Zobrazeno 1 - 10
of 105
pro vyhledávání: '"de Oliveira, Thiago. R."'
Autor:
Passos, M. R., de Oliveira, Thiago R.
Understanding how macroscopic systems exhibit irreversible thermal behavior has been a long-standing challenge, first brought to prominence by Boltzmann. Recent advances have established rigorous conditions for isolated quantum systems to equilibrate
Externí odkaz:
http://arxiv.org/abs/2410.07429
We study the performance of a quantum Otto heat engine with two spins coupled by a Heisenberg interaction, taking into account not only the mean values of work and efficiency but also their fluctuations. We first show that, for this system, the outpu
Externí odkaz:
http://arxiv.org/abs/2312.12350
It is usually expected and observed that non-integrable isolated quantum systems thermalize. However, for some non-integrable spin chain models, in a numerical study, initial states with oscillations that persisted for some time were found and the ph
Externí odkaz:
http://arxiv.org/abs/2310.13392
Autor:
Correia, Pedro S., Carvalho, Gabriel Dias, de Oliveira, Thiago R., Vallejos, Raúl O., de Melo, Fernando
Publikováno v:
Phys. Rev. Lett. 133, 060401 (2024)
With the control of ever more complex quantum systems becoming a reality, new scenarios are emerging where generalizations of the most foundational aspects of statistical quantum mechanics are imperative. In such experimental scenarios the often natu
Externí odkaz:
http://arxiv.org/abs/2308.16330
Autor:
Carvalho, Gabriel Dias, Prazeres, Luis Fernando dos, Correia, Pedro Silva, de Oliveira, Thiago R
Publikováno v:
Gabriel D. Carvalho, Luis F. dos Prazeres, Pedro S. Correia, Thiago R. de Oliveira, Physics Letters A, Volume 494, 2024, 129276
Many theoretical and experimental results show that even isolated quantum systems evolving unitarily may equilibrate, since the evolution of some observables may be around an equilibrium value with negligible fluctuations most of the time. There are
Externí odkaz:
http://arxiv.org/abs/2305.11985
Autor:
Cruz, Clebson, Rastegar-Sedehi, Hamid-Reza, Anka, Maron F., de Oliveira, Thiago R., Reis, Mario
Publikováno v:
Quantum Sci. Technol. 8 035010, 2023
Low-dimensional metal complexes are versatile materials with tunable physical and chemical properties that make these systems promising platforms for caloric applications. In this context, this work proposes a quantum Stirling cycle based on a dinucl
Externí odkaz:
http://arxiv.org/abs/2208.14548
Publikováno v:
In Physica A: Statistical Mechanics and its Applications 1 November 2024 653
We study a quantum Otto cycle that uses a 2-qubit working substance whose Hamiltonian does not commute with itself at different times during unitary strokes. We investigate how the cycle responds to the loss of quantum adiabaticity when these strokes
Externí odkaz:
http://arxiv.org/abs/2201.01664
Publikováno v:
Phys. Rev. A 104, 052223 (2021)
We discuss the local equilibration of closed systems using the relative purity, a paradigmatic information-theoretic distinguishability measure that finds applications ranging from quantum metrology to quantum speed limits. First we obtain an upper b
Externí odkaz:
http://arxiv.org/abs/2108.05936
Publikováno v:
Physical Review E (Vol. 104, No. 5, 2021)
We compare quantum Otto engines based on two different cycle models: a two-bath model, with a standard heat source and sink, and a measurement-based protocol, where the role of heat source is played by a quantum measurement. We furthermore study thes
Externí odkaz:
http://arxiv.org/abs/2108.02229