- #1
*FaerieLight*
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There is something that I don't quite understand in relation to the Bloch Sphere representation of qubits. I've read that any vector on the sphere is a superposition of two basic states, like spin up and spin down, denoted by |1> and |0>.
So does this mean that if the vector is at z=0 (pointing towards the equator), then it has neither spin-up nor spin-down components?
If the vector is pointing up 45 degrees above the equator towards |1>, then how is this represented by equations as a superposition of |1> and |0> ?
Also, if a qubit is not affected by external noise, then does it remain a static unprecessing vector on the Bloch Sphere?
So does this mean that if the vector is at z=0 (pointing towards the equator), then it has neither spin-up nor spin-down components?
If the vector is pointing up 45 degrees above the equator towards |1>, then how is this represented by equations as a superposition of |1> and |0> ?
Also, if a qubit is not affected by external noise, then does it remain a static unprecessing vector on the Bloch Sphere?