Is it a fact that vacuum energy exists? - Physics Forums
2022年4月2日 · Vacuum energy, also known as zero-point energy, is a type of energy that exists in empty space even when there is no matter or radiation present. It is a fundamental concept in quantum mechanics and is often described as the lowest possible energy that a quantum mechanical physical system may have.
Exploring the Cosmological Constant Problem & Zero-Point Energy
2022年10月28日 · Reading the Wikipedia page on it, one reads: In cosmology, the cosmological constant problem or vacuum catastrophe is the disagreement between the observed values of vacuum energy density (the small value of the cosmological constant) and theoretical large value of zero-point energy suggested...
Partition function and vacuum energy (basic stuff) - Physics Forums
2015年11月3日 · The vacuum energy, also known as the zero-point energy, is the lowest possible energy state of a quantum mechanical system. In the partition function, it represents the energy of the system when all other energy levels are empty.
Vacuum Energy and Dark Energy: Are They One and the Same?
2007年8月29日 · In summary, vacuum energy is the energy of empty space, while dark energy is a type of energy responsible for the expansion of the universe. Vacuum energy is measured indirectly through its effects on other physical phenomena, while dark energy is measured through observations of the universe.
Exploring the Potential of Vacuum Energy & Gravity - Physics …
2023年1月29日 · The Casmir effect is not about vacuum energies but about (quantum) charge fluctations in the plates. It's more similar to the (quantum description) of van der Waals forces between neutral molecules rather than some "vacuum energies" (whatever that should mean, because the vacuum energy is just the ground-state energy of a special-relativistic QFT, and …
What is Vacuum Level? - Explained in Detail - Physics Forums
2012年3月15日 · Vacuum level is the energy level where the energy of an electron becomes zero. It has nothing to do with where the electron is. Electron can be in vacuum level even being inside crystal. Any standard textbook in VLSI will explain what you need including effect of electric field on band diagram. eg. Streetman and Banerjee.
Is vacuum energy infinite? If it is, how and why? - Physics Forums
2016年10月11日 · Vacuum energy is usually not of interest to particle physicists, since it can be thought of as a shift in the ground state energy (usually taken to be zero) of a system. However, vacuum energy is of interest to cosmologists because of its possible role as a source of the cosmological constant and/or dark energy which drives the expansion of the ...
Vacuum Energy from Correlation Functions - Physics Forums
2024年3月17日 · Vacuum energy has significant implications for cosmology, particularly in the context of dark energy and the cosmological constant. The energy density associated with the vacuum can drive the accelerated expansion of the universe, as observed in distant supernovae and cosmic microwave background radiation.
Questions about Negative Pressure and Vacuum Energy - Physics …
2022年6月13日 · Vacuum energy, on the other hand, is the energy associated with the vacuum of space. In some theories, negative pressure is thought to be responsible for the expansion of the universe, and it is believed that vacuum energy plays a role in this process.
Is Dark Energy the Same as Vacuum Energy? - Physics Forums
2012年5月26日 · Dark energy and vacuum energy are often used interchangeably, but they are not exactly the same thing. Vacuum energy is a concept in quantum mechanics that describes the energy of empty space, while dark energy is a theoretical form of energy that is believed to be responsible for the accelerated expansion of the universe.