GATE PH 2019 PH Q9: Quantum Mechanics

For a spin

particle, let

and

denote its spin up and spin down states, respectively. If

and

are composite states of two such particles, which of the following statements is true for their total spin

Your answerChoose one option.

for

, and

is not an eigenstate of the operator

, and

for

, and

for

, and

for

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