منابع مشابه
Deconfined quantum critical points.
The theory of second-order phase transitions is one of the foundations of modern statistical mechanics and condensed-matter theory. A central concept is the observable order parameter, whose nonzero average value characterizes one or more phases. At large distances and long times, fluctuations of the order parameter(s) are described by a continuum field theory, and these dominate the physics ne...
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Groundstates of certain materials can support exotic excitations with a charge that’s a fraction of the fundamental electron charge. The condensation of these fractionalized particles has been predicted to drive novel quantum phase transitions, which haven’t yet been observed in realistic systems. Through numerical and theoretical analysis of a physical model of interacting lattice bosons, we e...
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The numerical renormalization group method is used to investigate zero temperature phase transitions in quantum impurity systems, in particular in the soft-gap Anderson model, where an impurity couples to a non-trivial fermionic bath. In this case, zero temperature phase transitions occur between two different phases whose fixed points can be built up of non-interacting single-particle states. ...
متن کاملTitle Unconventional Superconductivity and Antiferromagnetic Quantum Critical Behavior in the
Unconventional Superconductivity and Antiferromagnetic Quantum Critical Behavior in the Isovalent-Doped BaFe_{2}(As_{1-x}P_{x})_{2} Author(s) Nakai, Y.; Iye, T.; Kitagawa, S.; Ishida, K.; Ikeda, H.; Kasahara, S.; Shishido, H.; Shibauchi, T.; Matsuda, Y.; Terashima, T. Citation Physical Review Letters (2010), 105(10) Issue Date 2010-09 URL http://hdl.handle.net/2433/128772 Right © 2010 The Ameri...
متن کاملTopological Order and Conformal Quantum Critical Points
We discuss a certain class of two-dimensional quantum systems which exhibit conventional order and topological order, as well as two-dimensional quantum critical points separating these phases. All of the ground-state equal-time correlators of these theories are equal to correlation functions of a local two-dimensional classical model. The critical points therefore exhibit a time-independent fo...
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ژورنال
عنوان ژورنال: International Journal of Modern Physics B
سال: 2012
ISSN: 0217-9792,1793-6578
DOI: 10.1142/s0217979212300071