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Quantum Phases And Phase Transitions In Designer Spin Models, Nisheeta Desai
Quantum Phases And Phase Transitions In Designer Spin Models, Nisheeta Desai
Theses and Dissertations--Physics and Astronomy
This work focuses on numerical studies of quantum spin systems. These simple models are known to exhibit a variety of phases, some of which have no classical counterpart. Phase transitions between them are driven by quantum fluctuations and the unconventional nature of some such transitions make them a fascinating avenue of study.
Quantum Monte Carlo (QMC) is an indispensable tool in the study of these phases and phase transitions in two and higher dimensions. Nevertheless, we are limited by our inability to simulate models that suffer from the infamous sign problem. While the case of S=1/2 has been studied …