ELFT HÍRADÓ

[StatFizSzeminar <statfiz AT glu.elte.hu>]

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                ELTE TTK Fizikai Intézet
         STATISZTIKUS FIZIKAI SZEMINÁRIUM


                     2017. június 26.
                      hétfő, 10.00 


                    László B. Kish

     Department of Electrical and Computer Engineering,
                  Texas A&M University 

      "Facts and myths about zero-point thermal noise
       and Information entropy versus thermal entropy"


- The existence of non-zero Johnson noise when approaching
zero temperature has been debated many times, yet it is almost
generally accepted. We point our that the acceptance of non-zero
zero-point noise leads to perpetual motion machines that violates
the Second Law of Thermodynamics. The Fluctuation- Dissipation 
Theorem for voltage/current noise is unacceptable in its present
form in the quantum limit and the correct theoretical result must
depend on the particular type of noise measurement system.

- Information entropy and thermal entropy are apples and oranges
and they do not generally obey Brillouin's principle and never 
satisfy Landauer's erasure dissipation principle for memories.

References

L.B. Kish, G.A. Niklasson, C.G Granqvist, "Zero-point term and 
quantum effects in the Johnson noise of resistors: A critical
appraisal", J. Stat. Mech. 2016 (2016) 054006.

L.B. Kish, G.A. Niklasson, C.G. Granqvist, "Zero thermal noise
in resistors at zero temperature", Fluct. Noise. Lett. 15 (2016)
1640001.

L.B. Kish, D.K. Ferry, "Information entropy and thermal entropy:
apples and oranges", arXiv:1706.01459

 
     1117, Budapest, Pázmány P. sétány 1/A, Északi tömb 2.54
                honlap: http://glu.elte.hu/~statfiz

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