SKM 2023 – scientific programme

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BP: Fachverband Biologische Physik

BP 11: Poster Session I

BP 11.50: Poster

Tuesday, March 28, 2023, 12:30–15:30, P1

Is sensory adaptation generally limited by the energy-speed-accuracy tradeoff? — •Vansh Kharbanda^1,2 and Benedikt Sabass^1,2 — ¹Institute for Infectious Diseases and Zoonoses, Department of Veterinary Sciences, LMU München — ²Department of Physics, LMU München

Sensory adaptation is vital to all living organisms. An adaptive sensory system can be modelled as a stochastic, nonlinear feedback network. Using a generic framework, we study the accuracy of adaptive mechanisms and its energetic cost. Recently, it has been suggested that the steady-state dissipation rate associated to maintenance of an adaptive state increases logarithmically with the adaptation accuracy. We present results that demonstrate that this logarithmic scaling does not hold generally, but appears to be linear when the state of the system is close to the phase-space boundaries. Our numerical results also suggest that boundaries in the phase space of system variables limit the capacity of the system to dissipate. Moreover, we conjecture a new empirical expression relating the steady-state dissipation rate and the strength of the input signal if the state lies in the vicinity of the boundaries. Finally, the combined adaptation accuracy of two linearly coupled systems is studied. We show that a coupling of the outputs of the systems deteriorates the overall adaptation accuracy while the associated energy cost is also reduced. In contrast, a coupling of the control elements reduces the dissipation rate without compromising on the adaptation accuracy.