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Proceedings Paper

Origins of homochirality: a simulation by electrical circuit
Author(s): Jun Park; C. W. Cheng; David B. Cline; Y. Liu; H. So; Huijuan Wang
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Paper Abstract

Chiral asymmetry is apparent in almost all living organisms on earth. However, the origins of chirality are unknown. One proposed theory of chiral asymmetry is by a symmetry-breaking transition such as the explosion of a supernova emitting neutrinos into the earth's biosphere during the prebiotic era. The discovery of weak neutral currents reinforces this theory. We present a simulation of this thoery by an electrical circuit that models the bifurcation equation of the chiral symmetry breaking process. There are three components that constitute this circuit: chiral circuit, sawtooth wave generator, and noise generator. The solution to the chiral circuit, which is the core of the hardware, generates the bifurcation equation. The sawtooth wave generator controls the bifurcation point (critical point), and the noise generator gives the system randomness. We included an adjustable bias voltage and saw a tendency to favor one symmetry over another (D or L) with randomness generated by noise.

Paper Details

Date Published: 8 September 1995
PDF: 13 pages
Proc. SPIE 2551, Photoelectronic Detectors, Cameras, and Systems, (8 September 1995); doi: 10.1117/12.218648
Show Author Affiliations
Jun Park, Univ. of California/Los Angeles (United States)
C. W. Cheng, Univ. of California/Los Angeles (United States)
David B. Cline, Univ. of California/Los Angeles (United States)
Y. Liu, Univ. of California/Los Angeles (United States)
H. So, Occidental College (United States)
Huijuan Wang, Univ. of California/Los Angeles (United States)


Published in SPIE Proceedings Vol. 2551:
Photoelectronic Detectors, Cameras, and Systems
C. Bruce Johnson; Ervin J. Fenyves, Editor(s)

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