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  2. Negative energy - Wikipedia

    en.wikipedia.org/wiki/Negative_energy

    The negative-energy particle then crosses the event horizon into the black hole, with the law of conservation of energy requiring that an equal amount of positive energy should escape. In the Penrose process , a body divides in two, with one half gaining negative energy and falling in, while the other half gains an equal amount of positive ...

  3. Cosmological constant problem - Wikipedia

    en.wikipedia.org/wiki/Cosmological_constant_problem

    The calculated vacuum energy is a positive, rather than negative, contribution to the cosmological constant because the existing vacuum has negative quantum-mechanical pressure, while in general relativity, the gravitational effect of negative pressure is a kind of repulsion.

  4. Positron - Wikipedia

    en.wikipedia.org/wiki/Positron

    Robert Oppenheimer argued strongly against the proton being the negative-energy electron solution to Dirac's equation. He asserted that if it were, the hydrogen atom would rapidly self-destruct. [8] Weyl in 1931 showed that the negative-energy electron must have the same mass as that of the positive-energy electron. [9]

  5. Dirac sea - Wikipedia

    en.wikipedia.org/wiki/Dirac_sea

    It still lowers the energy of the vacuum, but in this point of view it does so by creating a negative energy object. This reinterpretation only affects the philosophy. To reproduce the rules for when annihilation in the vacuum gives zero, the notion of "empty" and "filled" must be reversed for the negative energy states.

  6. Zero-energy universe - Wikipedia

    en.wikipedia.org/wiki/Zero-energy_universe

    Gravitational energy from visible matter accounts for 26–37% of the observed total mass–energy density. [15] Therefore, to fit the concept of a "zero-energy universe" to the observed universe, other negative energy reservoirs besides gravity from baryonic matter are necessary. These reservoirs are frequently assumed to be dark matter. [16]

  7. Antiparticle - Wikipedia

    en.wikipedia.org/wiki/Antiparticle

    Solutions of the Dirac equation contain negative energy quantum states. As a result, an electron could always radiate energy and fall into a negative energy state. Even worse, it could keep radiating infinite amounts of energy because there were infinitely many negative energy states available.

  8. Dirac hole theory - Wikipedia

    en.wikipedia.org/wiki/Dirac_hole_theory

    Dirac hole theory is a theory in quantum mechanics, named after English theoretical physicist Paul Dirac, who introduced it in 1929. [1] The theory poses that the continuum of negative energy states, that are solutions to the Dirac equation, are filled with electrons, and the vacancies in this continuum (holes) are manifested as positrons with energy and momentum that are the negative of those ...

  9. Pound–Rebka experiment - Wikipedia

    en.wikipedia.org/wiki/Pound–Rebka_experiment

    A continuous beam of electromagnetic energy with frequency is emitted by towards . According to the equivalence principle, this system is equivalent to a gravitation-free system which moves with uniform acceleration g {\displaystyle g} in the direction of the positive z -axis, with S 2 {\displaystyle S_{2}} separated by a constant distance h ...