Tag

Feynman Diagrams

All articles tagged with #feynman diagrams

science2 months ago•5 min saved

Virtual Particles and the Foundation of Reality

Virtual particles are a mathematical tool used by physicists to calculate and predict the behavior of forces at the subatomic level, despite not being directly observable. They are essential for understanding interactions like electromagnetism and nuclear forces, and have led to highly accurate predictions, raising questions about their 'reality.' While some see them as useful fiction, their role in modern physics remains profound and indispensable.

via Space|

#feynman-diagrams #forces #quantum-physics

science5 months ago•5 min saved

Algebraic Geometry Unveils the Universe's Shape

Recent research explores how algebraic geometry and positive geometry can serve as a unifying language to understand phenomena from particle interactions to the large-scale structure of the universe, potentially revolutionizing our grasp of fundamental physics and cosmology.

via Phys.org|

#algebraic-geometry #cosmology #feynman-diagrams

science6 months ago•6 min saved

Physicists Solve Major Problem with New Algorithm

Caltech researchers have developed a new method to sum all Feynman diagrams for electron-lattice interactions, solving the long-standing polaron problem and enabling more accurate predictions of electron behavior in complex materials, with potential applications in quantum and electronic device design.

via SciTechDaily|

#electron-phonon-interaction #feynman-diagrams #monte-carlo

science6 months ago•6 min saved

Algorithm Solves One of Physics' Most Infamous Problems

Caltech scientists have developed a new, efficient method using diagrammatic Monte Carlo to sum all Feynman diagrams for complex electron-phonon interactions, solving a longstanding problem in physics and enabling better predictions of electron behavior in various materials, including quantum systems.

via ScienceDaily|

#electron-phonon-interactions #feynman-diagrams #materials-science

physics2 years ago•6 min saved

Unveiling the Secrets of Crystal Vibrations

Researchers have made progress towards a complete theory of electrons and phonons in crystals, which is crucial for understanding their optical properties, conductivity, and superconductivity. By combining tools from quantum field theory and Feynman diagrams, the team derived a set of equations that describe the interaction between electrons and phonons. They addressed several challenges, including formulating the problem correctly, generalizing the theory to systems out of equilibrium, and providing the first complete set of diagrammatic Hedin-Baym equations. These advancements will aid in parameter-free simulations and downfolding methods, benefiting various fields such as photovoltaics and light-matter interactions.

via Physics|

#computational-studies #crystal-vibrations #electron-phonon-interactions