Zobrazeno 1 - 10
of 168
pro vyhledávání: '"OLIVEIRA, THIAGO R."'
Autor:
de Melo, Fernando, Carvalho, Gabriel Dias, Correia, Pedro S., Obando, Paola Concha, de Oliveira, Thiago R., Vallejos, Raúl O.
Quantum mechanics started out as a theory to describe the smallest scales of energy in Nature. After hundred years of development it is now routinely employed to describe, for example, quantum computers with thousands of qubits. This tremendous progr
Externí odkaz:
http://arxiv.org/abs/2411.07327
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
Autor:
Maia, Mayanne R., Jonathan, Daniel, Oliveira, Thiago R., Khoury, Antonio Z., Tasca, Daniel S.
Publikováno v:
Opt. Express 30, 27180-27195 (2022)
Interference is the mechanism through which waves can be structured into the most fascinating patterns. While for sensing, imaging, trapping, or in fundamental investigations, structured waves play nowadays an important role and are becoming subject
Externí odkaz:
http://arxiv.org/abs/2204.00915
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