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      RESEARCH INTERESTS:

  • Schrödinger perturbations of Markov processes, Feynman-Kac semigroups
  • Applications of probabilistic potential theory in mathematical physics
  • Spectral, analytic and ergodic properties of semigroups corresponding to Schrödinger operators
  • Approximation and estimates of semigroups (kernels) of jump Markov processes
  • Stochastic processes in random media, random Schrödinger operators, Poisson and Anderson model
  • Stochastic processes on fractals and graphs


      PREPRINTS:

  • K. Kaleta, R.L. Schilling
    Quasi-ergodicity of compact strong Feller semigroups on L^2 [arXiv]
    preprint 2023


     PUBLICATIONS:

  1. H. Balsam, K. Kaleta, M. Olszewski, K. Pietruska-Pałuba
    Density of states for the Anderson model on nested fractals [online]
    Analysis and Mathematical Physics 14, 2024, article 23
  2. M. Baraniewicz, K. Kaleta
    Integral kernels of Schrödinger semigroups with nonnegative locally bounded potentials [arXiv]
    Studia Mathematica, to appear
  3. T. Jakubowski, K. Kaleta, K. Szczypkowski
    Relativistic stable operators with critical potentials [online]
    Documenta Mathematica 29, no. 1, 2024, 209-245
  4. M. Baraniewicz, K. Kaleta
    Exponential densities and compound Poisson measures [online]
    Mathematische Nachrichten 296 (11), 2023, 5077-5108
  5. T. Jakubowski, K. Kaleta, K. Szczypkowski
    Bound states and heat kernels for fractional-type Schrödinger operators with singular potentials [online]
    Communications in Mathematical Physics 403, 2023, 795-828
  6. T. Grzywny, K. Kaleta, P. Sztonyk
    Heat kernels of non-local Schrödinger operators with Kato potentials [online]
    Journal of Differential Equations 340, 2022, 273-308
  7. W. Cygan, K. Kaleta, M. Śliwiński
    Decay of harmonic functions for discrete time Feynman--Kac operators with confining potentials [online]
    ALEA, Latin American Journal of Probability and Mathematical Statistics 19, 2022, 1071–1101
  8. K. Kaleta, D. Ponikowski
    On directional convolution equivalent densities [online]
    Electronic Journal of Probability 27, 2022, no. 65
  9. K. Kaleta, K. Pietruska-Pałuba
    Lifschitz tail for continuous Anderson models driven by Lévy operators [online]
    Communications in Contemporary Mathematics 23 (6), 2021, 2050065.
  10. K. Kaleta, R.L. Schilling
    Progressive intrinsic ultracontractivity and heat kernel estimates for non-local Schrödinger operators [online]
    Journal of Functional Analysis 279 (6), 2020, 108606.
  11. K. Kaleta, K. Pietruska-Pałuba
    Lifschitz tail for alloy-type models driven by the fractional Laplacian [online]
    Journal of Functional Analysis 279 (5), 2020, 108575.
  12. K. Kaleta, J. Lőrinczi
    Zero-energy bound state decay for nonlocal Schrödinger operators [online]
    Communications in Mathematical Physics 374, 2020, 2151–2191.
  13. K. Kaleta, J. Lőrinczi
    Typical long time behaviour of ground state-transformed jump processes [online]
    Communications in Contemporary Mathematics 22 (2), 2020, 1950002.
  14. K. Kaleta, M. Olszewski, K. Pietruska-Pałuba
    Reflected Brownian motion on simple nested fractals [online]
    Fractals: Complex Geometry, Patterns, and Scaling in Nature and Society 27 (6), 2019, 1950104.
  15. K. Kaleta, K. Pietruska-Pałuba
    The quenched asymptotics for nonlocal Schrödinger operators with Poissonian potentials [online]
    Potential Analysis 52, 2020, 161-202.
  16. K. Kaleta, P. Sztonyk
    Spatial asymptotics at infinity for heat kernels of pseudo-differential operators [online]
    Transactions of the American Mathematical Society 371, 2019, 6627-6663.
  17. K. Kaleta, K. Pietruska-Pałuba
    Lifschitz singularity for subordinate Brownian motions in presence of the Poissonian potential on the Sierpiński gasket [online]
    Stochastic Processes and their Applications 128 (11), 2018, 3897-3939.
  18. K. Kaleta, M. Kwaśnicki, J. Lőrinczi
    Contractivity and ground state domination properties for non-local Schrödinger operators [online]
    Journal of Spectral Theory 8 (1), 2018, 165-189.
  19. K. Kaleta, P. Sztonyk
    Small time sharp bounds for kernels of convolution semigroups [online]
    Journal d'Analyse Mathématique 132 (1), 2017, 355-394
  20. K. Kaleta, J. Lőrinczi
    Fall-off of eigenfunctions for nonlocal Schrödinger operators with decaying potentials [online]
    Potential Analysis 46 (4), 2017, 647-688
  21. K. Kaleta, M. Kwaśnicki, J. Małecki
    Asymptotic estimate of eigenvalues of pseudo-differential operators in an interval [online]
    Journal of Mathematical Analysis and Applications 439 (2), 2016, 896-924
  22. K. Kaleta, J. Lőrinczi
    Transition in the decay rates of stationary distributions of Lévy motion in an energy landscape [online]
    Physical Review E 93, 2016, 022135
  23. K. Kaleta, P. Sztonyk
    Estimates of transition densities and their derivatives for jump Lévy processes [online]
    Journal of Mathematical Analysis and Applications 431 (1), 2015, 260-282
  24. K. Kaleta, J. Lőrinczi
    Pointwise eigenfunction estimates and intrinsic ultracontractivity-type properties of Feynman-Kac semigroups for a class of Levy processes [online]
    Annals of Probability 43 (3), 2015, 1350-1398
  25. K. Kaleta, K. Pietruska-Pałuba
    Integrated density of states for Poisson-Schrödinger perturbations of subordinate Brownian motions on the Sierpiński gasket [online]
    Stochastic Processes and their Applications 125 (4), 2015, 1244-1281
  26. J. Lőrinczi, K. Kaleta, S. O. Durugo
    Spectral and Analytic Properties of Non-local Schrödinger Operators and Related Jump Processes [online]
    Communications in Applied and Industrial Mathematics 6 (2), 2014, 534
  27. K. Kaleta, M. Kwaśnicki, J. Małecki
    One-dimensional quasi-relativistic particle in the box [online]
    Reviews in Mathematical Physics 25 (8), 2013, 1350014
  28. K. Kaleta, P. Sztonyk
    Upper estimates of transition densities for stable dominated semigroups [online]
    Journal of Evolution Equations 13 (3), 2013, 633-650
  29. K. Kaleta, J. Lőrinczi
    Fractional P(\phi)_1 - processes and Gibbs measures [online]
    Stochastic Processes and their Applications 122 (10), 2012, 3580-3617
  30. K. Kaleta
    Spectral gap lower bound for the one-dimensional fractional Schrödinger operator in the interval [online]
    Studia Mathematica 209, 2012, 267-287
  31. K. Kaleta, T. Kulczycki
    Intrinsic ultracontractivity for Schrödinger operators based on fractional Laplacians [online]
    Potential Analysis 33 (4), 2010, 313-339
  32. K. Kaleta, M. Kwaśnicki
    Boundary Harnack Inequality for α-harmonic functions on the Sierpiński triangle [online]
    Probability and Mathematical Statistics 30 (2), 2010, 353-368


     THESES:

  • HABILITATION THESIS:
    Feynman-Kac semigroups of Lévy processes with direct jump property
    Wrocław University of Science and Technology, 2019
  • DOCTORAL DISSERTATION:
    Potential theory of fractional powers of Laplace operator and related Schrödinger operators
    Wrocław University of Technology, 2011, Supervisor: Prof. T. Kulczycki
  • MASTERS'S THESIS:
    Potential theory of α-stable motion on fractals (in polish) [pdf]
    Wrocław University of Technology, 2008, Supervisors: Prof. T. Byczkowski and Prof. M. Kwaśnicki



     RESEARCH PROJECTS (GRANTS):

  • National Science Centre (Poland) grant OPUS 2019/35/B/ST1/02421 (2020-2024)
    Levy processes and non-local Schrödinger operators
    Principal investigator: K. Kaleta
  • National Science Centre (Poland) grant SONATA BIS 2015/18/E/ST1/00239 (2016-2021)
    Inequalities and differential equations related to Markov operators
    Principal investigator: T. Jakubowski
  • National Science Centre (Poland) grant OPUS 2015/17/B/ST1/01233 (2016-2019)
    Properties of solutions to nonlocal equations
    Principal investigator: T. Kulczycki
  • National Science Centre (Poland) internship grant FUGA 2012/04/S/ST1/00093 (2012-2015)
    Jump Markov processes and their Schrödinger perturbations
    Principal investigator: K. Kaleta
  • National Science Centre (Poland) grant SONATA 2011/03/D/ST1/00311 (2012-2015)
    Spectral theory for Levy processes
    Principal investigator: M. Kwaśnicki
  • Ministry of Science and Higher Education (Poland) grant N N201 527338 (2010-2011)
    Potential theory for fractional powers of Laplacian and related Schrödinger operators
    Principal investigator: T. Kulczycki
  • Ministry of Science and Higher Education (Poland) grant N N201 373136 (2009-2012)
    Potential theory of a class of Levy processes and their Feynman-Kac semigroups
    Principal investigator: T. Byczkowski



     CONFERENCES:

  • ...will appear soon...