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Joint Seminar of Center for Quantum Science and Engineering (CQSE) and
NTU Department of Physics
Title: Systematic Effective Field Theory Investigation of Lightly Hole-Doped
Antiferromagnets.
Time: 3/6/2009 (Fri.) 2:30 PM~3:30 PM
Place: RM 111, New Physics Building
Speaker: Dr. Fu-Jiun Jiang
Institute of Theoretical Physics, University of Bern
Abstract:
Motivated by the baryon chiral perturbation theory for QCD, using the symmetries
as well as other relevant properties of the underlying microscopic t-J model, we
have constructed a low-energy effective field theory for the t-J model on the square
and honeycomb lattices. The effective field theory is universal and can make
model-independent predictions for the entire class of antiferromagnetic cuprates.
For example, We have used the resulting effective Lagrangian to investigate the
possible spiral phases in the lightly hole-doped antiferromagnets. Our results can be
verified in experiments. The principles behind this construction are simple but
general, and can be extended to other lattice geometries including the frustrated
lattices which are relevant to the real materials. Such extension, in particular the
possible applications of the nested cluster algorithm which is a promising solution to
the sign problem arising in the frustrated systems, will be discussed as well.
標題：
【 量 子 科 學 與 工 程 研 究 中 心 演 講 公 告 】 3/6 (Fri.) 邀 請 Dr.
Fu-Jiun Jiang, Institute of Theoretical Physics, University of Bern於 R111
演講，敬邀各位踴躍前往參加。
內文：
Time： Mar. 20, 2009（ Fri.） 2： 30 P.M.~3： 30 P.M.
Place： Rm. 111, CCMS & New Physics Building, NTU
Speaker： Dr. Fu-Jiun Jiang
Institute of Theoretical Physics, University of Bern
Title： Systematic Effective Field Theory Investigation of Lightly
Hole-Doped Antiferromagnets.