Abstract
A circuit made of a phototube in series with a linear resistor connected in parallel to a resistor–capacitor shunted Josephson junction (JJ) is proposed to describe a neuron sensitive to external illuminations. The neuronal circuit based on JJ actuated by a photocurrent is analytically, numerically and experimentally investigated in this paper. The stability of the equilibrium points obtained from the rate equations describing the neuronal circuit based on JJ actuated by a photocurrent is studied. The hysteresis loop widths of current–voltage curves increase with the increase of the damping parameter due to the linear resistor in series with phototube for a constant phototube voltage. Whereas the hysteresis loop of current–voltage curves shifts on the left with the increase of constant phototube voltage. Periodic spiking oscillations, periodic bursting oscillations, continuous spiking oscillations, chaotic spiking oscillations, and chaotic oscillations are found during the numerical analysis by varying the damping parameter due to the linear resistor in series with the phototube and modulation parameters of a sinusoidal voltage of phototube. Finally, the numerical analysis results are confirmed by the microcontroller implementation of a neuronal circuit based on JJ neuron actuated by a photocurrent.
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Acknowledgements
This work is partially funded by the Center for Nonlinear Systems, Chennai Institute of Technology, India via funding number CIT/CNS/2021/RD/064.
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NFFF and BR developed the system under study and theoretically analyzed its rate equations. ACC and STK did the microcontroller implementation of the system under study. AFT and VKK participated in the data analysis at different stages. All authors contributed to the interpretation of the results and writing of the manuscript.
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Foka, N.F.F., Ramakrishnan, B., Chamgoué, A.C. et al. Neuronal circuit based on Josephson junction actuated by a photocurrent: dynamical analysis and microcontroller implementation. Eur. Phys. J. B 95, 91 (2022). https://doi.org/10.1140/epjb/s10051-022-00343-8
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DOI: https://doi.org/10.1140/epjb/s10051-022-00343-8