Abstract
Noise is generally thought as detrimental for energy transport in coupled oscillator networks. However, it has been shown that for certain coherently evolving systems, the presence of noise can enhance, somehow unexpectedly, their transport efficiency; a phenomenon called environment-assisted quantum transport (ENAQT) or dephasing-assisted transport. Here, we report on the experimental observation of such effect in a network of coupled electrical oscillators. We demonstrate that by introducing stochastic fluctuations in one of the couplings of the network, a relative enhancement in the energy transport efficiency of 22.5 ± 3.6% can be observed.
Highlights
Oscillator, so-called diagonal fluctuations[2], here we introduce noise in the system by means of stochastic fluctuations in one of the network’s capacitive couplings, referred to as off-diagonal dynamical disorder[25]
We show that fluctuations in the coupling can influence the system so that the energy transferred to one of the oscillators is increased, demonstrating that off-diagonal dynamical disorder can effectively be used for enhancing the efficiency of energy transport systems
To verify that the observed enhancement was a consequence of energy rearrangement due to random fluctuations in the coupling, and not because external energy was introduced in the electronic circuit, we measured the transport efficiency of all oscillators
Summary
Oscillator, so-called diagonal fluctuations[2], here we introduce noise in the system by means of stochastic fluctuations in one of the network’s capacitive couplings, referred to as off-diagonal dynamical disorder[25]. We show that fluctuations in the coupling can influence the system so that the energy transferred to one of the oscillators is increased, demonstrating that off-diagonal dynamical disorder can effectively be used for enhancing the efficiency of energy transport systems.
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