We present a theoretical and numerical analysis of a quantum system that is capable of functioning as a heat engine. This system could be realized experimentally using cold bosonic atoms confined to a double well potential that is created by splitting a harmonic trap with a focused laser. The system shows thermalization, and can model a reversible heat engine cycle. This is the first demonstrat...

The fast development of the internet and the growth of digital contents available led to the development of search engines that facilitate the recovery of information in the Web. However, these engines have limitations mainly when recovering specialized contents. Geospatial data are created by local governments, companies and people, but these data aren’t available in a systematized way. In thi...

in this paper the design and implementation of fault tolerable architecture for scientific workflow engines is presented. the engines are assumed to be implemented as composite web services. current architectures for workflow engines do not make any considerations for substituting faulty web services with correct ones at run time. the difficulty is to rollback the execution state of the workflo...

The finite-time operation of a quantum heat engine that uses a single particle as a working medium generally increases the output power at the expense of inducing friction that lowers the cycle efficiency. We propose to scale up a quantum heat engine utilizing a many-particle working medium in combination with the use of shortcuts to adiabaticity to boost the nonadiabatic performance by elimina...

In this paper, we describe how text mining (TM) has been used to support frame analysis within the context of the ASSIST project. This technology is capable of retrieving knowledge from unstructured text and presenting it to researchers in a concise form. In the course of the ASSIST project, which is a collaboration between social researchers and text mining experts, we have designed and protot...

We study stochastic energetic exchanges in quantumheat engines. Due tomicroreversibility, these obey a fluctuation relation, called the heat enginefluctuation relation, which implies the Carnot bound: nomachine can have an efficiency greater thanCarnot’s efficiency. The stochastic thermodynamics of a quantumheat engine (including the joint statistics of heat andwork and the statistics of effici...

In this article we use geometric optimal control to completely solve the problem of minimum-time transitions between thermal equilibrium and fixed average energy states of the quantum parametric oscillator, a system which has been extensively used to model quantum heat engines and refrigerators. We subsequently use the obtained results to find the minimum driving time for a quantum refrigerator...

Abstract: The difference between quantum isoenergetic process and quantum isothermal process comes from the violation of the law of equipartition of energy in the quantum regime. To reveal an important physical meaning of this fact, here we study a special type of quantum heat engine consisting of three processes: isoenergetic, isothermal and adiabatic processes. Therefore, this engine works be...