References of "Epl"
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See detailExtracting maximum power from active colloidal heat engines
Martin, D.; Nardini, C.; Cates, M. E. et al

in EPL (2018), 121(6),

Colloidal heat engines extract power out of a fluctuating bath by manipulating a confined tracer. Considering a self-propelled tracer surrounded by a bath of passive colloids, we optimize the engine ... [more ▼]

Colloidal heat engines extract power out of a fluctuating bath by manipulating a confined tracer. Considering a self-propelled tracer surrounded by a bath of passive colloids, we optimize the engine performances based on the maximum available power. Our approach relies on an adiabatic mean-field treatment of the bath particles which reduces the many-body description into an effective tracer dynamics. It leads us to reveal that, when operated at constant activity, an engine can only produce less maximum power than its passive counterpart. In contrast the output power of an isothermal engine, operating with cyclic variations of the self-propulsion without any passive equivalent exhibits an optimum in terms of confinement and activity. Direct numerical simulations of the microscopic dynamics support the validity of these results even beyond the mean-field regime, with potential relevance to the design of experimental engines. Copyright (C) EPLA 2018 [less ▲]

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See detailCollective effects enhancing power and efficiency
Vroylandt, Hadrien; Verley, Gatien; Esposito, Massimiliano UL

in EPL (2017)

Energy conversion is most efficient for micro or nano machines with tight coupling between input and output power. To reach meaningful amounts of power, ensembles of N such machines must be considered. We ... [more ▼]

Energy conversion is most efficient for micro or nano machines with tight coupling between input and output power. To reach meaningful amounts of power, ensembles of N such machines must be considered. We use a model system to demonstrate that interactions between N tightly coupled nanomachines can enhance the power output per machine. Furthermore, while interactions break tight coupling and thus lower efficiency in finite ensembles, the macroscopic limit (N → ∞) restores it and enhances both the efficiency and the output power per nanomachine. [less ▲]

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See detailNonequilibrium dissipation in living oocytes
Fodor, Etienne UL; Ahmed, W. W.; Almonacid, M. et al

in EPL (2016), 116(3),

Living organisms are inherently out-of-equilibrium systems. We employ recent developments in stochastic energetics and rely on a minimal microscopic model to predict the amount of mechanical energy ... [more ▼]

Living organisms are inherently out-of-equilibrium systems. We employ recent developments in stochastic energetics and rely on a minimal microscopic model to predict the amount of mechanical energy dissipated by such dynamics. Our model includes complex rheological effects and nonequilibrium stochastic forces. By performing active microrheology and tracking micronsized vesicles in the cytoplasm of living oocytes, we provide unprecedented measurements of the spectrum of dissipated energy. We show that our model is fully consistent with the experimental data and we use it to offer predictions for the injection and dissipation energy scales involved in active fluctuations. Copyright (C) EPLA, 2016 [less ▲]

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See detailActivity-driven fluctuations in living cells
Fodor, Etienne UL; Guo, M.; Gov, N. S. et al

in EPL (2015), 110(4),

We propose a model for the dynamics of a probe embedded in a living cell, where both thermal fluctuations and nonequilibrium activity coexist. The model is based on a confining harmonic potential ... [more ▼]

We propose a model for the dynamics of a probe embedded in a living cell, where both thermal fluctuations and nonequilibrium activity coexist. The model is based on a confining harmonic potential describing the elastic cytoskeletal matrix, which undergoes random active hops as a result of the nonequilibrium rearrangements within the cell. We describe the probe's statistics and we bring forth quantities affected by the nonequilibrium activity. We find an excellent agreement between the predictions of our model and experimental results for tracers inside living cells. Finally, we exploit our model to arrive at quantitative predictions for the parameters characterizing nonequilibrium activity such as the typical time scale of the activity and the amplitude of the active fluctuations. Copyright (C) EPLA, 2015 [less ▲]

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See detailSecond law and Landauer principle far from equilibrium
Esposito, Massimiliano UL; Van den Broeck, C.

in Epl (2011), 95(4),

The amount of work that is needed to change the state of a system in contact <br /><br />with a heat bath between specified initial and final nonequilibrium states is at least equal to the <br /><br ... [more ▼]

The amount of work that is needed to change the state of a system in contact <br /><br />with a heat bath between specified initial and final nonequilibrium states is at least equal to the <br /><br />corresponding equilibrium free energy difference plus (respectively, minus) temperature times the <br /><br />information of the final (respectively, the initial) state relative to the corresponding equilibrium <br /><br />distributions. [less ▲]

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See detailOn the relation between event-based and time-based current statistics
Esposito, Massimiliano UL; Lindenberg, K.; Sokolov, I. M.

in Epl (2010), 89(1),

Current statistics can be calculated in various ways. Event-based approaches use the statistics of the number of events occurring during a given time. Time-based approaches use the statistics of the time ... [more ▼]

Current statistics can be calculated in various ways. Event-based approaches use the statistics of the number of events occurring during a given time. Time-based approaches use the statistics of the time needed to reach a given number of events. By analyzing normal as well as anomalous statistics of nonequilibrium currents through a two level system in contact with two different reservoirs, we investigate the conditions under which these different statistics do or do not yield identical predictions. We rely on the continuous time random walk formulation introduced in our earlier work (Phys. Rev. E, 77 (2008) 051119). [less ▲]

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See detailFinite-time thermodynamics for a single-level quantum dot
Esposito, Massimiliano UL; Kawai, R.; Lindenberg, K. et al

in Epl (2010), 89(2),

We investigate the finite-time thermodynamics of a single-level fermion system interacting with a particle reservoir. The optimal protocol to extract the maximum work from the system when moving the ... [more ▼]

We investigate the finite-time thermodynamics of a single-level fermion system interacting with a particle reservoir. The optimal protocol to extract the maximum work from the system when moving the single energy level between an initial higher value and a final lower value in a finite time is calculated from a quantum master equation. The calculation also yields the optimal protocol to raise the energy level with the expenditure of the least amount of work on the system. The optimal protocol displays discontinuous jumps at the initial and final times. [less ▲]

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See detailThermoelectric efficiency at maximum power in a quantum dot
Esposito, Massimiliano UL; Lindenberg, K.; Van den Broeck, C.

in Epl (2009), 85(6),

Detailed reference viewed: 80 (1 UL)