Recent content by eviegirl

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    The average of the three Pauli Matrices

    Thank you for your thoughts ;) I just started taking a Quantum Optics course, and these first exercises are supposed to refresh whatever QM knowledge we had. Very interesting subject with difficult (or new) exercises.
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    The average of the three Pauli Matrices

    Yeah ;) but I have the feeling I'm blanking out. The most general density matrix I can think of is: rho = 1/2*(I + a*sigma) Where I is the identity matrix, sigma the three Pauli matrices and a a three-dimensional vector. The trace of Pauli matrices are zero, and the trace of an identity...
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    The average of the three Pauli Matrices

    Homework Statement By using the general density matrix rho find the average of the three Pauli matrices. You can then tell how many independent experiments you must make in order to determine rho. Homework Equations The Attempt at a Solution I know the Pauli matrices and their...