Absolute Negative Mobility Induced by Thermal Equilibrium Fluctuations

Abstract

A novel transport phenomenon is identified that is induced by inertial Brownian particles which move in simple one-dimensional, symmetric periodic potentials under the influence of both a time periodic and a constant, biasing driving force. Within tailored parameter regimes, thermal equilibrium fluctuations induce the phenomenon of absolute negative mobility (ANM), which means that the particle noisily moves backwards against a small constant bias. When no thermal fluctuations act, the transport vanishes identically in these tailored regimes. ANM can also occur in the absence of fluctuations on grounds which are rooted solely in the complex, inertial deterministic dynamics. The experimental verification of this new transport scheme is elucidated for the archetype symmetric physical system: a convenient setup consisting of a resistively and capacitively shunted Josephson junction device.

Observation of Negative Absolute Resistance in a Josephson Junction

“…[16]. While the underlying basic physical mechanism still requires at least two spatial dimensions, very recently, NAR has been analyzed and predicted theoretically to occur also in the simplest possible case of a single Brownian particle dynamics in one dimension [17,18]. More precisely, two basically different physical mechanisms capable of generating NAR in such systems have been unraveled, namely a purely noise induced effect in Ref.…”

“…More precisely, two basically different physical mechanisms capable of generating NAR in such systems have been unraveled, namely a purely noise induced effect in Ref. [17] and a transient chaos induced effect in Refs. [18].…”

Controlling uphill motion of an active Brownian particle driven by shot-noise energy pulses

“…For a stopping force (too heavy load), the absolute value of the current vanishes and the device stops operating [25,26]. In other words, the ratchet system works as a motor only within the region where the current opposes the load force F 0 and moving particles perform some work.…”

Frequency Windows of Absolute Negative Conductance in Josephson Junctions

“…ANC (ANM) was also studied theoretically for ac-dc-driven tunnelling transport [7], in the dynamics of cooperative Brownian motors [8], for Brownian transport in systems of a complex topology [9] and in some stylized, multi-state models with state-dependent noise [10], to name but a few. Recently, ANC was discovered in relatively simple symmetric periodic systems [11] like a Josephson junction. In this paper, we continue to study the same system as in [11], and demonstrate multiple manifestations of ANC in the range of ac-current frequency.…”

“…Recently, ANC was discovered in relatively simple symmetric periodic systems [11] like a Josephson junction. In this paper, we continue to study the same system as in [11], and demonstrate multiple manifestations of ANC in the range of ac-current frequency.…”