Noun
Bloch sphere (plural Bloch spheres)
(quantum mechanics) A geometrical representation of the pure state space of a two-level quantum-mechanical system, or qubit.
Because the absolute squares of the amplitudes equate to probabilities, it follows that α and β must be constrained by the equation : Bloch sphere The possible states for a single qubit can be visualised using a Bloch sphere (see diagram). Source: Internet
Mixed states can be represented by points inside the Bloch sphere. Source: Internet
Unitary transformations correspond to rotations of the qubit vector in the Bloch sphere. Source: Internet
When employing the Poincaré sphere (also known as the Bloch sphere ), the basis kets ( and ) must be assigned to opposing ( antipodal ) pairs of the kets listed above. Source: Internet