fluctuation$28988$ - ορισμός. Τι είναι το fluctuation$28988$
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Τι (ποιος) είναι fluctuation$28988$ - ορισμός

THEOREM
Fluctuation Dissipation Theorem; Fluctuation–dissipation theorem; Fluctuation dissipation theorem; Fluctuation-Dissipation theorem; Fluctuation-dissipation relation; Fluctuation–dissipation relation
  • A simple circuit for illustrating Johnson–Nyquist thermal noise in a resistor.

Quantum fluctuation         
RANDOM CHANGE IN THE ENERGY INSIDE A (TYPICALLY SUB-MICROSCOPIC) VOLUME
Vacuum fluctuations; Vacuum fluctuation; Quantum flux; Vacuum Fluctuations; Quantum Fluctuation; Quantum fluctuations; Quantum vacuum fluctuation; Quantum vacuum fluctuations; Quantum jitters; Quantum Fluctuations
In quantum physics, a quantum fluctuation (also known as a vacuum state fluctuation or vacuum fluctuation) is the temporary random change in the amount of energy in a point in space, as prescribed by Werner Heisenberg's uncertainty principle. They are minute random fluctuations in the values of the fields which represent elementary particles, such as electric and magnetic fields which represent the electromagnetic force carried by photons, W and Z fields which carry the weak force, and gluon fields which carry the strong force.
Fluctuation-dissipation theorem         
The fluctuation–dissipation theorem (FDT) or fluctuation–dissipation relation (FDR) is a powerful tool in statistical physics for predicting the behavior of systems that obey detailed balance. Given that a system obeys detailed balance, the theorem is a proof that thermodynamic fluctuations in a physical variable predict the response quantified by the admittance or impedance (to be intended in their general sense, not only in electromagnetic terms) of the same physical variable (like voltage, temperature difference, etc.
Fluctuation         
WIKIMEDIA DISAMBIGUATION PAGE
Fluctuations; Fluctuations (disambiguation); Fluctuation (disambiguation)
·noun A wavering; unsteadiness; as, fluctuations of opinion; fluctuations of prices.
II. Fluctuation ·noun A motion like that of waves; a moving in this and that direction; as, the fluctuations of the sea.
III. Fluctuation ·noun The motion or undulation of a fluid collected in a natural or artifical cavity, which is felt when it is subjected to pressure or percussion.

Βικιπαίδεια

Fluctuation-dissipation theorem

The fluctuation–dissipation theorem (FDT) or fluctuation–dissipation relation (FDR) is a powerful tool in statistical physics for predicting the behavior of systems that obey detailed balance. Given that a system obeys detailed balance, the theorem is a proof that thermodynamic fluctuations in a physical variable predict the response quantified by the admittance or impedance (to be intended in their general sense, not only in electromagnetic terms) of the same physical variable (like voltage, temperature difference, etc.), and vice versa. The fluctuation–dissipation theorem applies both to classical and quantum mechanical systems.

The fluctuation–dissipation theorem was proven by Herbert Callen and Theodore Welton in 1951 and expanded by Ryogo Kubo. There are antecedents to the general theorem, including Einstein's explanation of Brownian motion during his annus mirabilis and Harry Nyquist's explanation in 1928 of Johnson noise in electrical resistors.