Vol. 8, Issue 1, Part A (2026)

This study has a look at investigates quantum phase transitions (QPTs) in low-dimensional substances, focusing at the outcomes of disorder, electron interactions, and outside fields. Theoretical frameworks, which includes the Hubbard and Ising models, have been employed to analyze essential behaviors, at the same time as renormalization organization strategies furnished insights into scaling near quantum critical points. Experimental observations of conductivity below varying magnetic fields and ultra-low temperatures showed segment transitions between steel, insulating, and superconducting states. These findings were in addition verified via computational simulations using Density Functional Theory (DFT) and Quantum Monte Carlo (QMC) methods, which correctly mapped phase diagrams and important temperatures. The effects underscore the transformative potential of QPTs in quantum technologies, in particular in the development of solid qubits and green nanoelectronics gadgets. Future research will awareness on refining theoretical fashions, enhancing experimental setups, and exploring new quantum levels to increase quantum and nano technology.