Quantum Motors and Pumps Far from Equilibrium
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  • Release Date: 2021-11-09
  • quantum thermodynamics
  • steady-state dynamics
  • nonlinear transport
  • adiabatic quantum motors
  • adiabatic quantum pumps
Video Introduction

This video is adapted from 10.3390/e21090824

In this video, researchers briefly review the dynamical and thermodynamical aspects of different forms of quantum motors and quantum pumps. They then extend previous results to provide new theoretical tools for a systematic study of those phenomena at far-from-equilibrium conditions. Researchers mainly focus on two key topics: (1) The steady-state regime of quantum motors and pumps, paying particular attention to the role of higher order terms in the nonadiabatic expansion of the current-induced forces. (2) The thermodynamical properties of such systems, emphasizing systematic ways of studying the relationship between different energy fluxes (charge and heat currents and mechanical power) passing through the system when beyond-first-order expansions are required. Researchers derive a general order-by-order scheme based on energy conservation to rationalize how every order of the expansion of one form of energy flux is connected with the others. They use this approach to give a physical interpretation of the leading terms of the expansion. Finally, they illustrate the above-discussed topics in a double quantum dot within the Coulomb-blockade regime and capacitively coupled to a mechanical rotor. Researchers find many exciting features of this system for arbitrary nonequilibrium conditions: a definite parity of the expansion coefficients with respect to the voltage or temperature biases; negative friction coefficients; and the fact that, under fixed parameters, the device can exhibit multiple steady states where it may operate as a quantum motor or as a quantum pump, depending on the initial conditions.

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Bustos-Marún, R.; Calvo, H. Quantum Motors and Pumps Far from Equilibrium. Encyclopedia. Available online: https://encyclopedia.pub/video/video_detail/116 (accessed on 15 April 2024).
Bustos-Marún R, Calvo H. Quantum Motors and Pumps Far from Equilibrium. Encyclopedia. Available at: https://encyclopedia.pub/video/video_detail/116. Accessed April 15, 2024.
Bustos-Marún, Raúl, Hernán Calvo. "Quantum Motors and Pumps Far from Equilibrium" Encyclopedia, https://encyclopedia.pub/video/video_detail/116 (accessed April 15, 2024).
Bustos-Marún, R., & Calvo, H. (2021, November 09). Quantum Motors and Pumps Far from Equilibrium. In Encyclopedia. https://encyclopedia.pub/video/video_detail/116
Bustos-Marún, Raúl and Hernán Calvo. "Quantum Motors and Pumps Far from Equilibrium." Encyclopedia. Web. 09 November, 2021.