000			01734 a2200217 4500
005			20190121165243.0
008			190114b xxu||||| |||| 00| 0 eng d
020			_a9783030018023
040			_cIIT Kanpur
041			_aeng
082			_a530.12 _bIa4m
100			_aIaizzi, Adam
245			_aMagnetic field effects in low-dimensional quantum magnets _cAdam Iaizzi
260			_bSpringer _c2018 _aSwitzerland
300			_axix, 156p
440			_aSpringer theses recognizing outstanding Ph. D. research
520			_aThis thesis is a tour-de-force combination of analytic and computational results clarifying and resolving important questions about the nature of quantum phase transitions in one- and two-dimensional magnetic systems. The author presents a comprehensive study of a low-dimensional spin-half quantum antiferromagnet (the J-Q model) in the presence of a magnetic field in both one and two dimensions, demonstrating the causes of metamagnetism in such systems and providing direct evidence of fractionalized excitations near the deconfined quantum critical point. In addition to describing significant new research results, this thesis also provides the non-expert with a clear understanding of the nature and importance of computational physics and its role in condensed matter physics as well as the nature of phase transitions, both classical and quantum. It also contains an elegant and detailed but accessible summary of the methods used in the thesis-exact diagonalization, Monte Carlo, quantum Monte Carlo and the stochastic series expansion-that will serve as a valuable pedagogical introduction to students beginning in this field.
650			_aQuantum theory
650			_aMagnetism
942			_cBK
999			_c560040 _d560040