Extension technique for complete Bernstein functions of the Laplace operator

M Kwaśnicki, J Mucha - Journal of Evolution Equations, 2018 - Springer
We discuss the representation of certain functions of the Laplace operator Δ Δ as Dirichlet-to-
Neumann maps for appropriate elliptic operators in half-space. A classical result identifies …

Maximum Principles and Aleksandrov--Bakelman--Pucci Type Estimates for NonLocal Schrödinger Equations with Exterior Conditions

A Biswas, J Lörinczi - SIAM Journal on Mathematical Analysis, 2019 - SIAM
We consider Dirichlet exterior value problems related to a class of nonlocal Schrödinger
operators, whose kinetic terms are given in terms of Bernstein functions of the Laplacian. We …

[HTML][HTML] Universal constraints on the location of extrema of eigenfunctions of non-local Schrödinger operators

A Biswas, J Lőrinczi - Journal of Differential Equations, 2019 - Elsevier
We derive a lower bound on the location of global extrema of eigenfunctions for a large
class of non-local Schrödinger operators in convex domains under Dirichlet exterior …

Hopf's lemma for viscosity solutions to a class of non-local equations with applications

A Biswas, J Lőrinczi - Nonlinear Analysis, 2021 - Elsevier
We consider a large family of integro-differential equations and establish a non-local
counterpart of Hopf's lemma, directly expressed in terms of the symbol of the operator. As …

Zero-energy bound state decay for non-local Schrödinger operators

K Kaleta, J Lőrinczi - Communications in Mathematical Physics, 2020 - Springer
We consider solutions of the eigenvalue equation at zero energy for a class of non-local
Schrödinger operators with potentials decreasing to zero at infinity. Using a path integral …

Potentials for non-local Schrödinger operators with zero eigenvalues

G Ascione, J Lőrinczi - Journal of Differential Equations, 2022 - Elsevier
In this paper we propose a systematic description of potentials decaying to zero at infinity,
generating eigenvalues at the edge of the continuous spectrum when combined with non …

Bound states and heat kernels for fractional-type Schrödinger operators with singular potentials

T Jakubowski, K Kaleta, K Szczypkowski - … in Mathematical Physics, 2023 - Springer
We consider non-local Schrödinger operators H=-LV in L 2 (R d), d⩾ 1, where the kinetic
terms L are pseudo-differential operators which are perturbations of the fractional Laplacian …

[HTML][HTML] Spectral properties of the massless relativistic quartic oscillator

SO Durugo, J Lőrinczi - Journal of Differential Equations, 2018 - Elsevier
An explicit solution of the spectral problem of the non-local Schrödinger operator obtained
as the sum of the square root of the Laplacian and a quartic potential in one dimension is …

[HTML][HTML] Progressive intrinsic ultracontractivity and heat kernel estimates for non-local Schrödinger operators

K Kaleta, RL Schilling - Journal of Functional Analysis, 2020 - Elsevier
We study the long-time asymptotic behaviour of semigroups generated by non-local
Schrödinger operators of the form H=− L+ V; the free operator L is the generator of a …

Multifractal properties of sample paths of ground state-transformed jump processes

J Lőrinczi, X Yang - Chaos, Solitons & Fractals, 2019 - Elsevier
We consider a class of Lévy-type processes with unbounded coefficients, arising as Doob h-
transforms of Feynman-Kac type representations of non-local Schrödinger operators, where …