[ALPS-users] how to calculate <a|n|b>

魏兴波

23 Jul 2021 23 Jul '21

10:11 a.m.

Dear all,

I have a question about the MPS of ALPS. If I have calculated the two ground states |a> and |b> of two systems. How can I calculate the <a|\hat{n}|b>, where \hat{n} is the occupation number operator.

Best,

tutu

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