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  2. Plane (Dungeons & Dragons) - Wikipedia

    en.wikipedia.org/wiki/Plane_(Dungeons_&_Dragons)

    They consist of the Elemental Planes [1] of air, earth, fire and water, and the Energy Planes. Some descriptions also contain the Para-elemental (magma, ice, etc.) and Quasi-elemental planes (lightning, dust, etc.) linking them. [1] The energy planes are the Positive Material Plane and Negative Material Plane.

  3. List of particles - Wikipedia

    en.wikipedia.org/wiki/List_of_particles

    The pions are quasi-goldstone bosons (quasi- because they are not exactly massless) of the broken chiral isospin symmetry of quantum chromodynamics. Parton, is a generic term coined by Feynman for the sub-particles making up a composite particle – at that time a baryon – hence, it originally referred to what are now called "quarks" and ...

  4. Manual of the Planes - Wikipedia

    en.wikipedia.org/wiki/Manual_of_the_Planes

    The Ethereal Plane, The Inner Planes—including the Plane of Elemental Air, the Plane of Elemental Fire, the Plane of Elemental Earth, and the Plane of Elemental Water, the Para-Elemental Planes (Smoke, Magma, Ooze, and Ice), the Energy Planes (Positive Energy and Negative Energy), and the Quasi-Elemental Planes (Lightning, Radiance, Minerals ...

  5. Planescape - Wikipedia

    en.wikipedia.org/wiki/Planescape

    An artistic representation of the grand design of the Planes. The Dungeons & Dragons cosmology as reflected in Planescape consists of a number of planes, which can be divided into the following regions: [1] The Inner Planes (representing planes of elemental nature, such as Water, Earth, Fire, and Air, as well as the Positive and Negative energy ...

  6. False vacuum - Wikipedia

    en.wikipedia.org/wiki/False_vacuum

    A subsequent study in 2017 indicated that the bubble would collapse into a primordial black hole rather than originate from it, either by ordinary collapse or by bending space in such a way that it breaks off into a new universe. [51] In 2019, it was found that although small non-spinning black holes may increase true vacuum nucleation rate ...

  7. Quasiparticle - Wikipedia

    en.wikipedia.org/wiki/Quasiparticle

    But the Schrödinger equation in this case is a partial differential equation (PDE) on a 3×10 18-dimensional vector space—one dimension for each coordinate (x, y, z) of each particle. Directly and straightforwardly trying to solve such a PDE is impossible in practice.

  8. List of quasiparticles - Wikipedia

    en.wikipedia.org/wiki/List_of_quasiparticles

    Particle with zero mass gap in one direction of space. electron Surface magnon polariton: Coupling between spin waves and electromagnetic waves. magnon, photon Surface phonon: Vibrational modes in a crystal lattice associated with atomic shifts at the surface. Surface plasmon: A coherent excitation of a plasma at the surface of a metal.

  9. De Sitter universe - Wikipedia

    en.wikipedia.org/wiki/De_Sitter_universe

    A de Sitter universe is a cosmological solution to the Einstein field equations of general relativity, named after Willem de Sitter.It models the universe as spatially flat and neglects ordinary matter, so the dynamics of the universe are dominated by the cosmological constant, thought to correspond to dark energy in our universe or the inflaton field in the early universe.