Wolfram Language Paclet Repository
Community-contributed installable additions to the Wolfram Language
Wolfram`TensorNetworks`
TensorNetworkAdd  |
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Details and Options
Examples
(10)
Basic Examples
(1)
Build a triangle tensor network with three free indices contracted pairwise:
In[]:=
t1=RandomReal[1,{2,3}];t2=RandomReal[1,{3,4}];t3=RandomReal[1,{4,2}];t4=RandomReal[1,{2,2}];tn=TensorNetwork[{t1,t2,t3},{{idx1,idx2},{idx2,idx3},{idx3,idx1}}]
Out[]=
TensorNetwork
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Append a fourth tensor sharing index idx1; idx1 becomes contracted and idx5 enters the free-index set:
In[]:=
newTN=TensorNetworkAdd[tn,t4,{idx1,idx5}]
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TensorNetwork
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Append the same tensor on two fresh indices instead, leaving the existing network untouched and adding two new free indices:
In[]:=
TensorNetworkAdd[tn,t4,{newA,newB}]
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TensorNetwork
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Move to the annotated Graph form via ToTensorNetworkGraph and inspect its free indices:
In[]:=
chain=TensorNetwork[{RandomReal[1,{2,3}],RandomReal[1,{3,4}]},{{a,b},{b,c}}];g=ToTensorNetworkGraph[chain]
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Append a rank-2 tensor to the Graph at one of its free legs; the result is a new annotated Graph:
In[]:=
TensorNetworkAdd[g,extraTensor5,{Superscript[1,1]}]
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Scope
(4)
Applications
(2)
Properties & Relations
(3)
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