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.
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
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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
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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
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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 ...
The magnetic moment of the muon is an important precision parameter for putting the Standard Model of particle physics to the test. After years of work, the research group led by Professor Hartmut Wittig of the PRISMA+ Cluster ...
General Physics
Dec 19, 2024
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Theoretical physicists have established a close connection between the two rapidly developing fields in theoretical physics, quantum information theory and non-invertible symmetries in particle and condensed matter theories, ...
Condensed Matter
Nov 29, 2024
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A new study published in Physical Review Letters (PRL) proposes using gravitational wave detectors like LIGO to search for scalar field dark matter.
An international team of researchers has found a surprisingly simple relationship between the rates of energy and information transmission across an interface connecting two quantum field theories. Their work was published ...
Quantum Physics
Sep 13, 2024
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