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Quantum-probabilistic Hamiltonian learning for generative modeling and anomaly detection (2023)
Journal Article
Araz, J. Y., & Spannowsky, M. (2023). Quantum-probabilistic Hamiltonian learning for generative modeling and anomaly detection. Physical Review A, 108(6), Article 062422. https://doi.org/10.1103/physreva.108.062422

The Hamiltonian of an isolated quantum-mechanical system determines its dynamics and physical behavior. This study investigates the possibility of learning and utilizing a system's Hamiltonian and its variational thermal state estimation for data ana... Read More about Quantum-probabilistic Hamiltonian learning for generative modeling and anomaly detection.

FeynMG: A FeynRules extension for scalar-tensor theories of gravity (2023)
Journal Article
Sevillano Muñoz, S., Copeland, E. J., Millington, P., & Spannowsky, M. (2024). FeynMG: A FeynRules extension for scalar-tensor theories of gravity. Computer Physics Communications, 296, Article 109035. https://doi.org/10.1016/j.cpc.2023.109035

The ability to represent perturbative expansions of interacting quantum field theories in terms of simple diagrammatic rules has revolutionized calculations in particle physics (and elsewhere). Moreover, these rules are readily automated, a process t... Read More about FeynMG: A FeynRules extension for scalar-tensor theories of gravity.

Deuterium spectroscopy for enhanced bounds on physics beyond the standard model (2023)
Journal Article
Potvliege, R. M., Nicolson, A., Jones, M. P. A., & Spannowsky, M. (2023). Deuterium spectroscopy for enhanced bounds on physics beyond the standard model. Physical Review A, 108(5), Article 052825. https://doi.org/10.1103/physreva.108.052825

We consider the impact of combining precision spectroscopic measurements made in atomic hydrogen with similar measurements made in atomic deuterium on the search for physics beyond the standard model. Specifically, we consider the wide class of model... Read More about Deuterium spectroscopy for enhanced bounds on physics beyond the standard model.

Probing Poincaré violation (2023)
Journal Article
Gupta, R., Jaeckel, J., & Spannowsky, M. (2023). Probing Poincaré violation. Journal of High Energy Physics, 2023(11), 26. https://doi.org/10.1007/jhep11%282023%29026

Time and space translation invariance, giving rise to energy and momentum conservation, are not only amongst the most fundamental but also the most generally accepted symmetry assumptions in physics. It is nevertheless prudent to put such assumptions... Read More about Probing Poincaré violation.

Toward a quantum simulation of nonlinear sigma models with a topological term (2023)
Journal Article
Araz, J. Y., Schenk, S., & Spannowsky, M. (2023). Toward a quantum simulation of nonlinear sigma models with a topological term. Physical Review A, 107(3), https://doi.org/10.1103/physreva.107.032619

We determine the mass gap of a two-dimensional O(3) nonlinear sigma model augmented with a topological θ-term using tensor network and digital quantum algorithms. As proof of principle, we consider the example θ=π and study its critical behavior on a... Read More about Toward a quantum simulation of nonlinear sigma models with a topological term.

Effective limits on single scalar extensions in the light of recent LHC data (2023)
Journal Article
Anisha, Das Bakshi, S., Banerjee, S., Biekötter, A., Chakrabortty, J., Patra, S. K., & Spannowsky, M. (2023). Effective limits on single scalar extensions in the light of recent LHC data. Physical Review D, 107(5), Article 055028. https://doi.org/10.1103/physrevd.107.055028

In this paper, we work with 16 different single scalar particle extensions of the Standard Model. We present the sets of dimension-six effective operators and the associated Wilson coefficients as functions of model parameters after integrating out t... Read More about Effective limits on single scalar extensions in the light of recent LHC data.

Integrating out heavy scalars with modified equations of motion: Matching computation of dimension-eight SMEFT coefficients (2023)
Journal Article
Banerjee, U., Chakrabortty, J., Englert, C., Rahaman, S. U., & Spannowsky, M. (2023). Integrating out heavy scalars with modified equations of motion: Matching computation of dimension-eight SMEFT coefficients. Physical Review D, 107(5), Article 055007. https://doi.org/10.1103/physrevd.107.055007

The shift in focus towards searches for physics beyond the Standard Model employing model-independent effective field theory methods necessitates a rigorous approach to matching to guarantee the validity of the obtained results and constraints. The l... Read More about Integrating out heavy scalars with modified equations of motion: Matching computation of dimension-eight SMEFT coefficients.

Quantum fitting framework applied to effective field theories (2023)
Journal Article
Criado, J. C., Spannowsky, M., & Kogler, R. (2023). Quantum fitting framework applied to effective field theories. Physical Review D, 107(1), Article 015023. https://doi.org/10.1103/physrevd.107.015023

The use of experimental data to constrain the values of the Wilson coefficients of an effective field theory involves minimizing a χ2 function that may contain local minima. Classical optimization algorithms can become trapped in these minima, preven... Read More about Quantum fitting framework applied to effective field theories.