k-suzuki-jij / dmrg_c

dmrg_C

Archived programs for calculating one-dimensional models about condensed matter physics using density matrix renormalization group (DMRG) and exact diagonalization.

How to Use

First, you go enter dmrg_C/lib and do make

cd lib
make

If you use Linux systems, please comment out Mac OS clang commands

dmrg_C/lib/makefile

Lines 7 to 9 in afa53ab

	# Mac OS clang
	CC = gcc
	CFLAGS = -Wall -Wextra -Ofast -Xpreprocessor -fopenmp -I $(INCDIR)

and then uncomment Linux command.

dmrg_C/lib/makefile

Lines 11 to 13 in afa53ab

	# Linux
	#CC = gcc
	#CFLAGS = -Wall -Wextra -Ofast -fopenmp -I $(INCDIR)

We check the programes work on Ubuntu 20.04.5 LTS (GNU/Linux 5.15.0-56-generic x86_64)

Next, you go enter any directries under dmrg_C/main/dmrg. Here, we go enter dmrg_C/main/dmrg/xxz_vf and do make

cd dmrg_C/main/dmrg/xxz_vf
make

Again here, If you use Linux systems, please comment out Mac OS clang commands

dmrg_C/main/dmrg/xxz_vf/makefile

Lines 14 to 17 in afa53ab

	# Mac OS clang
	CC = gcc
	CFLAGS = -Ofast -Xpreprocessor -fopenmp -I $(INCDIR) -I include
	LFLAGS = -ldmrg -lonsite_op -lsml -llapack -lomp -L $(LIBDIR)

and then uncomment Linux command.

dmrg_C/main/dmrg/xxz_vf/makefile

Lines 19 to 22 in afa53ab

	# Linux
	#CC = gcc
	#CFLAGS = -Ofast -fopenmp -I $(INCDIR) -I include
	#LFLAGS = -ldmrg -lonsite_op -lsml -llapack -lm -L $(LIBDIR)

Finally, you can execute program appeared in dmrg_C/main/dmrg/xxz_vf/build/1D_XXZ_VF_DMRG.out

./build/1D_XXZ_VF_DMRG.out

Calculation log will be appeared.

Results will be written in dmrg_C/main/dmrg/xxz_vf/result and status will be written in dmrg_C/main/dmrg/xxz_vf/SML_out

Programs by DMRG

• dmrg_C/main/dmrg/hubbard_vf: Hubbard model under the longitudinal fields.
• dmrg_C/main/dmrg/klm_tvf: Kondo lattice model under the transeverse fields.
• dmrg_C/main/dmrg/klm_vf: Kondo lattice model under the longitudinal fields.
• dmrg_C/main/dmrg/tklm_vf: Two-channel Kondo lattice model under the longitudinal fields.
• dmrg_C/main/dmrg/xxz_vf: XXZ model under the longitudinal fields.

Programs by Exact Diagonalization

This is under construction. (maybe forever)

• dmrg_C/main/exact_diag/klm_tvf: Kondo lattice model under the transeverse fields.
• dmrg_C/main/exact_diag/klm_vf: Kondo lattice model under the longitudinal fields.

Operation Check

• Mac OS 13.1 on Apple M1 Max
• Mac OS 13.1 on Intel CPU
• Ubuntu 20.04.5 LTS on Ryzen 7950x