Quantum field theory (QFT) is a research area in theoretical physics that formulates fundamental interactions in terms of quantized fields defined over spacetime, unifying special relativity and quantum mechanics. It treats particles as excitations of underlying fields and employs operator- or path-integral-based frameworks to compute scattering amplitudes, correlation functions, and vacuum structure. QFT underpins the Standard Model of particle physics, gauge theories, and renormalization methods, and provides the language for describing phenomena such as spontaneous symmetry breaking, anomalies, and topological phases. Research in QFT also interfaces with quantum gravity, conformal field theory, and nonperturbative techniques such as lattice formulations and bootstrap approaches.
Using advanced computational modeling, a research team led by the University of Oxford, working in partnership with the Instituto Superior Técnico at the University of Lisbon, has achieved the first-ever real-time, three-dimensional ...
General Physics
Jun 5, 2025
0
90
An international team led by Innsbruck quantum physicist Peter Zoller, together with the US company QuEra Computing, has directly observed a gauge field theory similar to models from particle physics in a two-dimensional ...
Quantum Physics
Jun 4, 2025
0
31
At long last, a unified theory combining gravity with the other fundamental forces—electromagnetism and the strong and weak nuclear forces—is within reach. Bringing gravity into the fold has been the goal of generations ...
General Physics
May 5, 2025
7
812
Highly charged heavy ions form a very suitable experimental field for investigating quantum electrodynamics (QED), the best-tested theory in physics describing all electrical and magnetic interactions of light and matter. ...
General Physics
Mar 26, 2025
0
23
The standard model of particle physics is our best theory of the elementary particles and forces that make up our world: particles and antiparticles, such as electrons and positrons, are described as quantum fields. They ...
Quantum Physics
Mar 25, 2025
0
158
In a new study published in Physical Review D, Professor Ginestra Bianconi, Professor of Applied Mathematics at Queen Mary University of London, proposes a new framework that could revolutionize our understanding of gravity ...
General Physics
Mar 4, 2025
8
629
The Standard Model (SM), the main physics framework describing elementary particles and the forces driving them, outlines key patterns in physical interactions referred to as gauge symmetries. One of the symmetries it describes ...
A new study published in Scientific Reports simulates particle creation in an expanding universe using IBM quantum computers, demonstrating the digital quantum simulation of quantum field theory for curved spacetime (QFTCS).
Quantum physics is a very diverse field: it describes particle collisions shortly after the Big Bang as well as electrons in solid materials or atoms far out in space. But not all quantum objects are equally easy to study. ...
Quantum Physics
Jan 7, 2025
0
179
When quantum electrodynamics, the quantum field theory of electrons and photons, was being developed after World War II, one of the major challenges for theorists was calculating a value for the Lamb shift, the energy of ...
