Results 21 to 30 of about 3,155,393 (333)
Autonomous circular heat engine [PDF]
Physical Review E, 2022 A dynamical model of a highly efficient heat engine is proposed, where an applied temperature difference maintains the motion of particles around the circuit consisting of two asymmetric narrow channels, in one of which the current flows against the applied thermodynamic forces.
Giuliano Benenti +3 more
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Analog of a Quantum Heat Engine Using a Single-Spin Qubit. [PDF]
Physical Review Letters, 2020 A quantum two-level system with periodically modulated energy splitting could provide a minimal universal quantum heat machine. We present the experimental realization and the theoretical description of such a two-level system as an impurity electron ...
K. Ono +4 more
semanticscholar +1 more source
Optimization of an active heat engine [PDF]
Physical Review E, 2021 Optimisation of heat engines at the micro-scale has applications in biological and artificial nano-technology, and stimulates theoretical research in non-equilibrium statistical physics. Here we consider non-interacting overdamped particles confined by an external harmonic potential, in contact either with a thermal reservoir or with a stochastic self ...
Gronchi G, Puglisi A
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Finite-time quantum Stirling heat engine [PDF]
New Journal of Physics, 2020 We study the thermodynamic performance of a finite-time non-regenerative quantum Stirling-like cycle used as a heat engine. We consider specifically the case in which the working substance (WS) is a two-level system (TLS).
S. Raja +4 more
semanticscholar +1 more source
A many-body heat engine at criticality [PDF]
Quantum Science and Technology, 2020 We show that a quantum Otto cycle in which the medium, an interacting ultracold gas, is driven between a superfluid and an insulating phase can outperform similar single particle cycles. The presence of an energy gap between the two phases can be used to
Thomás Fogarty, T. Busch
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Holographic heat engines as quantum heat engines [PDF]
Classical and Quantum Gravity, 2020 Certain solutions of Einstein's equations in anti-de Sitter spacetime can be engineered, using extended gravitational thermodynamics, to yield `holographic heat engines', devices that turn heat into useful mechanical work. On the other hand, there are constructions (both experimental and theoretical) where a series of operations is performed on a small
openaire +3 more sources
Optimal operation of a three-level quantum heat engine and universal nature of efficiency [PDF]
Physical Review Research, 2020 We present a detailed study of a three-level quantum heat engine operating at maximum efficient power function, a trade-off objective function defined by the product of the efficiency and power output of the engine. First, for near equilibrium conditions,
Varinder Singh
semanticscholar +1 more source
RSC Advances, 2023 In the present analysis, we study the energy transference through engine oil-based Prandtl–Eyring nanofluid flow through a heated stretching surface. The nanofluid is prepared by adding copper (Cu) and titanium dioxide (TiO2) nanoparticles (NPs) to the ...
Z. Shah, M. Rooman, Meshal Shutaywi
semanticscholar +1 more source
Geometrical formulation of adiabatic pumping as a heat engine [PDF]
, 2020 We investigate a heat engine under an adiabatic (Thouless) pumping process. In this process, the extracted work and lower bound on dissipated availability are characterized by a vector potential and a Riemannian metric, respectively.
Y. Hino, H. Hayakawa
semanticscholar +1 more source