2018/10/12 Quantum criticality under the influence of magnetic fields
類別:
專業性/professional
時間:
14時30分至15時30分
主辦單位:
量子科學與工程研究中心
演講地點:
CQSE(量子科學與工程研究中心) Seminar : CCMS & New Physics Building, NTU 臺大凝態大樓/物理新館 R716
演講者:
Adam Iaizzi
演講者職稱:
Dr.
服務單位:
Department of Physics, National Taiwan University 國立臺灣大學物理系
摘要:

Simple models of interacting quantum spins are a remarkable tools for studying quantum phase transitions and many-body states with strong quantum fluctuations, but relatively few studies have considered how external magnetic fields effect these systems. I investigate the influence of magnetic fields on a number of quantum critical points in a low-dimensional quantum antiferromagnet known as the J-Q model. Near saturation we observe a change from zero-scale-factor universality to metamagnetism as Q is increased. Separately, we investigate the effects of magnetic fields near the so-called deconfined quantum critical point where we show direct evidence of  Bose-Einstein condensation of deconfined spinons (S=1/2 bosons).

相關連結: http://cqse.ntu.edu.tw/cqse/index.html
建檔時間:
2018/10/09 13:13
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