ZA_4_00 — Condensed Matter Thermodynamics: Subfolder Summary

ZA_4_13 — Quantum Spin Liquids

A quantum spin liquid (QSL) is an exotic magnetic state of matter in which quantum fluctuations prevent the localized magnetic moments (spins) in a material from ordering into any conventional pattern — no ferromagnetism

ZA_4_11 — Time Crystals and Discrete Time Symmetry Breaking

A time crystal is a phase of matter that spontaneously breaks time-translation symmetry — the fundamental physical principle that the laws of physics are the same at all times (which, via Noether's theorem, is linked to

ZA_4_10 — Topological Phases of Matter

The discovery of topological phases of matter — states of matter that cannot be described by Landau's conventional symmetry-breaking paradigm but are instead characterized by topological invariants (mathematical quantiti

ZA_4_12 — Bose-Einstein Condensates and Ultracold Atoms

A Bose-Einstein condensate (BEC) is a state of matter formed when a dilute gas of bosons (particles with integer spin) is cooled to temperatures near absolute zero (~nanokelvin), causing a macroscopic fraction of the ato

ZA_0_00 — Physics & Quantum Mechanics: Section Summary

ZA_3_10 — Muon Anomalous Magnetic Moment

The anomalous magnetic moment of the muon ($a_\mu = (g-2)/2$) is one of the most precisely measured quantities in particle physics and one of the most sensitive probes for physics beyond the Standard Model. Every charged

ZA_3_11 — Cosmic Ray Physics and Ultra-High-Energy Particles

Cosmic rays — high-energy particles (primarily protons, alpha particles, and heavier atomic nuclei, with a small fraction of electrons and antimatter) that bombard Earth from space — were discovered by Victor Hess in 191

ZA_3_00 — Particle Nuclear Physics: Subfolder Summary

ZA_3_09 — Dark Matter Particle Candidates and Detection

The evidence that approximately 27% of the universe's total energy density consists of dark matter — matter that interacts gravitationally but does not emit, absorb, or scatter electromagnetic radiation in any detectable