Prog. Theor. Phys. Vol. 78 No. 6 (1987) pp. 1225-1232
Observation and Entropy. I
College of General Education, Tohoku Gakuin University, Sendai 980
*Department of Applied Physics, Faculty of Technology,
Tohoku Gakuin University, Tagajyo 985
(Received November 4, 1986)
The order of lower bounds of thermodynamical entropy productions involved in observations is derived for several simple setups of experiments. The entropy to be discussed is the one produced until a detector gets information. We show that when energy differences are essential for discrimination of information, the entropy cost per unit information increases as the amount of information increases. On the other hand, when the discrimiations of information are due to the differences of patterns, the entropy cost decreases as the amount of information increases.
DOI : 10.1143/PTP.78.1225
- L. Szilard, Z. Phys. 53 (1929), 840.
L. Brillouin, J. Appl. Phys. 22 (1951), 334[CrossRef];
ibid. 22 (1951), 338[CrossRef];
ibid. 24 (1953), 1152[CrossRef].
- H. J. Bremermann, “Quantum Noise and information” in Proc. Fifth Berkeley Sympos. Math. Stat. Prob., 1967, (Univ. Calif. Press, Berkeley, Cal.).
- “Noise in Physical Systems and 1/f Noise”, Proc. 7th Int. Conf. on `Noise in Physical Systems' and the 3rd Int. Conf. on `1/f Noise', 1983, ed. M. Savelli et al. (North-Holland).
Citing Article(s) :
Progress of Theoretical Physics Vol. 78 No. 6 (1987) pp. 1233-1235
Observation and Entropy. II
Koichi Takahashi and Masatoshi Iwamoto