Orienting a Spin with a Magnetic Field
Orienting a Spin with a Magnetic Field
A particle with spin precesses around an applied magnetic field. This Demonstration simulates control of the direction of spin by a magnetic field. When the spin is used as a quantum bit (qubit), its quantum state corresponds to a point on the Bloch sphere shown. In that case, the control operation corresponds to the action of a single-qubit quantum gate.