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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]
Zero-point energy (ZPE) is the lowest possible energy that a quantum mechanical system may have. Unlike in classical mechanics, quantum systems constantly fluctuate in their lowest energy state as described by the Heisenberg uncertainty principle. [1] Therefore, even at absolute zero, atoms and molecules retain some vibrational motion.
In the zero-energy universe model ("flat" or "Euclidean"), the total amount of energy in the universe is exactly zero: its amount of positive energy in the form of matter is exactly cancelled out by its negative energy in the form of gravity. [2] It is unclear which, if any, of these models accurately describes the real universe.
In the sci-fi television/film franchise Stargate, a Zero Point Module (ZPM) is a power source that extracts zero-point energy from a micro parallel universe. [ 12 ] The book Star Trek: Deep Space Nine Technical Manual describes the operating principle of the so-called quantum torpedo .
The Milne universe is a special case of a more general Friedmann–Lemaître–Robertson–Walker model (FLRW). The Milne solution can be obtained from the more generic FLRW model by demanding that the energy density, pressure and cosmological constant all equal zero and the spatial curvature is negative.
A zero energy building (ZEB), a building's use with zero net energy consumption and zero carbon emissions; Zero-Net-Energy USA Federal Buildings President Obama has ordered that 15% of U.S. Federal buildings be zero-net-energy by 2015 and 100% of all new buildings by 2030; Zero-energy universe, a concept that states that the total amount of ...
Download as PDF; Printable version ... Thermal energy - Thermodynamic free energy - Threshold energy - Tidal power ... Zero-energy building - Zero-energy universe ...
In 1973, he proposed that the universe is a large-scale quantum fluctuation in vacuum energy. This is called vacuum genesis or the zero-energy universe hypothesis. He has been quoted as saying, "the universe is simply one of those things that happens from time to time." [14] In 1967, he began working at Columbia University as a research assistant.