Hi ADRIAN<br>I run DMRG program for&nbsp; antiferromagnetic S=1/2 chain,but the result that i achieve for groun state energy&nbsp; doesn&#39;t concur with the result&nbsp; that has achieved from bethe ansats method (0.443147).<br>I have changed m&amp;sweep&amp; number of sites(to 1000 site) but my result just 2 digit concur with 0.443147.<br>
I don&#39;t know what must i do.<br>I will be very appreciate&nbsp; if you can guide me.<br>&nbsp;<br>Thanks<br>zhian<br>