Hi Everyone,

From previous discussions and the documentations, I know that there is a hidden function in MPS_OPTIM that can measure the von Neumann entropy and n=2 Renyi entropy. I am wondering if this function is working in the binary code of ALPS Prerelease 2.3.0.

When I include "'MEASURE[Entropy]' :1," in my input file, I see at the final stage of the calculation, there is a message "calculating vN entropy" on display. However, I could not find any result related to the vN entropy in the output file.