有關 零點能量和 零點能量場
零點能量zero point energy 零點能量場 zero point field的資料最好由深至淺>"<如果不行的話...就丟資料給我吧
- ?Lv 51 decade agoFavorite Answer
In physics, the zero-point energy is the lowest possible energy that a quantum mechanical physical system may possess and is the energy of the ground state of the system. The concept was first proposed by Albert Einstein and Otto Stern in 1913. The term "zero-point energy" is a translation of the German Nullpunktsenergie. All quantum mechanical systems have a zero point energy. The term arises commonly in reference to the ground state of the quantum harmonic oscillator and its null oscillations. In quantum field theory, it is a synonym for the vacuum energy, an amount of energy associated with the vacuum of empty space. In cosmology, the vacuum energy is taken to be the origin of the cosmological constant which is thought by many to produce dark energy. Experimentally, the zero-point energy of the vacuum leads directly to the Casimir effect, and is directly observable in nanoscale devices.
Because zero point energy is the lowest possible energy a system can have, this energy cannot be removed from the system. A related term is zero-point field, which is the lowest energy state of a field, i.e. its ground state, which is non-zero.
Despite the definition, the concept of zero-point energy, and the hint of a possibility of extracting "free energy" from the vacuum, has attracted the attention of amateur inventors. Numerous so-called free energy devices, exploiting the idea, have been proposed. As a result of this activity, and its intriguing theoretical explanation, it has taken on a life of its own in popular culture, appearing in science fiction books, games and movies.(such as Stargate Atlantis.)
2008-04-13 07:20:01 補充：
Zero-point field : In quantum field theory, the zero-point field is the lowest energy state of a field, i.e. its ground state, which is non zero. This phenomenon gives the quantum vacuum a complex structure, which can be probed experimentally; see, for example, the Casimir effect.
2008-04-13 07:20:25 補充：
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