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The Dirac equation for H$_2^+$ is solved numerically by expansion in a basis set of two-center exponential functions, using different kinetic balance schemes. Very high precision (27-32 digits) is achieved, either with the dual kinetic…

Atomic Physics · Physics 2023-05-10 Hugo D. Nogueira , Jean-Philippe Karr

In the general Two-Higgs Doublet Model it has been shown that the Higgs potential can be expressed in terms of gauge-independent quantities. In particular, stability, electroweak symmetry breaking, and CP symmetry can be understood in a…

High Energy Physics - Phenomenology · Physics 2022-12-28 Lohan Sartore , Markos Maniatis , Ingo Schienbein , Bjoern Herrmann

The effective quark models with quasilocal interaction are used for description of two composite Higgs doublets, in strong coupling (tricritical) regime below the compositeness scale \Lambda_{C}. The low energy effective action of Two-Higgs…

High Energy Physics - Phenomenology · Physics 2009-10-31 A. A. Andrianov , V. A. Andrianov , R. Rodenberg

The algebraic approach to operator perturbation method has been applied to two quantum--mechanical systems ``The Stark Effect in the Harmonic Oscillator'' and ``The Generalized Zeeman Effect''. To that end, two realizations of the…

Quantum Physics · Physics 2007-05-23 Ary W. Espinosa--Müller , Adelio R. Matamala Vásquez

Complex geometry represents a fundamental ingredient in the formulation of the Dirac equation by the Clifford algebra. The choice of appropriate complex geometries is strictly related to the geometric interpretation of the complex imaginary…

High Energy Physics - Theory · Physics 2016-09-06 S. De Leo , WA Rodrigues , J. Vaz

We present a relativistic third-order algebraic diagrammatic construction (ADC(3)) approach for calculating double ionization potentials (DIPs). By employing the exact two-component atomic mean-field (X2CAMF) Hamiltonian in combination with…

Chemical Physics · Physics 2025-10-08 Sujan Mandal , Achintya Kumar Dutta

We derive a general formula for two-loop counterterms in Effective Field Theories (EFTs) using a geometric approach. This formula allows the two-loop results of our previous paper to be applied to a wide range of theories. The two-loop…

High Energy Physics - Phenomenology · Physics 2023-11-13 Elizabeth E. Jenkins , Aneesh V. Manohar , Luca Naterop , Julie Pagès

Using the language of the Geometric Algebra, we recast the massive Dirac bispinor as a set of Lorentz scalar, vector, bivector, pseudovector, and pseudoscalar fields that obey a generalized form of Maxwell's equations of electromagnetism.…

Quantum Physics · Physics 2018-06-15 Anastasios Y. Papaioannou

We investigate Dirac's bra-ket formalism based on a rigged Hilbert space for a non-Hermite quantum system with a positive-definite metric. First, the rigged Hilbert space, characterized by positive-definite metric, is established. With the…

Mathematical Physics · Physics 2023-05-16 Shousuke Ohmori , Junichi Takahashi

We modify the construction of the spectral triple over an algebra of holonomy loops by introducing additional parameters in form of families of matrices. These matrices generalize the already constructed Euler-Dirac type operator over a…

High Energy Physics - Theory · Physics 2009-11-16 Johannes Aastrup , Jesper M. Grimstrup , Mario Paschke

It is shown that the eigenvalue problem for the hermitian Wilson-Dirac operator of for a uniform magnetic field in two dimensions can be reduced to one-dimensional problem described by a relativistic analog of the Harper equation. An…

High Energy Physics - Lattice · Physics 2009-11-07 H. Kurokawa , T. Fujiwara

The one-loop renormalization of the action for a set Dirac fermions and a set of scalars spanning an arbitrary manifold coupled via Yukawa-like and gauge interactions is presented. The computation is performed with functional methods and in…

High Energy Physics - Phenomenology · Physics 2018-02-21 R. Alonso , K. Kanshin , S. Saa

In this article we show in some detail how the full action functional of the standard model of elementary particle physics can be described within the geometrical setting of generalized Dirac operators. We thereby introduce a new model…

High Energy Physics - Theory · Physics 2009-10-30 Juergen Tolksdorf

Symmetries of the Two-Higgs-Doublet Model (2HDM) potential that can be extended to the whole Lagrangian, i.e. the CP-symmetries CP1, CP2, CP3 and the Higgs-family symmetries Z2, U(1) and SO(3) are discussed. Sufficient and necessary…

High Energy Physics - Phenomenology · Physics 2021-03-17 P. M. Ferreira , B. Grzadkowski , O. M. Ogreid , P. Osland

We present the Dirac Hamiltonian formalism for a pair of $1$-form fields with a topological-like potential coupled to first-order gravity in three-dimensional spacetime. By considering the complete phase space, we derive the full structure…

High Energy Physics - Theory · Physics 2026-01-13 Omar Rodríguez-Tzompantzi

Starting from the QCD Lagrangian and taking into account both perturbative and nonperturbative effects, we use the method of vacuum correlators to derive the Dirac equation (rigorously for the Coulomb interaction and heuristically for the…

High Energy Physics - Phenomenology · Physics 2009-09-25 V. D. Mur , V. S. Popov , Yu. A. Simonov , V. P. Yurov

We study the most popular scalar extension of the Standard Model, namely the Two Higgs doublet model, extended by a complex triplet scalar (2HDMcT). Such considering model with a very small vacuum expectation value, provides a solution to…

High Energy Physics - Phenomenology · Physics 2019-09-04 Brahim Ait Ouazghour , Abdesslam Arhrib , Rachid Benbrik , Mohamed Chabab , Larbi Rahili

We study the compatibility of the action of the DAHA of type GL with two inverse systems of polynomial rings obtained from the standard Laurent polynomial representations. In both cases, the crucial analysis is that of the compatibility of…

Quantum Algebra · Mathematics 2022-09-19 Bogdan Ion , Dongyu Wu

We review the motivation, construction and physical interpretation of a semi-finite spectral triple obtained through a rearrangement of central elements of loop quantum gravity. The triple is based on a countable set of oriented graphs and…

High Energy Physics - Theory · Physics 2009-08-05 Johannes Aastrup , Jesper M. Grimstrup , Ryszard Nest

The double-well problem for the two-dimensional Dirac equation is solved for a family of quasi-one-dimensional potentials in terms of confluent Heun functions. We demonstrate that for a double well separated by a barrier, both the energy…

Mesoscale and Nanoscale Physics · Physics 2021-01-01 R. R. Hartmann , M. E. Portnoi
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