https://arxiv.org/abs/cond-mat/0211703

Enjoy

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-------- Original message --------

From: adfws <ll070616@126.com>

Date: 20/09/2018 05:51 (GMT+01:00)

To: comp-phys-alps-users@lists.phys.ethz.ch

Subject: [ALPS-users] Why spin 1 chain is added two spin 1/2 sites at its both ends?

Hi everyone,

I'm reading DMRG tutorials in
http://alps.comp-phys.org/mediawiki/index.php/ALPS_2_Tutorials:DMRG-01_DMRG.
When treating spin 1 Heisenberg chain with open boundary conditions, 2 spin 1/2 sites were added to both ends of the spin 1 chain. Why?
I have completely no idea about this special treatment. Can anyone give further explanations?

LiuBiao
ll070616@126.com

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