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Hello, just a quick question.
I am aware that a a state in a space can be written as a linear combination of the basis kets of that space
ψ = ∑ai[ψi]
where ai are coefficients and [ψi] are the basis vectors.
I was just wondering is this a linear superposition of states or just a linear combination?
Can it only be a linear superposition if the basis kets are eigenstates of some operator?
Thank you
I am aware that a a state in a space can be written as a linear combination of the basis kets of that space
ψ = ∑ai[ψi]
where ai are coefficients and [ψi] are the basis vectors.
I was just wondering is this a linear superposition of states or just a linear combination?
Can it only be a linear superposition if the basis kets are eigenstates of some operator?
Thank you