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total error while time evolving the state

Posted: 05 Aug 2022, 13:17
by shaktiman
Dear Tenpy Developer,

I am using tenpy for obtaining Finite temperature state with purification tool and then evaluating some local two site quantity from that finite temperature state. I wanted to know how much error I have accumulated while carrying out this imaginary time evolution along with truncation with finite bond dimension (chi). In particular I am using ExpMPOEvolution with order two accuracy, and SVD compression. Does Tenpy keeps track of both errors due to truncation and time evolution, if yes how to get to know from the time evolved state or any other way. Please let me know.