Quantum register

A quantum register is the [[quantum mechanics|quantum mechanical]] analogue of a classical processor register. A mathematical description of a quantum register is achieved by using tensor products of [[qubit]] [[bra]] or [[ket]] vectors. For example, an $n$ qubit quantum register is described by the element $|\backslash Psi\backslash rangle=|\backslash psi\backslash rangle\_\{1\}\backslash otimes|\backslash psi\backslash rangle\_\{2\}\backslash otimes\backslash ldots\backslash otimes|\backslash psi\backslash rangle\_\{n\}$ in the tensor product [[Hilbert space]] $\backslash mathcal\{H\}=\backslash mathcal\{H\}\_\{1\}\backslash otimes\backslash mathcal\{H\}\_\{2\}\backslash otimes\backslash ldots\backslash otimes\backslash mathcal\{H\}\_\{n\}$ {{stub}} [[Category:Handbook of Quantum Information]]