Hi

Because you have 6 different spin you must  use the following for your basis and in your parm file you must give them their values such local_S0=1/2, local_S1=1,local_S2=3,local_S4=5 and so on. and for J1=3, J2=4, J3=..  .
<BASIS name="spin">
   <SITEBASIS ref="spin">
     <PARAMETER name="local_spin" value="local_S#"/>
     <PARAMETER name="local_S#" value="local_S"/>

     <PARAMETER name="local_S" value="1/2"/>
   </SITEBASIS>
 </BASIS>


and for bond operators  you must use:

   <BONDTERM source="i" target="j">

     <PARAMETER name="J#" default="J"/>
     J#*exchange(i,j)
   </BONDTERM>


in writing your lattice you must define 3 type edge. (I think it is  easy use graph instead of lattice).

Mohammad.

On Tue, Mar 10, 2009 at 3:30 PM, <comp-phys-alps-users-request@phys.ethz.ch> wrote:
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Today's Topics:

  1. clustered spin simulations (Brian Keith)
  2. Question: model writing (Guilin Zhuang)


----------------------------------------------------------------------

Message: 1
Date: Mon, 9 Mar 2009 16:11:25 -0400
From: Brian Keith <btronk@gmail.com>
Subject: [ALPS-users] clustered spin simulations
To: comp-phys-alps-users@phys.ethz.ch
Message-ID:
       <53f922fd0903091311x44caf6a2v10cd77a6421a174c@mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

Hello,
       I am looking for help in simulating a depleted magnetic rectangle.
Normally I would just introduce the depletion term and go but I need more
control over where the spinless sites are located. Essentially I want to
introduce a bias so that there is a greater chance of spinless sites to be
placed next to each other. I want to promote clusters of spinless sites. I
was looking through the tutorial to find out how to create lattices brute
force to no avail. Is there an easy way to promote these clusters? Or is
there at least a way to manually place  the spinless sites throughout a
lattice?

thanks, Brian

--
Brian Keith
Dept. of Physics
Clark University
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Message: 2
Date: Tue, 10 Mar 2009 18:04:52 +0800 (CST)
From: "Guilin Zhuang" <glzhuang0119@163.com>
Subject: [ALPS-users] Question: model writing
To: comp-phys-alps-users@phys.ethz.ch
Message-ID:
       <15081418.787881236679492284.JavaMail.coremail@app176.163.com>
Content-Type: text/plain; charset="gbk"

Dear teacher!
 I am interested in the magnetic simulation by using SSE package. I have a system of the cluster, including six cobalt. The hamiltonian is as follow:
H=-2{J1*[ S1*S2 + S4*S5 ] + J2*[ S2*S3 + S6*S5 ] + J3*[ S3*S4 + S1*S6 ]}
 How do I write the model?
 I have read the model.xml file in the ALPS software. But the example is almost infinite system, but not isolate system in the file.
 Please help me!




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