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math-ph2012★ 7 cited
Note on the spectrum of discrete Schrödinger operators
Fumio Hiroshima, Itaru Sasaki, Tomoyuki Shirai +1
The spectrum of discrete Schrödinger operator on the -dimensional lattice is considered, where denotes the discrete Laplacian and a delta function with mass at a s…
math-ph2012★ 3 cited
Enhanced Binding in Quantum Field Theory
Fumio Hiroshima, Itaru Sasaki, Herbert Spohn +1
This lecture note consists of three parts. Fundamental facts on Boson Fock space are introduced in Part I. Ref. 1.and 3. are reviewed in Part II and, Ref. 2. and 4. in Part III. In…