Quantum field theory (QFT) is the basis of the Standard Model of particle physics. This video explains what QFT is, why it’s necessary, and how it differs from non-relativistic quantum mechanics.

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 ...

Quantum mechanics powers lasers and precision measurements. A century-spanning perspective examines those successes and the ...

Quasicrystals, exotic states of matter characterized by an ordered structure with non-repeating spatial patterns, have been the focus of numerous recent physics studies due to their unique ...

Quantum mechanics and theoretical physics constitute the conceptual foundation for describing nature at the smallest scales and highest energies. Central to this framework is the quantum wavefunction, ...

The force we experience most intimately remains the most mysterious. Physicists understand how vast migrations of particles called photons light up our homes, and how swarms of “gluon” particles hold ...

A proposed experiment could shed light on the unknown interplay of quantum theory and general relativity. Quantum theory in curved spacetime can be theoretically understood beyond the limit at which ...

Quantum gravity addresses the deep challenge of unifying the principles of quantum mechanics with the geometric description of spacetime provided by general relativity. At low energies, gravity can be ...

In the 100th-anniversary year of quantum mechanics, which describes the universe at its smallest, most fundamental scales, the 2025 Nobel Prize in Physics has gone to three pioneers in bringing its ...

The Simons Collaboration on Probabilistic Paths to Quantum Field Theory Annual Meeting will present recent progress and future directions toward the goal of developing a unified probabilistic ...

Researchers have developed a new quantum theory of gravity which describes gravity in a way that's compatible with the Standard Model of particle physics, opening the door to an improved understanding ...