Dear Rongyang,

The TruncatedWeight is the sum of the square of the discarded singular values during a truncation.
This is the same value used in other DMRG applications.


Best regards,
Michele



On 7 Jan 2018, at 08:00, Rongyang Sun <sun-rongyang@outlook.com> wrote:

Dear ALPS users,

The ALPS MPS code can print 'TruncatedWeight' to estimate the error of the simulation. I have a question:

What is the meaning of this quantity and the relation with the truncation error in traditional DMRG simulation?

For Fig. 5 in Computer Physics Communications, 185(12):3430 – 3440, 2014., the quantity may be summed as the final truncation error after a sweep.

Thanks a lot!

Best regards,
Rongyang Sun


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