General quantum algorithms for Hamiltonian simulation with applications to a non-Abelian lattice gauge theory

Zohreh Davoudi1,2,3,4, Alexander F. Shaw1,3, and Jesse R. Stryker1,2,5

1Department of Physics, University of Maryland, College Park, MD 20742, USA
2Maryland Center for Fundamental Physics, University of Maryland, College Park, MD 20742, USA
3Joint Center for Quantum Information and Computer Science, National Institute of Standards and Technology and University of Maryland, College Park, MD 20742, USA
4The NSF Institute for Robust Quantum Simulation, University of Maryland, College Park, Maryland 20742, USA
5Physics Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA

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Abstract

With a focus on universal quantum computing for quantum simulation, and through the example of lattice gauge theories, we introduce rather general quantum algorithms that can efficiently simulate certain classes of interactions consisting of correlated changes in multiple (bosonic and fermionic) quantum numbers with non-trivial functional coefficients. In particular, we analyze diagonalization of Hamiltonian terms using a singular-value decomposition technique, and discuss how the achieved diagonal unitaries in the digitized time-evolution operator can be implemented. The lattice gauge theory studied is the SU(2) gauge theory in 1+1 dimensions coupled to one flavor of staggered fermions, for which a complete quantum-resource analysis within different computational models is presented. The algorithms are shown to be applicable to higher-dimensional theories as well as to other Abelian and non-Abelian gauge theories. The example chosen further demonstrates the importance of adopting efficient theoretical formulations: it is shown that an explicitly gauge-invariant formulation using loop, string, and hadron degrees of freedom simplifies the algorithms and lowers the cost compared with the standard formulations based on angular-momentum as well as the Schwinger-boson degrees of freedom. The loop-string-hadron formulation further retains the non-Abelian gauge symmetry despite the inexactness of the digitized simulation, without the need for costly controlled operations. Such theoretical and algorithmic considerations are likely to be essential in quantumly simulating other complex theories of relevance to nature.

Non-Abelian gauge theories describe strong and weak interactions in nature. Simulating dynamics of strongly-interacting matter starting from such underlying gauge-theory frameworks is an exciting application of quantum simulators and quantum computers. With a focus on digital quantum computation, we have analyzed, in depth, the resource requirements for evolving a system of fermionic matter coupled to non-Abelian gauge bosons in 1+1 spacetime dimensions. To this end, we have taken into account efficient choices of the model's representation for mapping to discrete degrees of freedom of the quantum computer, proposed wiser decomposition of time evolution operation into smaller operations by preserving as many symmetries of the model as possible, and kept track of the systematic uncertainties introduced by algorithmic approximations. This has led to complete algorithms with bounded errors, and concrete circuit constructions, for both near- and far-term era of quantum computing. Importantly, our general strategies, including the subalgorithms developed, are shown to be applicable to a larger class of physical models, including more complex gauge theories and beyond.

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[3] Saurabh V. Kadam, Aahiri Naskar, Indrakshi Raychowdhury, and Jesse R. Stryker, "Loop-string-hadron approach to SU(3) lattice Yang-Mills theory: Hilbert space of a trivalent vertex", Physical Review D 111 7, 074516 (2025).

[4] Zhiyao Li, Dorota M. Grabowska, and Martin J. Savage, "Sequency Hierarchy Truncation (SeqHT) for Adiabatic State Preparation and Time Evolution in Quantum Simulations", Quantum 9, 1865 (2025).

[5] Simone Romiti and Carsten Urbach, "Digitizing lattice gauge theories in the magnetic basis: reducing the breaking of the fundamental commutation relations", The European Physical Journal C 84 7, 708 (2024).

[6] Zohreh Davoudi, "Toward quantum computing gauge theories of nature", The European Physical Journal Special Topics (2026).

[7] Ali H. Z. Kavaki and Randy Lewis, "False vacuum decay in triamond lattice gauge theory", Physical Review D 112 1, 014502 (2025).

[8] Anthony N. Ciavarella and Christian W. Bauer, "Quantum Simulation of SU(3) Lattice Yang-Mills Theory at Leading Order in Large- Nc Expansion", Physical Review Letters 133 11, 111901 (2024).

[9] Diptarka Das, Lukas Ebner, Saurabh V. Kadam, Indrakshi Raychowdhury, Andreas Schäfer, and Xiaojun Yao, "Eigenstate thermalization in ( 1+1 )-dimensional SU(2) lattice gauge theory coupled with dynamical fermions", Physical Review D 113 7, 074514 (2026).

[10] Jesse R. Stryker, "Shearing approach to gauge-invariant Trotterization", Physical Review D 112 1, 014508 (2025).

[11] Andrei Alexandru, Paulo F. Bedaque, Andrea Carosso, Michael J. Cervia, Edison M. Murairi, and Andy Sheng, "Fuzzy gauge theory for quantum computers", Physical Review D 109 9, 094502 (2024).

[12] Victor Ale, Tommaso Rainaldi, Enrique Rico, Felix Ringer, and George Siopsis, "Simulating quantum electrodynamics in 2+1 dimensions with qubits and qumodes", Journal of High Energy Physics 2026 4, 122 (2026).

[13] Christopher F. Kane, Siddharth Hariprakash, Neel S. Modi, Michael Kreshchuk, and Christian W Bauer, "Block encoding bosons by signal processing", Quantum 9, 1747 (2025).

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[15] Weijie Du and James P. Vary, "Systematic input scheme for many-boson Hamiltonians with applications to the two-dimensional ϕ4 theory", Physical Review D 111 1, 016013 (2025).

[16] Pedro R. Nicácio Falcão, Poetri Sonya Tarabunga, Martina Frau, Emanuele Tirrito, Jakub Zakrzewski, and Marcello Dalmonte, "Nonstabilizerness in U(1) lattice gauge theory", Physical Review B 111 8, L081102 (2025).

[17] Praveen Balaji, Cianán Conefrey-Shinozaki, Patrick Draper, Jason K. Elhaderi, Drishti Gupta, Luis Hidalgo, Andrew Lytle, and Enrico Rinaldi, "Quantum circuits for SU(3) lattice gauge theory", Physical Review D 112 5, 054511 (2025).

[18] Christian W. Bauer, Zohreh Davoudi, Natalie Klco, and Martin J. Savage, "Quantum simulation of fundamental particles and forces", Nature Reviews Physics 5 7, 420 (2023).

[19] Zohreh Davoudi, Chung-Chun Hsieh, and Saurabh V. Kadam, "Scattering wave packets of hadrons in gauge theories: Preparation on a quantum computer", Quantum 8, 1520 (2024).

[20] Siddharth Hariprakash, Neel S. Modi, Michael Kreshchuk, Christopher F. Kane, and Christian W. Bauer, "Strategies for simulating the time evolution of Hamiltonian lattice field theories", Physical Review A 111 2, 022419 (2025).

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[22] Dorota M. Grabowska, Christopher F. Kane, and Christian W. Bauer, "Fully gauge-fixed SU(2) Hamiltonian for quantum simulations", Physical Review D 111 11, 114516 (2025).

[23] Michael Fromm, Lucas Katschke, Owe Philipsen, and Wolfgang Unger, "Quantum computational resources for lattice QCD in the strong-coupling limit", EPJ Quantum Technology 12 1, 92 (2025).

[24] Rabha W. Ibrahim, Dumitru Baleanu, and Soheil Salahshour, "Weighted Deformed Gram Matrices for Quantum‐Inspired Learning With Applications to Biomedical Signal Analysis", Engineering Reports 8 6, e70855 (2026).

[25] Arianna Crippa, Simone Romiti, Lena Funcke, Karl Jansen, Stefan Kühn, Paolo Stornati, and Carsten Urbach, "Towards determining the (2+1)-dimensional quantum electrodynamics running coupling with Monte Carlo and quantum computing methods", Communications Physics 8 1, 367 (2025).

[26] Henry Lamm, Ying-Ying Li, Jing Shu, Yi-Lin Wang, and Bin Xu, "Block encodings of discrete subgroups on a quantum computer", Physical Review D 110 5, 054505 (2024).

[27] Soorya Rethinasamy, Ethan Guo, Alexander Wei, Mark M Wilde, and Kristina D Launey, "Neutron–nucleus dynamics simulations for quantum computers", Quantum Science and Technology 11 1, 015052 (2026).

[28] Jacky Jiang, Natalie Klco, and Olivia Di Matteo, "Non-Abelian dynamics on a cube: Improving quantum compilation through qudit-based simulations", Physical Review D 112 7, 074512 (2025).

[29] Andrew Hardy, Priyanka Mukhopadhyay, M. Sohaib Alam, Robert Konik, Layla Hormozi, Eleanor Rieffel, Stuart Hadfield, João Barata, Raju Venugopalan, Dmitri E. Kharzeev, and Nathan Wiebe, "Scattering Processes from Quantum Simulation Algorithms for Scalar Field Theories", PRX Quantum 7 1, 010343 (2026).

[30] Erik J. Gustafson, Henry Lamm, and Felicity Lovelace, "Primitive quantum gates for an SU(2) discrete subgroup: Binary octahedral", Physical Review D 109 5, 054503 (2024).

[31] Alberto Di Meglio, Karl Jansen, Ivano Tavernelli, Constantia Alexandrou, Srinivasan Arunachalam, Christian W. Bauer, Kerstin Borras, Stefano Carrazza, Arianna Crippa, Vincent Croft, Roland de Putter, Andrea Delgado, Vedran Dunjko, Daniel J. Egger, Elias Fernández-Combarro, Elina Fuchs, Lena Funcke, Daniel González-Cuadra, Michele Grossi, Jad C. Halimeh, Zoë Holmes, Stefan Kühn, Denis Lacroix, Randy Lewis, Donatella Lucchesi, Miriam Lucio Martinez, Federico Meloni, Antonio Mezzacapo, Simone Montangero, Lento Nagano, Vincent R. Pascuzzi, Voica Radescu, Enrique Rico Ortega, Alessandro Roggero, Julian Schuhmacher, Joao Seixas, Pietro Silvi, Panagiotis Spentzouris, Francesco Tacchino, Kristan Temme, Koji Terashi, Jordi Tura, Cenk Tüysüz, Sofia Vallecorsa, Uwe-Jens Wiese, Shinjae Yoo, and Jinglei Zhang, "Quantum Computing for High-Energy Physics: State of the Art and Challenges", PRX Quantum 5 3, 037001 (2024).

[32] Benoît Assi and Henry Lamm, "Digitization and subduction of SU(N) gauge theories", Physical Review D 110 7, 074511 (2024).

[33] Raghav G. Jha, Felix Ringer, George Siopsis, and Shane Thompson, "Continuous-variable quantum computation of the O(3) model in 1+1 dimensions", Physical Review A 109 5, 052412 (2024).

[34] Kyle Lee, Francesco Turro, and Xiaojun Yao, "Quantum computing for energy correlators", Physical Review D 111 5, 054514 (2025).

[35] Giovanni Cataldi, Giuseppe Magnifico, Pietro Silvi, and Simone Montangero, "Simulating (2+1)D SU(2) Yang-Mills lattice gauge theory at finite density with tensor networks", Physical Review Research 6 3, 033057 (2024).

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[38] Chenyi Gu, Matthias Heinz, Oriel Kiss, and Thomas Papenbrock, "Toward scalable quantum computations of atomic nuclei", Physical Review C 113 3, 034321 (2026).

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[40] J. J. Gálvez-Viruet, Felipe J. Llanes-Estrada, and María Gómez-Rocha, "Preparations for quantum computing in hadron physics", International Journal of Modern Physics A 41 06, 2630003 (2026).

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[42] Victor Ale, Nora M. Bauer, Raghav G. Jha, Felix Ringer, and George Siopsis, "Quantum computation of SU(2) lattice gauge theory with continuous variables", Journal of High Energy Physics 2025 6, 84 (2025).

[43] Evan Budd, Adrien Florio, David Frenklakh, and Swagato Mukherjee, "Quantum dynamics of cosmological particle production: interacting quantum field theories with matrix product states", Journal of High Energy Physics 2026 4, 183 (2026).

[44] Navya Gupta, Christopher David White, and Zohreh Davoudi, "Euclidean-Monte-Carlo-informed ground-state preparation for quantum simulation of scalar field theory", Physical Review D 113 11, 114515 (2026).

[45] Timo Jakobs, Marco Garofalo, Tobias Hartung, Karl Jansen, Johann Ostmeyer, Dominik Rolfes, Simone Romiti, and Carsten Urbach, "Canonical momenta in digitized Su(2) lattice gauge theory: definition and free theory", The European Physical Journal C 83 7, 669 (2023).

[46] Christian W. Bauer, "Efficient use of quantum computers for collider physics", Journal of High Energy Physics 2025 11, 108 (2025).

[47] Jad C. Halimeh, Niklas Mueller, Johannes Knolle, Zlatko Papić, and Zohreh Davoudi, "Quantum simulation of out-of-equilibrium dynamics in gauge theories", arXiv:2509.03586, (2025).

[48] Alexander M. Dalzell, Sam McArdle, Mario Berta, Przemyslaw Bienias, Chi-Fang Chen, András Gilyén, Connor T. Hann, Michael J. Kastoryano, Emil T. Khabiboulline, Aleksander Kubica, Grant Salton, Samson Wang, and Fernando G. S. L. Brandão, "Quantum algorithms: A survey of applications and end-to-end complexities", arXiv:2310.03011, (2023).

[49] Daan Camps, Ermal Rrapaj, Katherine Klymko, Hyeongjin Kim, Kevin Gott, Siva Darbha, Jan Balewski, Brian Austin, and Nicholas J. Wright, "Quantum Computing Technology Roadmaps and Capability Assessment for Scientific Computing -- An analysis of use cases from the NERSC workload", arXiv:2509.09882, (2025).

[50] Sam McArdle, Alexander M. Dalzell, Aleksander Kubica, and Fernando G. S. L. Brandão, "The Fast for the Curious: How to accelerate fault-tolerant quantum applications", arXiv:2510.26078, (2025).

[51] Torsten V. Zache, Daniel González-Cuadra, and Peter Zoller, "Quantum and Classical Spin-Network Algorithms for q -Deformed Kogut-Susskind Gauge Theories", Physical Review Letters 131 17, 171902 (2023).

[52] Zong-Gang Mou and Bipasha Chakraborty, "Scalable quantum computation of Quantum Electrodynamics beyond one spatial dimension", arXiv:2510.27668, (2025).

[53] Lento Nagano, Aniruddha Bapat, and Christian W. Bauer, "Quench dynamics of the Schwinger model via variational quantum algorithms", Physical Review D 108 3, 034501 (2023).

[54] Berndt Müller and Xiaojun Yao, "Simple Hamiltonian for quantum simulation of strongly coupled (2 +1 )D SU(2) lattice gauge theory on a honeycomb lattice", Physical Review D 108 9, 094505 (2023).

[55] Zohreh Davoudi, Chung-Chun Hsieh, and Saurabh V. Kadam, "Quantum computation of hadron scattering in a lattice gauge theory", arXiv:2505.20408, (2025).

[56] Christopher Brown, Michael Spannowsky, Alexander Tapper, Simon Williams, and Ioannis Xiotidis, "Quantum Pathways for Charged Track Finding in High-Energy Collisions", arXiv:2311.00766, (2023).

[57] Manu Mathur and Atul Rathor, "Exact duality and local dynamics in SU(N) lattice gauge theory", Physical Review D 107 7, 074504 (2023).

[58] Kyle Lee, James Mulligan, Felix Ringer, and Xiaojun Yao, "Liouvillian dynamics of the open Schwinger model: String breaking and kinetic dissipation in a thermal medium", Physical Review D 108 9, 094518 (2023).

[59] Marco Rigobello, Giuseppe Magnifico, Pietro Silvi, and Simone Montangero, "Hadrons in (1+1)D Hamiltonian hardcore lattice QCD", arXiv:2308.04488, (2023).

[60] Xiaojun Yao, "SU(2) gauge theory in 2 +1 dimensions on a plaquette chain obeys the eigenstate thermalization hypothesis", Physical Review D 108 3, L031504 (2023).

[61] Irian D'Andrea, Christian W. Bauer, Dorota M. Grabowska, and Marat Freytsis, "New basis for Hamiltonian SU(2) simulations", Physical Review D 109 7, 074501 (2024).

[62] Tomoya Hayata and Yoshimasa Hidaka, "String-net formulation of Hamiltonian lattice Yang-Mills theories and quantum many-body scars in a nonabelian gauge theory", Journal of High Energy Physics 2023 9, 126 (2023).

[63] Anthony N. Ciavarella, "Quantum simulation of lattice QCD with improved Hamiltonians", Physical Review D 108 9, 094513 (2023).

[64] Christopher F. Kane, Siddharth Hariprakash, and Christian W. Bauer, "Obtaining continuum physics from dynamical simulations of Hamiltonian lattice gauge theories", arXiv:2506.16559, (2025).

[65] Henry Lamm, "Ether of Orbifolds", arXiv:2603.29091, (2026).

[66] Anthony N. Ciavarella, I. M. Burbano, and Christian W. Bauer, "Efficient Truncations of SU($N_c$) Lattice Gauge Theory for Quantum Simulation", arXiv:2503.11888, (2025).

[67] Saurabh V. Kadam, "Theoretical Developments in Lattice Gauge Theory for Applications in Double-beta Decay Processes and Quantum Simulation", arXiv:2312.00780, (2023).

[68] Masanori Hanada, Shunji Matsuura, Emanuele Mendicelli, and Enrico Rinaldi, "Exponential improvement in quantum simulations of bosons", arXiv:2505.02553, (2025).

[69] Niklas Mueller, Joseph A. Carolan, Andrew Connelly, Zohreh Davoudi, Eugene F. Dumitrescu, and Kübra Yeter-Aydeniz, "Quantum Computation of Dynamical Quantum Phase Transitions and Entanglement Tomography in a Lattice Gauge Theory", PRX Quantum 4 3, 030323 (2023).

[70] S. V. Kadam, I. Raychowdhury, and J. Stryker, "Loop-string-hadron formulation of an SU(3) gauge theory with dynamical quarks", The 39th International Symposium on Lattice Field Theory, 373 (2023).

[71] Giovanni Cataldi, "Hamiltonian Lattice Gauge Theories: emergent properties from Tensor Network methods", arXiv:2501.11115, (2025).

[72] Marco Garofalo, Tobias Hartung, Timo Jakobs, Karl Jansen, Johann Ostmeyer, Dominik Rolfes, Simone Romiti, and Carsten Urbach, "Testing the $\mathrm{SU}(2)$ lattice Hamiltonian built from $S_3$ partitionings", arXiv:2311.15926, (2023).

[73] Zoë Webb-Mack and Natalie Klco, "Deforming the Trail: Baseline Quantum Circuitry for $\text{SU(2)}_k$ Lattice Gauge Theory", arXiv:2605.15076, (2026).

[74] Georg Bergner, Masanori Hanada, and Emanuele Mendicelli, "Exponential speedup in quantum simulation of Kogut-Susskind Hamiltonian via orbifold lattice", arXiv:2506.00755, (2025).

[75] Saurabh V. Kadam, Aahiri Naskar, Indrakshi Raychowdhury, and Jesse R. Stryker, "Loop-string-hadron approach to SU(3) lattice Yang-Mills theory, II: Operator representation for the trivalent vertex", arXiv:2512.11796, (2025).

[76] Saurabh V. Kadam, Indrakshi Raychowdhury, and Jesse R. Stryker, "Loop-string-hadron formulation of an SU(3) gauge theory with dynamical quarks", Physical Review D 107 9, 094513 (2023).

[77] Henry Froland and Dorota M. Grabowska, "Measuring Non-Stabilizerness in an SU(2) Lattice Gauge Theory", arXiv:2606.14842, (2026).

[78] Fran Ilcic and Indrakshi Raychowdhury, "Physicality oracle for SU(3) Loop-String-Hadron dynamics: a digital quantum circuit", arXiv:2512.13035, (2025).

The above citations are from Crossref's cited-by service (last updated successfully 2026-08-10 02:33:02) and SAO/NASA ADS (last updated successfully 2026-08-10 02:33:10). The list may be incomplete as not all publishers provide suitable and complete citation data.