Quantum information theorists shed light on entanglement, one of the spooky mysteries of quantum mechanics

A computer based on a quantum bit instead of a classical bit could have a significant computational advantage. And that's because a classical bit produces a binary response - a 1 or a 0 - to just one query.

In contrast, the qubit produces a binary response to infinitely many queries using the property of quantum superposition. This property allows researchers to connect multiple qubits in what is called a quantum entangled state, where the entangled qubits behave collectively in a way that arrays of classical bits cannot.

This means that a quantum computer can perform some calculations much faster ...