Compiling the Sample Codes

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To compile all of the sample codes, first compile

the ITensor library following the instructions on

the itensor.org website. Then inside of this folder,

issue the command

make

to compile all of the sample codes.

To compile just one of the sample codes, such as

dmrg.cc, issue the command

make dmrg

or more generally `make <codename>` to compile

the file <codename>.cc

Descriptions of the Codes

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dmrg - simple ground-state DMRG of spin chains

dmrgj1j2 - DMRG for the J1-J2 spin chain

J2/J1 = 0.5 is the AKLT point with

bond dimension 2 ground state

dmrg_table - DMRG sample code which takes an

external input file (inputfile_dmrg_table)

exthubbard - DMRG calculation for ground state of

extended Hubbard model

Uses inputfile_exthubbard for

input parameters

mixedspin - demo code showing how to make and use

a site set with alternating S=1/2 and

S=1 spins

trg - tensor renormalization group (TRG) algorithm

for computing properties of large 2D classical

stat mech systems

ctmrg - corner transfer matrix renormalization group (CTMRG) algorithm

for computing properties of large 2D classical

stat mech systems