Methoden vergleichen

	DMRG	EXAFS
Fachgebiet	Spektroskopie	Spektroskopie
Familie	Process / pipeline	Process / pipeline
Entstehungsjahr	1992	1971
Urheber	Steven White	Edward Stern
Typ	Computational method	Synchrotron technique
Wegweisende Quelle	White, S. R. (1992). Density matrix formulation for quantum renormalization groups. Physical Review Letters, 69(19), 2863-2866.	Sayers, D. E., Stern, E. A., & Lytle, F. W. (1971). New technique for investigating noncrystalline structures: Fourier analysis of the extended X-ray absorption fine structure. Physical Review Letters, 27(18), 1204-1207.
Aliasnamen	DMRG, density matrix renormalization, tensor network	EXAFS spectroscopy, X-ray absorption spectroscopy
Verwandt	3	3
Zusammenfassung	Density Matrix Renormalization Group (DMRG) is a powerful computational method for solving strongly correlated quantum systems, particularly one-dimensional lattice models and quantum chemistry problems. Introduced by White in 1992, DMRG uses a variational approach and tensor-network representation to efficiently describe quantum ground states and excitations, achieving numerical accuracy competitive with exact diagonalization for systems that other methods cannot treat.	Extended X-ray Absorption Fine Structure (EXAFS) is a synchrotron-based X-ray spectroscopy technique that measures the local geometric and electronic structure around a specific atom in any material, crystal or amorphous. Discovered by Sayers, Stern, and Lytle in 1971, EXAFS reveals interatomic distances, coordination numbers, and disorder in the atomic environment by analyzing oscillations in the X-ray absorption spectrum above an absorption edge.