Table of Contents
What is excitation of an electron?
Electron excitation is the transfer of a bound electron to a more energetic, but still bound state. This can be done by photoexcitation (PE), where the electron absorbs a photon and gains all its energy or by electrical excitation (EE), where the electron receives energy from another, energetic electron.
What is the excitation of atom?
excitation, in physics, the addition of a discrete amount of energy (called excitation energy) to a system—such as an atomic nucleus, an atom, or a molecule—that results in its alteration, ordinarily from the condition of lowest energy (ground state) to one of higher energy (excited state).
What is excitation and de-excitation of electron?
atomic de-excitation: process by which an atom transfers from an excited electronic state back to the ground state electronic configuration; often occurs by emission of a photon. laser: acronym for light amplification by stimulated emission of radiation. phosphorescence: the de-excitation of a metastable state.
How is a field excitation?
The most natural way to excite a field is to transfer energy into it from somewhere else (eg from another field) such as when an electron and positron (two complementary excitations of the electron field) annihilate to excite the electromagnetic field by producing gamma ray photons.
How do you excite a photon?
If you take a photon, make it go through some atoms in a solid, liquid or whatever, then you have the chance of this photon being absorbed by an electron, and thereby exciting the electron. This requires the photon to have enough energy to actually excite the electron to another energy level.
What is an excited electron in photosynthesis?
The excited electron is boosted to a higher energy state. Electrons are passed from a photosystem into a redox or electron transport chain, eventually attaching to a chlorophyll molecule in Photosystem I (P700). Light acts on chlorophyll in Photosystem I, causing an electron to be boosted to a still higher potential.
Is the electron an excitation of the electron field or a field?
QFT, from what I understand, describes the electron as an excitation of the electron field. Both of these models describe the electron as some excitation of a mathematical field permeating space and time. My question is this:
What makes an electron stable?
If an electron really is described in this way (either using a wave function, or a field), what properties of the field, or of space-time itself, make it so the electron is stable (i.e. the excitation does not spontaneously decay, stop existing, or change) what causes the electron to continuously remain the same from one moment to the next)?
Is the excitation of each oscillator a particle?
Now each discrete excitation of each oscillator is a particle. The assembly has the built-in option of destroying as well as creating particles.
Why is the number of electrons in a wave function discrete?
In standard quantum mechanics, the wave function have discrete energy-values due to a potential. However, my very limited understanding of QFT is that electrons are excitation in the Dirac field, and the number of electrons is discrete even in free space. What is the reason for this, and why is there a minimum excitation?