TY - JOUR
T1 - Noise-driven neuromorphic tuned amplifier
AU - Fanelli, Duccio
AU - Ginelli, Francesco
AU - Livi, Roberto
AU - Zagli, Niccolò
AU - Zankoc, Clement
N1 - Acknowledgments
The authors acknowledge financial support from H2020-MSCA-ITN-2015 project COSMOS 642563.
PY - 2017/12/26
Y1 - 2017/12/26
N2 - We study a simple stochastic model of neuronal excitatory and inhibitory interactions. The model is defined on a directed lattice and internodes couplings are modulated by a nonlinear function that mimics the process of synaptic activation. We prove that such a system behaves as a fully tunable amplifier: the endogenous component of noise, stemming from finite size effects, seeds a coherent (exponential) amplification across the chain generating giant oscillations with tunable frequencies, a process that the brain could exploit to enhance, and eventually encode, different signals. On a wider perspective, the characterized amplification process could provide a reliable pacemaking mechanism for biological systems. The device extracts energy from the finite size bath and operates as an out of equilibrium thermal machine, under stationary conditions.
AB - We study a simple stochastic model of neuronal excitatory and inhibitory interactions. The model is defined on a directed lattice and internodes couplings are modulated by a nonlinear function that mimics the process of synaptic activation. We prove that such a system behaves as a fully tunable amplifier: the endogenous component of noise, stemming from finite size effects, seeds a coherent (exponential) amplification across the chain generating giant oscillations with tunable frequencies, a process that the brain could exploit to enhance, and eventually encode, different signals. On a wider perspective, the characterized amplification process could provide a reliable pacemaking mechanism for biological systems. The device extracts energy from the finite size bath and operates as an out of equilibrium thermal machine, under stationary conditions.
U2 - 10.1103/PhysRevE.96.062313
DO - 10.1103/PhysRevE.96.062313
M3 - Article
VL - 96
SP - 1
EP - 11
JO - Physical Review. E, Statistical, Nonlinear and Soft Matter Physics
JF - Physical Review. E, Statistical, Nonlinear and Soft Matter Physics
SN - 1539-3755
IS - 6
M1 - 062313
ER -