Abstract
The total radiation energy in a cavity is studied in the limit of small volume and temperature. The validity of refined high-temperature expansions is examined. For the cube-shaped cavity with edge lengthL complete results covering the range 0≦LT<∞ are presented.
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Abbreviations
- k :
-
Boltzmann constant
- T :
-
absolute temperature
- h :
-
Planck's constant
- h :
-
Dirac's symbolh/2π
- c :
-
velocity of light
- V :
-
volume of cavity
- K :
-
degree Kelvin
- cm:
-
centimeter
- v i :
-
frequency of thei-th cavity mode
- g i :
-
weight ofv i
- \(\bar D(v)\) :
-
averaged mode density of cavity radiation
- L :
-
edge length of cube shaped cavity, length of cylinder shaped cavity
- ϑ:
-
order of
- γ:
-
circumference of cylindrical cavity
- γ i :
-
i-th smooth piece of γ
- α j :
-
j-th corner angle of γ
- A :
-
effective length in second order correction of mode density
- K :
-
curvature of γ i
- R :
-
radius of cylinder shaped cavity
- E :
-
exact total radiation energy
- E i :
-
i-th term in the high-temperature expansion ofE
- E *i :
-
i-th term in the low-temperature expansion ofE
- p :
-
diameter-to-length ratio=2R/L for cylindrical cavities
- j s, l :
-
s-th zero of Bessel functionJ l(x)
- j's, l :
-
s-th zero of derivative of Bessel function,J'l(x)
References
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K.M.Case, S.C.Chiu: Phys. Rev.A1, 1170 (1970)
H.P.Baltes: Phys. Rev.A6 (1972)
H.P.Baltes, F.K.Kneubühl: Helv. Phys. Acta45, 481 (1972). (Dissertation No. 4776, ETH Zürich 1971)
R.Balian, C.Bloch: Ann. Phys.64, 271 (1971)
H.P.Baltes, F.K.Kneubühl: Opt. Comms.4, 9 (1971)
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Baltes, H.P. Deviations from the Stefan Boltzmann law at low temperatures. Appl. Phys. 1, 39–43 (1973). https://doi.org/10.1007/BF00886803
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DOI: https://doi.org/10.1007/BF00886803