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Facts and myths abo...
Facts and myths about zero-point thermal noise, and information entropy versus thermal entropy
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- Kish, L. B. (författare)
- Texas A&M Univ, Dept Elect & Comp Engn, College Stn, TX USA
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- Niklasson, Gunnar A., Professor, 1953- (författare)
- Uppsala universitet,Fasta tillståndets fysik
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- Granqvist, Claes Göran, 1946- (författare)
- Uppsala universitet,Fasta tillståndets fysik
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- Ferry, D. K. (författare)
- Arizona State Univ, Sch Elect Comp & Energy Engn, Tempe, AZ USA
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- Smulko, J. M. (författare)
- Gdansk Univ Technol, Fac Elect Telecommun Informat, Dept Metrol & Optoelect, Gdansk, Poland
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(creator_code:org_t)
- New York : IEEE, 2017
- 2017
- Engelska.
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Ingår i: 2017 International Conference on Noise and Fluctuations (ICNF). - New York : IEEE. - 9781509027606 - 9781509027613
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- In this talk, we are briefly surveying our recent results [1-3] about two very popular yet often misunderstood concepts in physical informatics: (i) The existence of Johnson noise at near to absolute zero temperature has been debated many times yet it is generally accepted [1]. We point out the fundamental problems [2] with the particular approach the related quantum theories [4] of Fluctuation-Dissipation Theorem are using. Then we prove that the existence of zero-point noise would allow the construction of a perpetual motion machine [1]. Finally, we cite early works pointing out that the observed “zeropoint” noise in experiments [7] with phase-sensitive linear amplifiers is an amplifier-noise [5,6] due to the uncertainty principle, and it does not exist in the resistor in an objective way, independently from the measurement [1,2]. Thus a correct derivation of the Fluctuation-Dissipation Theorem must include [1] the type of experimental setup used for the measurement. (ii) The general opinion is that information entropy and thermal entropy are interchangeable. This belief triggered Brillouin's negentropy principle of information [8], and Landauer's claimed principle [9] about energy dissipation during information erasure that has been debated on many occasions [10-19]. Here we show the newest and perhaps the simplest arguments [3] proving that the two types of entropies are apples and oranges and are not interchangeable.
Ämnesord
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Nyckelord
- Second Law
- noise
- measurements
- entropy
- information
Publikations- och innehållstyp
- ref (ämneskategori)
- kon (ämneskategori)
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