منابع مشابه
String-net condensation and topological phases in quantum spin systems
For many years, it was thought that Landau's theory of symmetry breaking could describe essentially all phases and phase transitions. However, in the last twenty years, it has become clear that at zero temperature, quantum mechanics allows for the possibility of new phases of matter beyond the Landau paradigm. In this thesis, we develop a general theoretical framework for these "exotic phases" ...
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{ A controversial issue in spin glass theory is whether mean eld correctly describes 3-dimensional spin glasses. If it does, how can replica symmetry breaking arise in terms of spin clusters in Euclidean space? Here we argue that there exist system-size low energy excitations that are \sponge-like", generating multiple valleys separated by diverging energy barriers. The droplet model should be ...
متن کاملSpin chains and string theory.
Recently, an important test of the anti de Sitter/conformal field theory correspondence has been done using rotating strings with two angular momenta. We show that such a test can be described more generally as the agreement between two actions: one a low energy description of a spin chain appearing in the field theory side, and the other a limit of the string action in AdS5xS5. This gives a ma...
متن کاملGeometrical properties of parafermionic spin models
We present measurements of the fractal dimensions associated to the spin clusters for Z4 and Z5 spin models. We also attempted to measure similar fractal dimensions for the generalised Fortuin Kastelyn (FK) clusters in these models but we discovered that these clusters do not percolate at the critical point of the model under consideration. These results clearly mark a difference in the behavio...
متن کاملString Theory and Quantum Spin Chains
The space-time light-cone hamiltonian P− of large-N matrix models for dynamical triangulations may be viewed as that of a quantum spin chain and analysed in a mean field approximation. As N → ∞, the properties of the groundstate as a function of the bare worldsheet cosmological constant exhibit a parton phase and a critical string phase, separated by a transition with non-trivial scaling at whi...
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ژورنال
عنوان ژورنال: Nuclear Physics B
سال: 1994
ISSN: 0550-3213
DOI: 10.1016/0550-3213(94)90003-5