A key question in physics is whether gravity follows quantum rules, but testing this is difficult because gravitational ...

Breakthroughs in science often begin with a simple question and years of tireless exploration. From the way tiny molecules slip through microscopic pores to the staggering behavior of matter near ...

In quantum physics, objects can exist in multiple states at the same time—a phenomenon known as quantum superposition, where ...

Quantum mechanics has always carried a quiet tension. At its core, the theory allows particles to exist in many states at once, described by a mathematical object called a wavefunction. Yet daily life ...

The most precise clocks ever built can now detect gravity’s warping of time across a distance shorter than a pencil tip. That ...

Unifying gravity and quantum theory remains a significant goal in modern physics. Despite the success in unifying all other fundamental interactions (electromagnetism, strong force and weak force) ...

Scientists have taken a major step toward probing one of physics’ biggest mysteries—how gravity and quantum mechanics fit together—by creating the first unified way to detect tiny “ripples” in ...

At Aalto University in Finland, two physicists believe they may have cracked a puzzle that has defied generations of scientists: how to reconcile the physics of the very big with the physics of the ...

Once a baffling theory, quantum mechanics has evolved into a driving force behind modern technology and frontier research.

For the first time, scientists have observed quantum entanglement in the momentum of massive particles. The result, decades ...

Other scientists have investigated the idea of a hidden structure further. David Bohm, a 20th-century physicist, built a ...