Valid input format example

Illustrated by an exemplary run of the spin glass server.
Given an instance of a two-dimensional quadratic 3x3 lattice on a torus with periodic boundaries.

The following represents the definition of a spin glass instance.

Example input file:

name: 3x3 system as a SGS test

1  2  -1.089460678023
2  3   0.526296171959
3  1   1.492510060258
4  5   0.542925533731
5  6   0.440804946137
6  4  -0.555618772831
7  8   0.400843564493
8  9   0.005781770273
9  7  -0.283108779696
1  4  -1.428048251086
2  5   0.063139021975
3  6   1.529559080159
4  7  -1.669458764103
5  8   0.193231695455
6  9   1.291781128584
7  1   0.604670335948
8  2   0.890948261885
9  3  -0.822280541834

Email result:


The Spin Glass Server (SGS) completed your Metajob:

          Name: test-new.txt
          Output Type: long
          Containing Jobs: 1
          Internal Metajob ID: 13675
          Date: Fri Oct 1 12:47:43 2010

result:
--------------------------JOB: 13674 ----------------------------------

Name: 3x3 system as a test for this nice service
Problemtype: gauss
Size: 3

Machine: Intel Pentium 4 CPU 2.80GHz

result:

         Energy (per spin): -0.98580397885
         Magnetization (per spin):0.111111111111
         CPU-Time (min:sec.1/100): 0:00.00

Here comes an optimal spin configuration:

         total number of spins: 9
         spins up: 4

CONFIGURATION_BEGIN
2 4 5 8
CONFIGURATION_END

Interpretation of the result:

  • The ground state was computed on an Intel Pentium 4 CPU 2.80GHz.
  • The computation finished on Fri Oct 1 12:47:43 2010.
  • It took < 0.01 seconds cpu time to compute an exact ground state.
  • The energy per spin is -0.98580397885.
  • The magnetization is 0.111111111111.
  • This configuration is mentioned explicitly between 'CONFIGURATION_START' and 'CONFIGURATION_END'.
    The spins 2, 4, 5, and 8 are all oriented "up", the others (1, 3, 6, 7, and 9) "down".
    (The magnetization per spin is: (5-4)/9 = 0.111111111111).