About

I am an Associate Research Scientist – Software at the Center for Computational Quantum Physics of the Flatiron Institute in New York.

My research focus is the development of quantum Monte Carlo methods, in particular auxiliary-field quantum Monte Carlo, for application to lattice models, molecules and realistic materials. I am also interested in strong light-matter coupling in cavity QED.

Employment

2026 – present
Associate Research Scientist – Software Flatiron Institute New York, US
2022 – 2026
Postdoctoral Researcher Flatiron Institute New York, US
2022 – 2022
Postdoctoral Researcher Max Planck Institute for the Structure and Dynamics of Matter Hamburg, DE
2018 – 2022
Doctoral researcher within the DFG research training group RTG1995 RWTH Aachen University Aachen, DE

Funding

2022 – 2024
Cavity QED with two-dimensional quantum magnets Deutsche Forschungsgemeinschaft Bonn, DE

Education

2018 – 2022
PhD in Physics RWTH Aachen University Aachen, DE
2016 – 2018
M. Sc. Physics RWTH Aachen University Aachen, DE
2013 – 2016
B. Sc. Physics RWTH Aachen University Aachen, DE

Publications

  1. L. Weber, M. A. Morales, J. Flick, S. Zhang, and A. Rubio,
    Light-Matter Correlation Energy Functional of the Cavity-Coupled Two-Dimensional Electron Gas via Quantum Monte Carlo Simulations,
    Phys. Rev. Lett. 135, 126901 (2025)
  2. L. Weber, L. dos Anjos Cunha, M. A. Morales, A. Rubio, and S. Zhang,
    Phaseless Auxiliary-Field Quantum Monte Carlo Method for Cavity-QED Matter Systems,
    J. Chem. Theory Comput. 21, 2909-2917 (2025)
  3. L. Weber,
    Carlo.jl: A general framework for Monte Carlo simulations in Julia,
    SciPost Phys. Codebases , 49 (2025)
  4. L. Weber,
    Codebase release 0.2 for Carlo.jl,
    SciPost Phys. Codebases , 49-r0.2 (2025)
  5. L. Weber, E. Viñas Boström, M. Claassen, A. Rubio, and D. M. Kennes,
    Cavity-renormalized quantum criticality in a honeycomb bilayer antiferromagnet,
    Commun Phys 6, 247 (2023)
  6. L. Weber, A. Y. D. Fache, F. Mila, and S. Wessel,
    Thermal critical points from competing singlet formations in fully frustrated bilayer antiferromagnets,
    Phys. Rev. B 106, 235128 (2022)
  7. L. Weber, N. Caci, and S. Wessel,
    Cluster quantum Monte Carlo study of two-dimensional weakly coupled frustrated trimer antiferromagnets,
    Phys. Rev. B 106, 035141 (2022)
  8. A. Honecker, L. Weber, P. Corboz, F. Mila, and S. Wessel,
    Quantum Monte Carlo simulations of highly frustrated magnets in a cluster basis: The two-dimensional Shastry-Sutherland model,
    J. Phys.: Conf. Ser. 2207, 012032 (2022)
  9. L. Weber, A. Honecker, B. Normand, P. Corboz, F. Mila, and S. Wessel,
    Quantum Monte Carlo simulations in the trimer basis: first-order transitions and thermal critical points in frustrated trilayer magnets,
    SciPost Phys. 12, 054 (2022)
  10. N. Caci, L. Weber, and S. Wessel,
    Hierarchical single-ion anisotropies in spin-1 Heisenberg antiferromagnets on the honeycomb lattice,
    Phys. Rev. B 104, 155139 (2021)
  11. E. S. Klyushina, J. Reuther, L. Weber, A. T. M. N. Islam, J. S. Lord, B. Klemke, M. Månsson, S. Wessel, and B. Lake,
    Signatures for Berezinskii-Kosterlitz-Thouless critical behavior in the planar antiferromagnet BaNi2V2O8,
    Phys. Rev. B 104, 064402 (2021)
  12. J. L. Jiménez, S. P. G. Crone, E. Fogh, M. E. Zayed, R. Lortz, E. Pomjakushina, K. Conder, A. M. Läuchli, L. Weber, S. Wessel, A. Honecker, B. Normand, C. Rüegg, P. Corboz, H. M. Rønnow, and F. Mila,
    A quantum magnetic analogue to the critical point of water,
    Nature 592, 370-375 (2021)
  13. L. Weber and S. Wessel,
    Spin versus bond correlations along dangling edges of quantum critical magnets,
    Phys. Rev. B 103, L020406 (2021)
  14. A. M. Golubev, J. Nuss, R. K. Kremer, E. E. Gordon, M. Whangbo, C. Ritter, L. Weber, and S. Wessel,
    Two-dimensional magnetism in α−CuV2O6,
    Phys. Rev. B 102, 014436 (2020)
  15. E. Torres, L. Weber, L. Janssen, S. Wessel, and M. M. Scherer,
    Emergent symmetries and coexisting orders in Dirac fermion systems,
    Phys. Rev. Research 2, 022005 (2020)
  16. L. Weber and S. Wessel,
    Nonordinary criticality at the edges of planar spin-1 Heisenberg antiferromagnets,
    Phys. Rev. B 100, 054437 (2019)
  17. L. Weber, F. Parisen Toldin, and S. Wessel,
    Nonordinary edge criticality of two-dimensional quantum critical magnets,
    Phys. Rev. B 98, 140403 (2018)

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