Hugo Strand
Hugo Strand Position: Senior Lecturer School/office: School of Science and TechnologyEmail: aHVnby5zdHJhbmQ7b3J1LnNl
Phone: +46 19 303372
Room: T2202
Research subject
About Hugo Strand
Computational Physicist (Ph.D.) with a passion for numerical algorithms, software development, and high performance computing.
Teaching
- Introduction to MATLAB programming (https://github.com/HugoStrand/matlab-intro)
- Differential Equations
- Numerical Methods for Differential Equations
- Modelling and Numerical Simulation
Research
My research interest are many-body quantum systems in and out-of equilibrium and the development of numerical methods for their simulation on classical computers, with applications in condensed matter physics, quantum chemistry, and cold atoms.
Latest preprints (https://arxiv.org/a/strand_h_1.html)
Part of the group of excellence at Örebro University of the Wallenberg Initiative Materials Science for Sustainability (WISE) https://wise-materials.org/
Software
- QInchworm.jl A quasi Monte Carlo inchworm impurity solver for multi-orbital fermionic models (https://github.com/krivenko/QInchworm.jl)
- Toolbox for Research on Interacting Quantum Systems (TRIQS) (https://github.com/TRIQS/triqs)
- TPRF: the Two-Particle Response Function tool box for TRIQS (https://github.com/TRIQS/tprf)
- pydlr: Imaginary time calculations using the Discrete Lehmann Representation (DLR) (https://pypi.org/project/pydlr/)
- cppdlr: Imaginary time calculations using the discrete Lehmann representation (https://github.com/flatironinstitute/cppdlr)
- The Non-Equilibrium Systems Simulation (NESSi) package (https://github.com/nessi-cntr/nessi)
Research projects
Active projects
Research groups
Publications
Articles in journals |
Doctoral theses, monographs |
Articles in journals
- Kaye, J. , Strand, H. U. R. & Wentzell, N. (2024). cppdlr: Imaginary time calculations using the discrete Lehmann representation. Journal of Open Source Software, 9 (100). [BibTeX]
- Kaye, J. , Huang, Z. , Strand, H. U. R. & Golež, D. (2024). Decomposing Imaginary-Time Feynman Diagrams Using Separable Basis Functions: Anderson Impurity Model Strong-Coupling Expansion. Physical Review X, 14 (3). [BibTeX]
- van Loon, E. G. C. P. & Strand, H. U. R. (2024). Dual Bethe-Salpeter equation for the multiorbital lattice susceptibility within dynamical mean-field theory. Physical Review B, 109 (15). [BibTeX]
- Strand, H. U. R. , Kleinhenz, J. & Krivenko, I. (2024). Inchworm quasi Monte Carlo for quantum impurities. Physical Review B, 110 (12). [BibTeX]
- Strand, H. U. R. , Verdozzi, C. & Bonitz, M. (2024). Progress in Non-equilibrium Green's Functions VIII (PNGF VIII). Physica status solidi. B, Basic research, 261 (9). [BibTeX]
- Kaye, J. & Strand, H. U. R. (2023). A fast time domain solver for the equilibrium Dyson equation. Advances in Computational Mathematics, 49 (4). [BibTeX]
- Suzuki, H. , Wang, L. , Bertinshaw, J. , Strand, H. U. R. , Käser, S. , Krautloher, M. , Yang, Z. , Wentzell, N. & et al. (2023). Distinct spin and orbital dynamics in Sr2RuO4. Nature Communications, 14 (1). [BibTeX]
- van Loon, E. G. C. P. & Strand, H. U. R. (2023). Larmor precession in strongly correlated itinerant electron systems. Communications Physics, 6 (1). [BibTeX]
- Dong, X. , Gull, E. & Strand, H. (2022). Excitations and spectra from equilibrium real-time Green?s functions. Physical Review B, 106 (12). [BibTeX]
- Käser, S. , Strand, H. U. R. , Wentzell, N. , Georges, A. , Parcollet, O. & Hansmann, P. (2022). Interorbital singlet pairing in Sr2RuO4: A Hund's superconductor. Physical Review B, 105 (15). [BibTeX]
- Kaye, J. , Chen, K. & Strand, H. U. R. (2022). libdlr: Efficient imaginary time calculations using the discrete Lehmann representation. Computer Physics Communications, 280. [BibTeX]
- Dong, X. , Zgid, D. , Gull, E. & Strand, H. (2020). Legendre-spectral Dyson equation solver with super-exponential convergence. Journal of Chemical Physics, 152 (13). [BibTeX]
- Schüler, M. , Golez, D. , Murakami, Y. , Bittner, N. , Herrmann, A. , Strand, H. , Werner, P. & Eckstein, M. (2020). NESSi: The Non-Equilibrium Systems Simulation package. Computer Physics Communications, 257. [BibTeX]
- Ardizzone, I. , Zingl, M. , Teyssier, J. , Strand, H. , Peil, O. , Fowlie, J. , Georgescu, A. B. , Catalano, S. & et al. (2020). Optical properties of LaNiO3 films tuned from compressive to tensile strain. Physical Review B, 102 (15). [BibTeX]
- Kugler, F. B. , Zingl, M. , Strand, H. , Lee, S. B. , von Delft, J. & Georges, A. (2020). Strongly Correlated Materials from a Numerical Renormalization Group Perspective: How the Fermi-Liquid State of Sr2RuO4 Emerges. Physical Review Letters, 124 (1). [BibTeX]
- Sayyad, S. , Žitko, R. , Strand, H. , Werner, P. & Golež, D. (2019). Comparative study of nonequilibrium insulator-to-metal transitions in electron-phonon systems. Physical Review B, 99 (4). [BibTeX]
- Tamai, A. , Zingl, M. , Rozbicki, E. , Cappelli, E. , Riccò, S. , de la Torre, A. , McKeown Walker, S. , Bruno, F. & et al. (2019). High-Resolution Photoemission on Sr2RuO4 Reveals Correlation-Enhanced Effective Spin-Orbit Coupling and Dominantly Local Self-Energies. Physical Review X, 9 (2). [BibTeX]
- Strand, H. , Zingl, M. , Wentzell, N. , Parcollet, O. & Georges, A. (2019). Magnetic response of Sr2RuO4: quasi-local spin fluctuations due to Hund’s coupling. Physical Review B. Condensed Matter and Materials Physics, 100 (12). [BibTeX]
- Bittner, N. , Golež, D. , Strand, H. , Eckstein, M. & Werner, P. (2018). Coupled charge and spin dynamics in a photo-excited Mott insulator. Physical Review B, 97 (23). [BibTeX]
- Werner, P. , Strand, H. , Hoshino, S. , Murakami, Y. & Eckstein, M. (2018). Enhanced pairing susceptibility in a photo-doped two-orbital Hubbard model. Physical Review B. Condensed Matter and Materials Physics, 97 (16). [BibTeX]
- Hügel, D. , Strand, H. & Pollet, L. (2018). Self-energy functional theory with symmetry breaking for disordered lattice bosons. Quantum Science and Technology, 3 (3). [BibTeX]
- Li, J. , Strand, H. , Werner, P. & Eckstein, M. (2018). Theory of photoinduced ultrafast switching to a spin-orbital ordered hidden phase. Nature Communications, 9. [BibTeX]
- Ligges, M. , Avigo, I. , Golež, D. , Strand, H. , Stojchevska, L. , Kalläne, M. , Zhou, P. , Rossnagel, K. & et al. (2018). Ultrafast doublon dynamics in photo-excited 1T-TaS2. Physical Review Letters, 120 (16). [BibTeX]
- Hügel, D. , Strand, H. , Werner, P. & Pollet, L. (2017). Anisotropic Harper-Hofstadter-Mott model: Competition between condensation and magnetic fields. Physical Review B, 96 (5). [BibTeX]
- Strand, H. , Golež, D. , Eckstein, M. & Werner, P. (2017). Hund's coupling driven photocarrier relaxation in the two-band Mott insulator. Physical Review B, 96 (16). [BibTeX]
- Golež, D. , Boehnke, L. , Strand, H. , Eckstein, M. & Werner, P. (2017). Nonequilibrium GW+EDMFT: Antiscreening and inverted populations from nonlocal correlations. Physical Review Letters, 118 (24). [BibTeX]
- Werner, P. , Strand, H. , Hoshino, S. & Eckstein, M. (2017). Ultrafast switching of composite order in A(3)C(60). Physical Review B, 95 (19). [BibTeX]
- Hügel, D. , Werner, P. , Pollet, L. & Strand, H. (2016). Bosonic self-energy functional theory. Physical Review B, 94 (19). [BibTeX]
- Strand, H. , Eckstein, M. & Werner, P. (2015). Beyond the Hubbard bands in strongly correlated lattice bosons. Physical Review A. Atomic, Molecular, and Optical Physics, 92 (6). [BibTeX]
- Strand, H. , Eckstein, M. & Werner, P. (2015). Nonequilibrium Dynamical Mean-Field Theory for Bosonic Lattice Models. Physical Review X, 5 (1). [BibTeX]
- Lanatà, N. , Strand, H. , Yao, Y. & Kotliar, G. (2014). Principle of maximum entanglement entropy and local physics of strongly correlated materials. Physical Review Letters, 113 (3). [BibTeX]
- Strand, H. (2014). Valence-skipping and negative-U in the d-band from repulsive local Coulomb interaction. Physical Review B, 90 (15). [BibTeX]
- Lanatà, N. , Strand, H. , Giovannetti, G. , Hellsing, B. , De'Medici, L. & Capone, M. (2013). Orbital Selectivity in Hund's metals: The Iron Chalcogenides. Physical Review B. Condensed Matter and Materials Physics, 87 (4). [BibTeX]
- Granath, M. , Sabashvili, A. , Strand, H. & Östlund, S. (2012). Discretized thermal Green’s functions. Annalen der Physik, 524 (3-4), 147-152. [BibTeX]
- Granath, M. & Strand, H. (2012). Distributional exact diagonalization formalism for quantum impurity models. Physical Review B, 86 (11). [BibTeX]
- Lanatà, N. , Strand, H. , Dai, X. & Hellsing, B. (2012). Efficient implementation of the Gutzwiller variational method. Physical Review B, 85 (3). [BibTeX]
- Lanatà, N. & Strand, H. (2012). Time-Dependent and Steady-State Gutzwiller approach for nonequilibrium transport in nanostructures. Physical Review B. Condensed Matter and Materials Physics, 86 (11). [BibTeX]
- Strand, H. , Sabashvili, A. , Granath, M. , Hellsing, B. & Östlund, S. (2011). Dynamical mean field theory phase-space extension and critical properties of the finite temperature Mott transition. Physical Review B, 83 (20). [BibTeX]
Doctoral theses, monographs
- Strand, H. (2013). Correlated materials: models and methods. (Doctoral dissertation). Göteborg: Department of Physics, University of Gothenburg. [BibTeX]