The world’s best clocks may be sensitive to an odd mix of quantum and relativistic effects that would stretch time and test ...

Not every day does “time” get into misbehavior, but in a new experiment, photons passing through a fog of ultracold rubidium-85 atoms were shown to spend a negative duration in an excited atomic state ...

For more than a century, physics has been built on two great theories. Einstein's general relativity explains gravity as the ...

This article explores how our understanding of the universe has evolved—from the scale of everyday experience down to the ...

Assigning ends of the system the standard experimental nicknames of Alice and Bob, the task required Alice to create a ...

Albert Einstein’s theory of gravity, general relativity, is famously incomplete. As proven by physics Nobel laureate Roger Penrose, when matter collapses under its own gravitational pull, the result ...

The Irish mathematician and physicist William Rowan Hamilton, who was born 220 years ago last month, is famous for carving ...

Within our comfortable world of causality we expect that reactions always follow an action and not vice versa. This why the recent chatter in the media about researchers having discovered ‘negative ...

NVIDIA, the AI boom's $4 trillion chipmaker, is now betting on quantum computing—despite doubts about how soon the technology ...

Quantum mechanics continues to offer profound insights into the fundamental nature of matter and energy, and the use of special functions plays a critical role in obtaining exact analytical solutions ...