What would the universe be like if it had four spatial dimensions instead of three? Experimentalists are starting to explore the physics of higher dimensions with the help of recently developed tricks ...

A pair of photons enters an optical maze, and sometimes they leave as something new. Not new in the everyday sense, since both were still photons when they came out. But new in the way they share ...

A team of physicists has demonstrated a four-dimensional quantum logic gate that entangles two photons across four distinct states, rather than the standard two, using the twisting patterns of light ...

In Einstein's famous theory of relativity the concepts of immutable space and time aren't just put aside, they're explicitly and emphatically rejected. Space and time are now woven into a coexisting ...

Physicists have found that this strange, newly discovered quantum behavior has nothing to do with the electrons themselves ...