Ever since Einstein proposed his special theory of
relativity in 1905, physics and cosmology have been based on the assumption
that space looks the same in all directions – that it’s not squeezed in one
direction relative to another.
A new experiment by UC Berkeley physicists used partially
entangled atoms — identical to the qubits in a quantum computer — to
demonstrate more precisely than ever before that this is true, to one part in a
billion billion.