10 citations · 25 across the 11 of their papers we have counts for
8 papers · 1 filter
Entropy-based analysis of single-qubit Otto and Carnot heat engines
Andrés Vallejo, Catty Lissardy, Santiago Silva-Gallo +2
From an entropy-based formulation of the first law of thermodynamics in the quantum regime, we investigate the performance of Otto-like and Carnot-like engines for a single-qubit w…
Evolution of expected values in open quantum systems
Andrés Vallejo, Alejandro Romanelli, Virginia Feldman +1
We derive a generalization of Ehrenfest theorem valid for open quantum systems. From this result, we identify three contributions to the evolution of expected values: i) the explic…
Qubit thermodynamics far from equilibrium: two perspectives about the nature of heat and work in the quantum regime
Andrés Vallejo, Alejandro Romanelli, Raúl Donangelo
Considering an entropy-based division of energy transferred into heat and work, we develop an alternative theoretical framework for the thermodynamic analysis of two-level systems.…
Temperature of a finite-dimensional quantum system
Andrés Vallejo, Alejandro Romanelli, Raúl Donángelo
A general expression for the temperature of a finite-dimensional quantum system is deduced from thermodynamic arguments. At equilibrium, this magnitude coincides with the standard…
Entropy production in the quantum walk
Andrés Vallejo, Alejandro Romanelli, Raúl Donangelo +1
We explore the notion of generated entropy in open quantum systems. We focus on the study of the discrete-time quantum walk on the line, from the entropy production perspective. We…
Out-of-equilibrium quantum thermodynamics in the Bloch sphere: temperature and internal entropy production
Andrés Vallejo, Alejandro Romanelli, Raúl Donangelo
An explicit expression for the temperature of an open two-level quantum system is obtained as a function of local properties, under the hypothesis of weak interaction with the envi…
Initial-state-dependent thermalization in open qubits
Andrés Vallejo, Alejandro Romanelli, Raul Donangelo
We study, from a thermodynamic perspective, the equilibrium states of a qubit interacting with an arbitrary environment of dimension N>>2. We show that even in presence of memory a…
Relation between the usual and the entanglement temperature, in a simple quantum system
Alejandro Romanelli, Raul Donangelo, Andrés Vallejo
We develop a thermodynamical theory to describe the behavior of the entanglement between a single two-level atom with a single mode of the electromagnetic field. The resonant Jayne…