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Dynamical Methods in One-Dimensional...
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Yessen, William Nicholas.
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Dynamical Methods in One-Dimensional Quasi-Periodic Lattice Models.
紀錄類型:
書目-語言資料,印刷品 : Monograph/item
正題名/作者:
Dynamical Methods in One-Dimensional Quasi-Periodic Lattice Models./
作者:
Yessen, William Nicholas.
面頁冊數:
158 p.
附註:
Source: Dissertation Abstracts International, Volume: 74-09(E), Section: B.
Contained By:
Dissertation Abstracts International74-09B(E).
標題:
Mathematics. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3562178
ISBN:
9781303097232
Dynamical Methods in One-Dimensional Quasi-Periodic Lattice Models.
Yessen, William Nicholas.
Dynamical Methods in One-Dimensional Quasi-Periodic Lattice Models.
- 158 p.
Source: Dissertation Abstracts International, Volume: 74-09(E), Section: B.
Thesis (Ph.D.)--University of California, Irvine, 2013.
Since the discovery by D. Shechtman in the early 1980's of the material that has become known as quasicrystal, mathematical models thereof have formed an active area of research. Quasicrystals are somewhat intermediate between crystals and amorphous matter (the former exhibiting periodic microscopic organization, while the latter does not exhibit any order at all). Quasicrystals possess a number of interesting properties, including quantum mechanical phenomena that had previously been regarded pathological. For this reason, mathematical models of quasicrystals and investigation thereof have occupied a center stage in mathematical physics (in particular in spectral theory) for the past thirty years. Some of the most widely research models of quasicrystals are the one-dimensional Schrodinger operator and the one-dimensional classical and quantum Ising models where, respectively, the potential and the neighbor interaction couplings are modulated by a sequence that is chosen to reflect the long-range (while still not periodic) order of the microscopic structure of the quasicrystals. In this dissertation we apply tools from ergodic theory and smooth and holomorphic dynamical systems to the spectral theory of one-dimensional classical and quantum Ising models and Jacobi operators (a generalization of the Schrodinger operator) on a one-dimensional quasi-periodic lattice, and Cantero-Moral-Velasquez matrices formed with a choice of quasi-periodic Verblunsky coefficients. We also present a canonical transformation from the quantum Ising model to the Jacobi operator (which has been known for a few decades) and from the classical Ising model to the Cantero-Moral-Velasquez matrix (which, to the best of our knowledge, is new). We model quasi-periodicity by the so-called Fibonacci substitution, though our methods can be generalized to a wider family of quasi-periodic sequences (this is discussed in some detail in the text). The highlight of this dissertation is a proof of multifractal structure of the spectrum of the aforementioned operators and investigation of its qualitative properties. By employing techniques from holomorphic dynamical systems, we also demonstrate rigorously absence of phase transitions of any order in the classical one-dimensional quasi-periodic nearest-neighbor Ising model with quasi-periodic magnetic field.
ISBN: 9781303097232Subjects--Topical Terms:
515831
Mathematics.
Dynamical Methods in One-Dimensional Quasi-Periodic Lattice Models.
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Since the discovery by D. Shechtman in the early 1980's of the material that has become known as quasicrystal, mathematical models thereof have formed an active area of research. Quasicrystals are somewhat intermediate between crystals and amorphous matter (the former exhibiting periodic microscopic organization, while the latter does not exhibit any order at all). Quasicrystals possess a number of interesting properties, including quantum mechanical phenomena that had previously been regarded pathological. For this reason, mathematical models of quasicrystals and investigation thereof have occupied a center stage in mathematical physics (in particular in spectral theory) for the past thirty years. Some of the most widely research models of quasicrystals are the one-dimensional Schrodinger operator and the one-dimensional classical and quantum Ising models where, respectively, the potential and the neighbor interaction couplings are modulated by a sequence that is chosen to reflect the long-range (while still not periodic) order of the microscopic structure of the quasicrystals. In this dissertation we apply tools from ergodic theory and smooth and holomorphic dynamical systems to the spectral theory of one-dimensional classical and quantum Ising models and Jacobi operators (a generalization of the Schrodinger operator) on a one-dimensional quasi-periodic lattice, and Cantero-Moral-Velasquez matrices formed with a choice of quasi-periodic Verblunsky coefficients. We also present a canonical transformation from the quantum Ising model to the Jacobi operator (which has been known for a few decades) and from the classical Ising model to the Cantero-Moral-Velasquez matrix (which, to the best of our knowledge, is new). We model quasi-periodicity by the so-called Fibonacci substitution, though our methods can be generalized to a wider family of quasi-periodic sequences (this is discussed in some detail in the text). The highlight of this dissertation is a proof of multifractal structure of the spectrum of the aforementioned operators and investigation of its qualitative properties. By employing techniques from holomorphic dynamical systems, we also demonstrate rigorously absence of phase transitions of any order in the classical one-dimensional quasi-periodic nearest-neighbor Ising model with quasi-periodic magnetic field.
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