
arXiv: 1510.06353
Eigenfunctions in inhomogeneous media can have strong localization properties. Filoche and Mayboroda showed that the function u u solving ( − Δ + V ) u = 1 (-\Delta + V)u = 1 controls the behavior of eigenfunctions ( − Δ + V ) ϕ = λ ϕ (-\Delta + V)\phi = \lambda \phi via the inequality \[ | ϕ ( x ) | ≤ λ u ( x ) ‖ ϕ ‖ L ∞ . |\phi (x)| \leq \lambda u(x) \|\phi \|_{L^{\infty }}. \] This inequality has proven to be remarkably effective in predicting localization and recently Arnold, David, Jerison, Mayboroda and Filoche connected 1 / u 1/u to decay properties of eigenfunctions. We aim to clarify properties of the landscape: the main ingredient is a localized variation estimate obtained from writing ϕ ( x ) \phi (x) as an average over Brownian motion ω ( ⋅ ) \omega (\cdot ) started in x x \[ ϕ ( x ) = E x ( ϕ ( ω ( t ) ) e λ t − ∫ 0 t V ( ω ( z ) ) d z ) . \phi (x) = \mathbb {E}_{x}\left (\phi (\omega (t)) e^{\lambda t-\int _{0}^{t}{V(\omega (z))dz}} \right ). \] This variation estimate will guarantee that ϕ \phi has to change at least by a factor of 2 in a small ball, which implicitly creates a landscape whose relationship with 1 / u 1/u we discuss.
Asymptotic distributions of eigenvalues in context of PDEs, FOS: Physical sciences, Oscillation, zeros of solutions, mean value theorems, etc. in context of PDEs, Disordered Systems and Neural Networks (cond-mat.dis-nn), Mathematical Physics (math-ph), Condensed Matter - Disordered Systems and Neural Networks, localization, Mathematics - Spectral Theory, Schrödinger operator, Schrödinger equation, Laplacian eigenfunction, torsion function, FOS: Mathematics, Disordered systems (random Ising models, random Schrödinger operators, etc.) in equilibrium statistical mechanics, Spectral Theory (math.SP), Feynman-Kac, Mathematical Physics
Asymptotic distributions of eigenvalues in context of PDEs, FOS: Physical sciences, Oscillation, zeros of solutions, mean value theorems, etc. in context of PDEs, Disordered Systems and Neural Networks (cond-mat.dis-nn), Mathematical Physics (math-ph), Condensed Matter - Disordered Systems and Neural Networks, localization, Mathematics - Spectral Theory, Schrödinger operator, Schrödinger equation, Laplacian eigenfunction, torsion function, FOS: Mathematics, Disordered systems (random Ising models, random Schrödinger operators, etc.) in equilibrium statistical mechanics, Spectral Theory (math.SP), Feynman-Kac, Mathematical Physics
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 29 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Top 10% | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Top 10% | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Top 10% |
