Mikael Persson Sundqvist

Sökresultat

• 2025

  On the Laplace operator with a weak magnetic field in exterior domains

  Kachmar, A., Lotoreichik, V. & Sundqvist, M., 2025 feb., I: Analysis and Mathematical Physics. 15, 1, 5.

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  • Exterior Domain 100%
  • Laplace Operator 100%
  • Magnetic Field 100%
  • Eigenvalue 75%
  • Asymptotics 50%
• 2024

  Flux and symmetry effects on quantum tunneling

  Helffer, B., Kachmar, A. & Sundqvist, M. P., 2024, I: Mathematische Annalen. 390, 4, s. 5185-5234

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  Öppen tillgång

  • Constant 100%
  • Laplace Operator 100%
  • Triangle 66%
  • Approximation 33%
  • Neumann Boundary Condition 33%
• 2022

  Computing Nodal Deficiency with a Refined Dirichlet-to-Neumann Map

  Berkolaiko, G., Cox, G., Helffer, B. & Sundqvist, M. P., 2022 okt., I: Journal of Geometric Analysis. 32, 10, 246.

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  • Family 100%
  • Simple Eigenvalue 33%

• Spectral flow for pair compatible equipartitions

  Helffer, B. & Sundqvist, M. P., 2022, I: Communications in Partial Differential Equations. 47, 1, s. 169-196

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  Öppen tillgång

  • Partition 100%
  • Operators 20%
  • Eigenfunction 20%
  • Neumann Operator 20%
• 2021

  On an Integral Identity

  Bostan, A., Chamizo, F. & Sundqvist, M. P., 2021, I: American Mathematical Monthly. 128, 8, s. 737-743 7 s.

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  • Hypergeometric Function 100%
  • Number Theory 100%
• 2020

  Counterexample to Strong Diamagnetism for the Magnetic Robin Laplacian

  Kachmar, A. & Sundqvist, M. P., 2020, I: Mathematical Physics, Analysis and Geometry. 23, 3, 27.

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  Öppen tillgång

  • Counterexample 100%
  • Laplace Operator 100%
  • Asymptotics 50%
  • Robin Boundary Condition 50%
  • Eigenvalue 50%
• 2019

  On the semiclassical analysis of the ground state energy of the Dirichlet Pauli operator III: magnetic fields that change sign

  Helffer, B., Kovařík, H. & Sundqvist, M. P., 2019, I: Letters in Mathematical Physics. 109, 7, s. 1533-1558

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  • Change Sign 100%
  • State Energy 100%
  • Pauli Operator 100%
  • Bounds 25%
  • Asymptotics 25%

• The Distribution of Superconductivity Near a Magnetic Barrier

  Assaad, W., Kachmar, A. & Persson-Sundqvist, M., 2019, I: Communications in Mathematical Physics. 366, 1, s. 269-332

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  Öppen tillgång

  • Constant 100%
  • Piecewise 100%
  • Minimizing 100%
  • smooth curve γ 100%
  • Simply Connected Domain 100%
• 2017

  On the semi-classical analysis of the ground state energy of the Dirichlet Pauli operator

  Helffer, B. & Persson Sundqvist, M., 2017, I: Journal of Mathematical Analysis and Applications. 449, 1, s. 138–153

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  • State Energy 100%
  • Eigenvalue 100%
  • Pauli Operator 100%
  • Complete 50%
  • Brownian Motion 50%

• On the Semiclassical Analysis of the Ground State Energy of the Dirichlet Pauli Operator in Non-Simply Connected Domains

  Helffer, B. & Persson Sundqvist, M., 2017, I: Journal of Mathematical Sciences. s. 531–544 14 s.

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  • State Energy 100%
  • Pauli Operator 100%
  • Simply Connected Domain 100%
• 2016

  Band functions in the presence of magnetic steps

  Hislop, P. D., Popoff, N., Raymond, N. & Persson Sundqvist, M., 2016, I: Mathematical Models and Methods in Applied Sciences. 26, 1, s. 161

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  • Operators 100%
  • Essential Spectrum 66%
  • Edge 66%
  • Complete 33%
  • Constant 33%

• Clusters of eigenvalues for the magnetic Laplacian with Robin condition

  Goffeng, M., Kachmar, A. & Sundqvist, M. P., 2016, I: Journal of Mathematical Physics. 57, 6, 063510.

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  • Operators 100%
  • Eigenvalue 100%
  • Laplace Operator 100%
  • Boundary Condition 66%
  • Constant 33%

• On nodal domains in Euclidean balls

  Helffer, B. & Sundqvist, M. P., 2016, I: Proceedings of the American Mathematical Society. 144, 11, s. 4777-4791 15 s.

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  • Laplace Operator 100%
  • Eigenvalue 66%
  • Two Dimensions 33%
  • Piecewise 33%
  • Partition 33%
• 2015

  A uniqueness theorem for higher order anharmonic oscillators

  Fournais, S. & Persson Sundqvist, M., 2015, I: Journal of Spectral Theory. 5, 2, s. 235-249

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

• Lack of Diamagnetism and the Little-Parks Effect

  Fournais, S. & Persson Sundqvist, M., 2015, I: Communications in Mathematical Physics. 337, 1, s. 191-224

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  • Diamagnetism 100%
  • Mechanical Strength 100%
  • Superconductivity 50%
  • Operators 50%
  • Ground State Energy 33%

• Nodal domains in the square – the Neumann case

  Helffer, B. & Persson Sundqvist, M., 2015, I: Moscow Mathematical Journal. 15, 3, s. 455-495

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  • Eigenvalue 100%
  • Laplace Operator 100%
  • Finite Number 50%
  • Neumann Condition 50%
• 2013

  On the essential spectrum of magnetic Schrödinger operators in exterior domains

  Kachmar, A. & Persson Sundqvist, M., 2013, I: Arabic Journal of Mathematical Sciences. 19, 2, s. 217-222

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  Öppen tillgång

  • Operators 100%
  • Essential Spectrum 100%
  • Exterior Domain 100%

• The ground state energy of the three dimensional Ginzburg-Landau functional. Part II: Surface regime

  Fournais, S., Kachmar, A. & Persson Sundqvist, M., 2013, I: Journal des Mathématiques Pures et Appliquées. 99, 3, s. 343-374

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  • Superconductivity 100%
  • Surface 100%
  • Magnetic Field 40%
  • Region 40%
  • Model 20%
• 2011

  Strong diamagnetism form the ball in three dimensions

  Fournais, S. & Persson Sundqvist, M., 2011, I: Asymptotic Analysis. 72, 1-2, s. 77-123

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  • Three-Dimension 100%
  • Eigenvalue 66%
  • Asymptotic Formula 66%
  • Constant 33%
  • Large Value 33%

• Superconductivity between HC2 and HC3

  Helffer, B., Fournais, S. & Persson Sundqvist, M., 2011, I: Journal of Spectral Theory. 1, 3, s. 273-298

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  • Superconductivity 100%
  • Superconducting Material 50%
• 2010

  Spectral properties of higher order Anharmonic Oscillators

  Helffer, B. & Persson Sundqvist, M., 2010, I: Journal of Mathematical Sciences. 165, 1, s. 110-126

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  • Anharmonic Oscillator 100%
  • Spectral Property 100%
  • Unique Point 50%
• 2009

  A non-existence result for the Ginzburg-Landau equations

  Kachmar, A. & Persson Sundqvist, M., 2009, I: Comptes Rendus Mathématique. 347, 21-22, s. 1261-1264

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  • Class 100%
  • Existence Result 100%
  • Nonexistence 100%

• Eigenvalue asymptotics of the even-dimensional exterior Landau-Neumann Hamiltonian

  Persson Sundqvist, M., 2009, I: Advances in Mathematical Physics. 2009, 873704.

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  Öppen tillgång

  • Operators 100%
  • Constant 100%
  • Asymptotics 100%
  • Eigenvalue 100%
• 2008

  Zero modes for the magnetic Pauli operator in even-dimensional Euclidean space

  Persson Sundqvist, M., 2008, I: Letters in Mathematical Physics. 85, 2-3, s. 111-128

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  • Pauli Operator 100%
  • Dimensional Euclidean Space 100%
  • Bounds 25%
  • Number 25%
  • Scalar Potential 25%
• 2006

  On the Dirac and Pauli operators with several Aharonov-Bohm solenoids

  Persson Sundqvist, M., 2006, I: Letters in Mathematical Physics. 78, 2, s. 139-156

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  • Pauli Operator 100%
  • Operators 66%
  • Self-Adjoint 66%
  • Number 33%
  • Finite Number 33%
• 2005

  On the Aharonov-Casher formula for different self-adjoint extensions of the Pauli operator with singular magnetic field

  Persson Sundqvist, M., 2005, I: Electronic Journal of Differential Equations. 55, s. 1-16

  Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift › Peer review

  • Self-Adjoint 100%
  • Pauli Operator 100%
  • Operators 33%
  • Approximation 33%