# Irreversible work and inner friction in quantum thermodynamic processes.

@article{Plastina2014IrreversibleWA, title={Irreversible work and inner friction in quantum thermodynamic processes.}, author={Francesco Plastina and Antonio Alecce and Tony John George Apollaro and Giovanni Falcone and Gianluca Francica and Fernando Galve and N. Lo Gullo and Roberta Zambrini}, journal={Physical review letters}, year={2014}, volume={113 26}, pages={ 260601 } }

We discuss the thermodynamics of closed quantum systems driven out of equilibrium by a change in a control parameter and undergoing a unitary process. We compare the work actually done on the system with the one that would be performed along ideal adiabatic and isothermal transformations. The comparison with the latter leads to the introduction of irreversible work, while that with the former leads to the introduction of inner friction. We show that these two quantities can be treated on an… Expand

#### Figures and Topics from this paper

#### 82 Citations

Irreversible work and Maxwell demon in terms of quantum thermodynamic force

- Medicine
- Scientific reports
- 2021

The Second Law is properly extended to quantum processes by incorporating information explicitly into the Second Law and a thermodynamic operational meaning is provided for the flow and backflow of information. Expand

Irreversible work and internal friction in a quantum Otto cycle of a single arbitrary spin

- Physics
- 2017

Abstract
We propose an arbitrary driven spin as the working fluid of a quantum Otto cycle in the presence of internal friction. The role of total allocated time to the adiabatic branches of the… Expand

Quantum Otto cycle with inner friction: finite-time and disorder effects

- Physics
- 2015

The concept of inner friction, by which a quantum heat engine is unable to follow adiabatically its strokes and thus dissipates useful energy, is illustrated in an exact physical model where the… Expand

Quantum thermodynamics in adiabatic open systems and its trapped-ion experimental realization

- Physics
- 2019

Quantum thermodynamics aims at investigating both the emergence and the limits of the laws of thermodynamics from a quantum mechanical microscopic approach. In this scenario, thermodynamic processes… Expand

Irreversibility in a unitary finite-rate protocol: The concept of internal friction

- Physics
- 2016

The concept of internal friction, a fully quantum mechanical phenomena, is investigated in a simple, experimentally accessible quantum system in which a spin-1/2 is driven by a transverse magnetic… Expand

Nonequilibrium fluctuations of a quantum heat engine

- Physics
- 2021

The thermodynamic properties of quantum heat engines are stochastic owing to the presence of thermal and quantum fluctuations. We here experimentally investigate the efficiency and nonequilibrium… Expand

Experimental Characterization of a Spin Quantum Heat Engine.

- Physics, Medicine
- Physical review letters
- 2019

A quantum heat engine based on a spin-1/2 system and nuclear magnetic resonance techniques is experimentally implemented, able to reach an efficiency for work extraction very close to its thermodynamic limit. Expand

Quantum thermodynamics for driven dissipative bosonic systems

- Physics
- 2018

We investigate two prototypical dissipative bosonic systems under slow driving and arbitrary system-bath coupling strength, recovering their dynamic evolution as well as the heat and work rates, and… Expand

Quantum Carnot cycle with inner friction

- Computer Science, Physics
- Quantum Inf. Process.
- 2020

A single driven spin is investigated as the working substance of a six-stroke irreversible quantum Carnot cycle. The role of inner friction associated with the finite-time adiabatic transformations… Expand

Coupled quantum Otto heat engine and refrigerator with inner friction

- Computer Science, Physics
- Quantum Inf. Process.
- 2019

The effect known as the inner friction is found to negatively effect the performances of the quantum heat engine and the refrigerator and the strong frictional losses are found to induce inactive operation regimes where the mode of the cycle is neither a refrigerator nor a heat engine. Expand