152 citations · 228 across the 7 of their papers we have counts for
9 papers
Coherence-Preserving Fluctuation Diagnostics for an Engineered Population-Inverted Qubit Otto Engine
Gabriella G. Damas, Norton G. de Almeida, Gao Xianlong +1
Finite-time quantum thermal machines require diagnostics beyond average work and efficiency, because microscopic engines operate in regimes where fluctuations, incomplete thermaliz…
Probing the Limits of Dispersive Quantum Thermometry with a Nonlinear Mach-Zehnder-Based Quantum Simulator
Daniel Y. Akamatsu, Lucas Ferreira R. de Moura, Gabriella G. Damas +3
Temperature estimation, known as thermometry, is a critical sensing task for physical systems operating in the quantum regime. Indeed, thermal fluctuations can significantly degrad…
Quantum Features of the Thermal Two-Qubit Quantum Rabi Model in Ultra- and Deep-Strong Regimes
Ciro Micheletti Diniz, Gabriella G. Damas, Norton G. de Almeida +2
Quantum correlations and non-classical states are indispensable resources for advancing quantum technologies, and their resilience at finite temperatures is crucial for practical e…
A quantum Otto-type heat engine with fixed frequency
Richard Q. Matos, Rogerio J. de Assis, Norton G. de Almeida
In this work, we analyze an Otto-type cycle operating with a working substance composed of a quantum harmonic oscillator (QHO). Unlike other studies in which the work extraction is…
Quantum Otto Thermal Machines Powered by Kerr Nonlinearity
Udson C. Mendes, José S. Sales, Norton G. de Almeida
We study the effect of Kerr nonlinearity in quantum thermal machines having a Kerr-nonlinear oscillator as working substance and operating under the ideal quantum Otto cycle. We fi…
Universal two-level quantum Otto machine under a squeezed reservoir
Rogério J. de Assis, José S. Sales, Jefferson A. R. da Cunha +1
We study an Otto heat machine whose working substance is a single two-level system interacting with a cold thermal reservoir and with a squeezed hot thermal reservoir. By adjusting…
Efficiency of a quantum Otto heat engine operating under a reservoir at effective negative temperatures
Rogério J. de Assis, Taysa M. de Mendonça, Celso J. Villas-Boas +4
Abstract We perform an experiment in which a quantum heat engine works under two reservoirs, one at a positive spin temperature and the other at an effective negative spin temperat…
Feasible platform to study negative temperatures
R. J. de Assis, C. J. Villas-Boas, N. G. de Almeida
We afford an experimentally feasible platform to study Boltzmann negative temperatures. Our proposal takes advantage of well-known techniques of engineering Hamiltonian to achieve…
Quantum work for sudden quenches in Gaussian random Hamiltonians
Eric G. Arrais, Diego A. Wisniacki, Lucas C. Céleri +3
In the context of nonequilibrium quantum thermodynamics, variables like work behave stochastically. A particular definition of the work probability density function (pdf) for coher…