Results 11 to 20 of about 21,993 (212)

Spectral continuity for aperiodic quantum systems I. General theory [PDF]

Journal of Functional Analysis, 2017
How does the spectrum of a Schrodinger operator vary if the corresponding geometry and dynamics change? Is it possible to define approximations of the spectrum of such operators by defining approximations of the underlying structures?
Siegfried Beckus, J. Bellissard, G. Nittis   +2 more
semanticscholar   +1 more source

Joint Spectra of Generators in Topological Algebras [PDF]

International Journal of Mathematics and Mathematical Sciences, 2007
Let𝒜be a complex topological algebra with unit 1 and𝒰a family of proper closed ideals in𝒜. For an arbitraryS⊂𝒜we define a globally defined joint spectrumσ𝒰(S)={(λs)s∈S∈ℂS  |  ∃ I  ∈𝒰(s−λs)∈I ∀s∈S}. We prove that forSgenerating𝒜the spectrumσ𝒰(S)can be identified with the set𝔐𝒰of continuous multiplicative functionalsfon𝒜such that kerf∈𝒰.
openaire   +2 more sources

Topology, hidden spectra and Bose-Einstein condensation on low-dimensional complex networks [PDF]

, 2001
Topological inhomogeneity gives rise to spectral anomalies that can induce Bose–Einstein condensation (BEC) in low-dimensional systems. These anomalies consist in energy regions composed of an infinite number of states with vanishing weight in the ...
R. Burioni, D. Cassi, A. Vezzani
semanticscholar   +1 more source

The factorization theory of Thom spectra and twisted nonabelian Poincaré duality [PDF]

Algebraic and Geometric Topology, 2016
We give a description of the factorization homology and $E_n$ topological Hochschild cohomology of Thom spectra arising from $n$-fold loop maps $f: A \to BO$, where $A = \Omega^n X$ is an $n$-fold loop space.
Inbar Klang
semanticscholar   +1 more source

Geometric origin of self-intersection points in non-Hermitian energy spectra [PDF]

Physical review B
Unlike Hermitian systems, non-Hermitian energy spectra under periodic boundary conditions can form closed loops in the complex energy plane, a phenomenon known as point gap topology.
Jinghui Pi, Chenyang Wang, Yong-Chun Liu, Yangqian Yan   +3 more
semanticscholar   +1 more source

Geometrical description and Faddeev-Jackiw quantization of electrical networks [PDF]

Quantum
In lumped-element electrical circuit theory, the problem of solving Maxwell's equations in the presence of media is reduced to two sets of equations, the constitutive equations encapsulating local geometry and dynamics of a confined energy density, and ...
A. Parra-Rodriguez, I. L. Egusquiza
doaj   +1 more source

Duality and topology [PDF]

, 2016
Mappings between models may be obtained by unitary transformations with preservation of the spectra but in general a change in the states. Non- canonical transformations in general also change the statistics of the operators involved.
P. Sacramento, V. Vieira
semanticscholar   +1 more source

PROBLEM OF SUPER-STRONG MAGNETIC FIELDS ON THE SUN: BRIEF CHRONOLOGY AND NEW OBSERVATIONAL DATA

Odessa Astronomical Publications, 2018
In this study we present the old and new observational data concerning the problem of extreme magnetic fields (  5 kG) in the Sun's atmosphere. We emphasize that the upper limit of the intensity of the magnetic field in the solar atmosphere is unknown ...
V. G. Lozitsky, V. B. Yurchyshyn, K. Ahn, H. Wang, N. I. Lozitska   +4 more
doaj   +1 more source

Distances in spaces of physical models: partition functions versus spectra

Letters in Mathematical Physics, 2017
We study the relation between convergence of partition functions (seen as general Dirichlet series) and convergence of spectra and their multiplicities.
G. Cornelissen, A. Kontogeorgis
semanticscholar   +2 more sources

Potential therapeutic targeting of BKCa channels in glioblastoma treatment

Molecular Oncology, EarlyView.
This review summarizes current insights into the role of BKCa and mitoBKCa channels in glioblastoma biology, their potential classification as oncochannels, and the emerging pharmacological strategies targeting these channels, emphasizing the translational challenges in developing BKCa‐directed therapies for glioblastoma treatment.
Kamila Maliszewska‐Olejniczak, Karolina Pytlak, Sandra Jaworowska, Bogusz Kulawiak, Piotr Bednarczyk   +4 more
wiley   +1 more source