Connection between Low Energy Effective Hamiltonians and Energy Level Statistics
نویسندگان
چکیده
منابع مشابه
An introduction to effective low-energy Hamiltonians in condensed matter physics and chemistry
After a brief introduction to second quantisation notation (section II), which is used extensively, I focus of the “four H’s”: the Hückel (or tight binding; section III), Hubbard (section IV), Heisenberg (section V) and Holstein (section VII) models. These models play central roles in our understanding of condensed matter, particularly for materials where electronic correlations are important, ...
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15 صفحه اولCoordinate noncommutativity as low energy effective dynamics
Abstract Coordinate noncommutativity, rather than being introduced through deformations of operator products, is achieved by coupling an auxiliary system with large energy excitations to the one of interest. Integrating out the auxiliary dynamics, or equivalently taking ground state expectation values, leads to the desired coordinate noncommutativity. The product responsible for this noncommuta...
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ژورنال
عنوان ژورنال: Physical Review Letters
سال: 1995
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.74.2050