Abstract
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.
Original language | English (US) |
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Title of host publication | 2017 International Conference on Noise and Fluctuations, ICNF 2017 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
ISBN (Electronic) | 9781509027606 |
DOIs | |
State | Published - Jul 19 2017 |
Event | 2017 International Conference on Noise and Fluctuations, ICNF 2017 - Vilnius, Lithuania Duration: Jun 20 2017 → Jun 23 2017 |
Other
Other | 2017 International Conference on Noise and Fluctuations, ICNF 2017 |
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Country/Territory | Lithuania |
City | Vilnius |
Period | 6/20/17 → 6/23/17 |
Keywords
- entropy
- information
- measurements
- noise
- Second Law
ASJC Scopus subject areas
- Computer Networks and Communications
- Electronic, Optical and Magnetic Materials
- Electrical and Electronic Engineering