Microscopic thermal machines using run-and-tumble particles

Abstract

Microscopic thermal machines that are of the dimensions of around few hundred nanometers have been the subject of intense study over the last two decades. Recently, it has been shown that the efficiency of such thermal engines can be enhanced by using active Ornstein-Uhlenbeck particles (AOUP). In this work, we numerically study the behaviour of tiny engines and refrigerators that use an active run-and-tumble particle (RTP) as the working system. We find that the results for the engine mode are in sharp contrast with those of engines using AOUP, thus showing that the nature of activity has a strong influence on the qualitative behaviours of thermal machines for nonequilibrium cycles. The efficiency of an engine using a run-and-tumble particle is found to be smaller in general than a passive microscopic engine. However, when the applied protocol is time-reversed, the resulting microscopic refrigerator can have a much higher coefficient of performance under these conditions. The effect of variation of different parameters of the coefficient of performance has been explored. A non-monotonic variation of coefficient of performance with active force has been found.

16 pages, 13 figures

References in corpus (11)

• Physics of Microswimmers - Single Particle Motion and Collective Behavior
• Quantum Thermodynamic Cycles and quantum heat engines
• Efficiency at maximum power: An analytically solvable model for stochastic heat engines
• When are active Brownian particles and run-and-tumble particles equivalent? Consequences for motility-induced phase separation
• Run-and-tumble particle in one-dimensional confining potential: Steady state, relaxation and first passage properties
• Entropy Production of Brownian Macromolecules with Inertia
• Enhanced diffusion, swelling and slow reconfiguration of a single chain in non-Gaussian active bath
• A stochastic heat engine using an active particle
• Run-and-tumble bacteria slowly approaching the diffusive regime
• Theory of light-activated catalytic Janus particles
• Stochastic Work Extraction in a colloidal heat engine in presence of colored noise

Cited by in corpus (2)

• Thermodynamics of one and two-qubit nonequilibrium heat engines running between squeezed thermal reservoirs
• Exactly solvable model of a passive Brownian heat engine and its comparison with active engines