Thermal Fluctuations and Electromagnetic Noise Spectra in Quantum Statistical Mechanics
نویسندگان
چکیده
Abstract We derive the thermal noise spectrum of longitudinal and transverse electric field operator a given wave vector starting from quantum-statistical definitions relate it to frequency dependent complex conductivity in homogeneous, isotropic system electromagnetic interacting charged particles frame non-relativistic QED. No additional assumptions except validity linear response are used proof. The Nyquist formula for vanishing frequency, as well spectral density Callen-Welton follow byproduct. Furthermore we discuss also photon occupation numbers.
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ژورنال
عنوان ژورنال: International Journal of Theoretical Physics
سال: 2022
ISSN: ['0020-7748', '1572-9575']
DOI: https://doi.org/10.1007/s10773-022-05124-8