Fluctuation theorems (FTs), which describe some universal properties of nonequilibrium fluctuations, are examined from a quantum perspective and derived by introducing two-point measurement on the system. FTs for closed open systems driven out equilibrium an external time-dependent force, maintained in steady-state boundary conditions, unified approach. Applications to fermion boson transport junctions discussed. Quantum master equations Green's functions techniques computing energy particle...

We study the efficiency at maximum power, η*, of engines performing finite-time Carnot cycles between a hot and cold reservoir temperatures Th Tc, respectively. For reaching ηC=1-Tc/Th in reversible limit (long cycle time, zero dissipation), we find low dissipation that η* is bounded from above by ηC/(2-ηC) below ηC/2. These bounds are reached when ratio during isothermal phases tend, respectively, to or infinity. symmetric (ratio one) Curzon-Ahlborn ηCA=1-√Tc/Th] recovered.

We derive an exact (classical and quantum) expression for the entropy production of a finite system placed in contact with one or several reservoirs each which is initially described by canonical equilibrium distribution. Whereas total plus conserved, we show that always positive direct measure system-reservoir correlations and/or entanglements. Using exactly solvable quantum model, illustrate our novel interpretation Second Law microscopically reversible finite-size setting, strong coupling...

We investigate the efficiency of power generation by thermochemical engines. For strong coupling between particle and heat flows in presence a left-right symmetry system, we demonstrate that at maximum displays universality up to quadratic order deviation from equilibrium. A maser model is presented illustrate our argument.

The total entropy production of a trajectory can be split into an adiabatic and non-adiabatic contribution, deriving respectively from the breaking detailed balance via nonequilibrium boundary conditions or by external driving. We show that each them, total, entropy, separately satisfies fluctuation theorem.

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

A general formulation of stochastic thermodynamics is presented for open systems exchanging energy and particles with multiple reservoirs. By introducing a partition in terms "macrostates" (e.g. sets "microstates"), the consequence on thermodynamic description system studied detail. When microstates within macrostates rapidly thermalize, entire structure microscopic theory recovered at macrostate level. This not case when these remain out equilibrium leading to additional contributions...

We expand the standard thermodynamic framework of a system coupled to thermal reservoir by considering stream independently prepared units repeatedly put into contact with system. These can be in any nonequilibrium state and interact an arbitrary strength duration. show that this constitutes effective resource free energy identify conditions under which it behaves as heat, work or information reservoir. also setup provides natural analyze erasure ("Landauer's principle") feedback controlled...

We propose a formulation of stochastic thermodynamics for systems subjected to nonequilibrium constraints (i.e. broken detailed balance at steady state) and furthermore driven by external time-dependent forces. A splitting the second law occurs in this description leading three second-law-like relations. The general results are illustrated on specific solvable models. present paper uses master equation based approach.

We identify the operational conditions for maximum power of a nanothermoelectric engine consisting single quantum level embedded between two leads at different temperatures and chemical potentials. The corresponding thermodynamic efficiency agrees with Curzon-Ahlborn expression up to quadratic terms in gradients, supporting thesis universality beyond linear response.

Information manipulation such as copying and erasing has associated thermodynamic implications. Scientists develop a unified framework describing the thermodynamics of information processing, suggesting that their analyses might be useful for biological sensing.

We present a physical implementation of Maxwell demon which consists conventional single electron transistor (SET) capacitively coupled to another quantum dot detecting its state. Altogether, the system is described by stochastic thermodynamics. identify regime where energetics SET not affected detection, but coarse-grained entropy production shown contain new contribution compared isolated SET. This additional can be identified as information flow generated ``Maxwell demon'' feedback in an...

We evaluate the efficiency at maximum power of a quantum-dot Carnot heat engine. The universal value coefficients linear and quadratic order in temperature gradient are reproduced. Curzon-Ahlborn is recovered limit weak dissipation.

A quantum master equation (QME) is derived for the many-body density matrix of an open current-carrying system weakly coupled to two metal leads. The dynamics and steady-state properties arbitrary bias are studied using projection operator techniques, which keep track number electrons in system. We show that coherences between states with different electrons, n, (Fock space coherences) do not contribute transport second order system-lead coupling. However, same n may effect when damping rate...

The total entropy production is the sum of two contributions, so-called adiabatic and nonadiabatic productions, each which non-negative. We derive their explicit expressions for continuous Markovian processes, discuss properties, illustrate behavior on exactly solvable models.

We establish the foundations of a nonequilibrium theory quantum thermodynamics for noninteracting open systems strongly coupled to their reservoirs within framework Green functions (NEGF). The energy system and its coupling are controlled by slow external time-dependent force treated first order beyond quasistatic limit. derive four basic laws characterize reversible transformations. Stochastic is recovered in weak

We derive the statistics of efficiency under assumption that thermodynamic fluxes fluctuate with normal law, parametrizing it in terms time, macroscopic efficiency, and a coupling parameter $\zeta$. It has peculiar behavior: No moments, one sub- super-Carnot maxima corresponding to reverse operating regimes (engine/pump), most probable decreasing time. The limit $\zeta\to 0$ where Carnot bound can be saturated gives rise two extreme situations, machine works at its no entropy production, for...

We study heat transfers in a single level quantum dot strongly coupled to fermionic reservoirs and subjected time-dependent protocol modulating the energy as well dot-reservoir coupling strength. The dynamics is described using nonequilibrium Greens functions (NEGFs) evaluated first order beyond quasi-static driving. show that any definition expressed an change reservoir plus fraction of system-reservoir interaction not exact differential when along reversible isothermal transformations,...

We build a rigorous nonequilibrium thermodynamic description for open chemical reaction networks of elementary reactions. Their dynamics is described by deterministic rate equations with mass action kinetics. Our most general framework considers driven time-dependent chemostats. The energy and entropy balances are established Gibbs free introduced. difference between this latter its equilibrium form represents the minimal work done chemostats to bring network state. It minimized in nondriven...

We connect two recent advances in the stochastic analysis of nonequilibrium systems: (loose) uncertainty principle for currents, which states that statistical errors are bounded by thermodynamic dissipation, and consistency currents light symmetries. Employing large deviation techniques presented Gingrich et al. [Phys. Rev. Lett. 116, 120601 (2016)] Pietzonka, Barato, Seifert E 93, 052145 (2016)], we provide a short proof loose principle, prove tighter relation class thermodynamically...