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vacuum breaking

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  • Vacuum energy — is an underlying background energy that exists in space even when devoid of matter (known as free space). The vacuum energy is deduced from the concept of virtual particles, which is itself derived from the energy time uncertainty principle. Its… …   Wikipedia

  • Vacuum manifold — In quantum field theory, the vacuum state may be degenerate. Each pure vacuum state generates its own superselection sector. The space of all pure vacuum states often has a manifold structure and is called the vacuum manifold.Vacuum manifolds… …   Wikipedia

  • Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… …   Wikipedia

  • Vacuum state — In quantum field theory, the vacuum state (also called the vacuum) is the quantum state with the lowest possible energy. Generally, it contains no physical particles. The term zero point field is sometimes used as a synonym for the vacuum state… …   Wikipedia

  • Vacuum expectation value — Quantum field theory (Feynman diagram) …   Wikipedia

  • Vacuum — This article is about empty physical space or the absence of matter. For other uses, see Vacuum (disambiguation). Free space redirects here. For other uses, see Free space (disambiguation). Pump to demonstrate vacuum In everyday usage, vacuum is… …   Wikipedia

  • Vacuum cleaner — Cylinder vacuum cleaner for home use. French train vacuum cleaner …   Wikipedia

  • Vacuum brake — The vacuum brake is a braking system used on trains. It was first introduced in the mid 1860s and a variant, the automatic vacuum brake system became almost universal in British train equipment, and in those countries influenced by British… …   Wikipedia

  • QCD vacuum — The QCD vacuum is the vacuum state of quantum chromodynamics (QCD). It is an example of a non perturbative vacuum state, characterized by many non vanishing condensates such as the gluon condensate or the quark condensate. These condensates… …   Wikipedia

  • Spontaneous symmetry breaking — Quantum field theory (Feynman diagram) …   Wikipedia

  • Symmetry breaking — in physics describes a phenomenon where (infinitesimally) small fluctuations acting on a system crossing a critical point decide a system s fate, by determining which branch of a bifurcation is taken. For an outside observer unaware of the… …   Wikipedia

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