechnique Fédérale ...

Quantum mechanics has always carried a quiet tension. At its core, the theory allows particles to exist in many states at ...

Physicists have found a way to measure how long ultra-fast quantum events actually take—without using a clock at all.

Time feels like the most basic feature of reality. Seconds tick, days pass and everything from planetary motion to human memory seems to unfold along a single, irreversible direction. We are born and ...

At the smallest scales of nature, the rules of the world shift in ways that can feel unsettling and beautiful at the same time. Matter no longer behaves like solid objects moving along clear paths.

For decades, quantum physics and general relativity have stood as two powerful but separate theories. Quantum physics explains the behavior of tiny particles like atoms and photons. General relativity ...

Using a superconducting quantum computer, physicists created a large and complex version of an odd quantum material that has ...

Cosmology and quantum physics both offer tantalizing possibilities that we inhabit just one reality among many. But testing that idea is challenging.

The white pickup truck pulls up to a decommissioned space observatory on top of Mount Blue Sky, one of Colorado’s famous “14ers,” mountains that reach more than 14,000 feet high. The scene is stark on ...

An old puzzle in particle physics has been solved: How can quantum field theories be best formulated on a lattice to ...

Physicists have now managed to track the passage of time inside a quantum event without using anything that looks like a ...