[ALPS-users] Question on "MEASURE_LOCAL_AT" in MPS codes

[Desmond]

Dear all,

I'm asking about the custom measurement "MEASURE_LOCAL_AT" in the MPS codes.

For simplicity, let's consider one measurement on the ground state. From
the documentation, the Syntax reads

Op1:Op2:Op3 | (i1, i2, i3)

My question is: what is the order of operation? Do we operate Op1 to the
ground state first or do we operate Op3 to the ground state first?
In another word, does it correspond to <gs|Op1 Op2 Op3|gs> or <gs|Op3 Op2
Op1|gs>?

Thanks!
Desmond
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