Department of Theoretical Physics

Research topics

• Quantum information
  geometry of quantum states, geometric measures of correlations, time evolution of chiral qubits, quasilinear evolution of quantum states, nonlinear evolution of quantum states and signaling, quantum information and black holes.
• Quantum state of the Higgs boson
  investigation of the quantum state of the Higgs boson inferred from its decays into weak vector bosons.
• Theory of open quantum systems
  quasilinear quantum operations, quasilinear extension of the quantum dynamical semigroup, theory of quantum measurement.
• Fundamental issues in relativistic quantum mechanics
  Lorentz-covariant description of relativistic Dirac and Majorana qubits, description of quantum mechanics in the presence of a preferred reference frame, relativistic Einstein-Podolsky-Rosen-Bohm-type quantum correlations, quantization on manifolds with nontrivial topology.
• Neutrino physics
  theory of the spacelike neutrino, quasilinear description of solar neutrino evolution, ultra-high-energy neutrinos.
• Phenomena in strong electromagnetic (laser) fields
  atomic excitation and ionization in laser electromagnetic fields.

Selected publications (2019–2026)

• Bernal, P. Caban, J. Rembieliński, "Entanglement and Bell inequality violation in vector diboson systems produced in decays of spin-0 particles", Scientific Reports 15, 23410 (2025). DOI: 10.1038/s41598-025-07747-3.
• J. Rembieliński, J. Ciborowski, "Reduction of ultra-high energy neutrino flux for spacelike neutrinos from extragalactic sources", Journal of High Energy Astrophysics 41, 81–88 (2024). DOI: 10.1016/j.jheap.2024.02.001.
• J. Barr, P. Caban, J. Rembieliński, "Bell-type inequalities for systems of relativistic vector bosons", Quantum 7, 1070 (2023). DOI: 10.22331/q-2023-07-27-1070.
• Bernal, P. Caban, J. Rembieliński, "Entanglement and Bell inequalities violation in H → ZZ with anomalous coupling", European Physical Journal C 83, 1050 (2023). DOI: 10.1140/epjc/s10052-023-12216-0.
• J. Rembieliński, J. Ciborowski, "On nonlinear description of neutrino flavour evolution in solar matter", Annals of Physics 458, 169481 (2023). DOI: 10.1016/j.aop.2023.169481.
• K. Kowalski, K. Ławniczak, "Wigner function for the quantum mechanics on a sphere", Annals of Physics 457, 169428 (2023). DOI: 10.1016/j.aop.2023.169428.
• Broda, "Fermionic model of unitary transport of qubits from a black hole", Physical Review D 103, 025022 (2021). DOI: 10.1103/PhysRevD.103.025022.
• J. Rembieliński, P. Caban, J. Ciborowski, "Quantum field theory of space-like neutrino", European Physical Journal C 81, 716 (2021). DOI: 10.1140/epjc/s10052-021-09494-x.
• J. Rembieliński, P. Caban, "Nonlinear extension of the quantum dynamical semigroup", Quantum 5, 420 (2021). DOI: 10.22331/q-2021-03-23-420.
• K. Kowalski, K. Ławniczak, "Wigner functions and coherent states for the quantum mechanics on a circle", Journal of Physics A: Mathematical and Theoretical 54, 275302 (2021). DOI: 10.1088/1751-8121/ac019d.
• K. Kowalski, "Linear and integrable nonlinear evolution of the qutrit", Quantum Information Processing 19, 145 (2020). DOI: 10.1007/s11128-020-02640-6.
• J. Rembieliński, P. Caban, "Nonlinear evolution and signaling", Physical Review Research 2, 012027(R) (2020). DOI: 10.1103/PhysRevResearch.2.012027.
• Z. Walczak, J. H. Bauer, "Measurement-induced geometric measures of correlations based on the trace distance for two-qubit X states", Quantum Information Processing 19, 190 (2020). DOI: 10.1007/s11128-020-02680-y.
• J. Ciborowski, J. Rembieliński, "Search for a preferred frame of the photon", Physical Review A 100, 032103 (2019). DOI: 10.1103/PhysRevA.100.032103.
• K. Kowalski, J. Rembieliński, "Integrable nonlinear evolution of the qubit", Annals of Physics 411, 167955 (2019). DOI: 10.1016/j.aop.2019.167955.
• J. Rembieliński, P. Caban, "Relativistic chiral qubits, their time evolution, and correlations", Physical Review A 99, 022320 (2019). DOI: 10.1103/PhysRevA.99.022320.

Research collaboration

(2019–2026)

• University of Oxford, United Kingdom (topic: quantum state of the Higgs boson).
• Universidad Autónoma de Madrid, Spain (topic: quantum state of the Higgs boson).
• Technion Haifa, Israel (topic: nonlinear quantum mechanics).
• University of Vienna, Austria (topic: relativistic information theory).
• Université Paris Diderot, Sorbonne Paris Cité, France (topic: coherent states for relativistic scalar particles).
• Technische Universität Darmstadt, Germany (topic: quantum spin correlations of relativistic electron pairs in Møller scattering).