The Landau Hamiltonian with delta-potentials supported on curves

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F20%3A00524523" target="_blank" >RIV/61389005:_____/20:00524523 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1142/S0129055X20500105" target="_blank" >https://doi.org/10.1142/S0129055X20500105</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1142/S0129055X20500105" target="_blank" >10.1142/S0129055X20500105</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The Landau Hamiltonian with delta-potentials supported on curves

Popis výsledku v původním jazyce

The spectral properties of the singularly perturbed self-adjoint Landau Hamiltonian A(alpha) = (i del + A)(2) + alpha delta(Sigma) in L-2(R-2) with a delta-potential supported on a finite C-1,C-1-smooth curve Sigma are studied. Here A = 1/2 B(-x(2), x(1))(T) is the vector potential, B > 0 is the strength of the homogeneous magnetic field, and alpha is an element of L-infinity(Sigma) is a position-dependent real coefficient modeling the strength of the singular interaction on the curve Sigma. After a general discussion of the qualitative spectral properties of A(alpha) and its resolvent, one of the main objectives in the present paper is a local spectral analysis of A(alpha) near the Landau levels B(2q + 1), q is an element of N-0. Under various conditions on alpha, it is shown that the perturbation smears the Landau levels into eigenvalue clusters, and the accumulation rate of the eigenvalues within these clusters is determined in terms of the capacity of the support of alpha. Furthermore, the use of Landau Hamiltonians with delta-perturbations as model operators for more realistic quantum systems is justified by showing that A(alpha) can be approximated in the norm resolvent sense by a family of Landau Hamiltonians with suitably scaled regular potentials.

Název v anglickém jazyce

The Landau Hamiltonian with delta-potentials supported on curves

Popis výsledku anglicky

The spectral properties of the singularly perturbed self-adjoint Landau Hamiltonian A(alpha) = (i del + A)(2) + alpha delta(Sigma) in L-2(R-2) with a delta-potential supported on a finite C-1,C-1-smooth curve Sigma are studied. Here A = 1/2 B(-x(2), x(1))(T) is the vector potential, B > 0 is the strength of the homogeneous magnetic field, and alpha is an element of L-infinity(Sigma) is a position-dependent real coefficient modeling the strength of the singular interaction on the curve Sigma. After a general discussion of the qualitative spectral properties of A(alpha) and its resolvent, one of the main objectives in the present paper is a local spectral analysis of A(alpha) near the Landau levels B(2q + 1), q is an element of N-0. Under various conditions on alpha, it is shown that the perturbation smears the Landau levels into eigenvalue clusters, and the accumulation rate of the eigenvalues within these clusters is determined in terms of the capacity of the support of alpha. Furthermore, the use of Landau Hamiltonians with delta-perturbations as model operators for more realistic quantum systems is justified by showing that A(alpha) can be approximated in the norm resolvent sense by a family of Landau Hamiltonians with suitably scaled regular potentials.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10301 - Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Reviews in Mathematical Physics

ISSN

0129-055X

e-ISSN

—

Svazek periodika

32

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

SG - Singapurská republika

Počet stran výsledku

51

Strana od-do

2050010

Kód UT WoS článku

000531487500002

EID výsledku v databázi Scopus

2-s2.0-85073877359