Zobrazeno 1 - 10
of 107
pro vyhledávání: '"Ivan S Oliveira"'
Publikováno v:
New Journal of Physics, Vol 17, Iss 11, p 113012 (2015)
We reconstruct the time dependent quantum map corresponding to the relaxation process of a two-spin system in liquid-state NMR at room temperature. By means of quantum tomography techniques that handle informational incomplete data, we show how to pr
Externí odkaz:
https://doaj.org/article/584f51d0a665439aada64adcc36a4b6d
Publikováno v:
Results in Physics, Vol 44, Iss , Pp 106131- (2023)
In this work, using a Noisy Intermediate-Scale Quantum (NISQ) framework, we obtain the gap of a Bardeen–Cooper–Schrieffer (BCS) Hamiltonian. This could lead to interesting implications for superconductivity research. For such task, we choose to u
Externí odkaz:
https://doaj.org/article/48a1a94db7ab4c0b9fd60aa6c6f858b7
Autor:
Alexandre M. Souza, Eldues O. Martins, Itzhak Roditi, Nahum Sá, Roberto S. Sarthour, Ivan S. Oliveira
Publikováno v:
Frontiers in Physics, Vol 9 (2022)
Quantum computing, along with quantum metrology and quantum communication, are disruptive technologies that promise, in the near future, to impact different sectors of academic research and industry. Among the computational challenges with great inte
Externí odkaz:
https://doaj.org/article/656cdecdca814d5a83e71de818720857
Autor:
Kaonan Micadei, John P. S. Peterson, Alexandre M. Souza, Roberto S. Sarthour, Ivan S. Oliveira, Gabriel T. Landi, Tiago B. Batalhão, Roberto M. Serra, Eric Lutz
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-6 (2019)
The presence of correlations can strongly affect the evolution of a quantum system. Here, the authors directly observe differences in the dynamics of two spins-1/2 systems in an NMR setup depending on the correlations of the initial state, including
Externí odkaz:
https://doaj.org/article/f281c915d5ad4c05979c9dda888f3f71
Publikováno v:
Physics Open, Vol 6, Iss , Pp 100053- (2021)
We present an experimental quantum simulation of the two-site Hubbard Hamiltonian, using the NMR technique. By varying the ratio between the Coulomb interaction U and the kinetic energy Jh (U/Jh), it was possible to observe changes in the behavior of
Externí odkaz:
https://doaj.org/article/f5ad8a5f42dc40a687d6e0e22c2b63fc
Publikováno v:
Physica B: Condensed Matter. 653:414511
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::68602190b723521e8db359d1ca0a0d98
https://doi.org/10.1016/j.physb.2022.414511
https://doi.org/10.1016/j.physb.2022.414511
Autor:
Filipe V. Melo, Nahum Sá, Itzhak Roditi, Alexandre M. Souza, Ivan S. Oliveira, Roberto S. Sarthour, Gabriel T. Landi
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
We put forth a quantum simulation of a stroboscopic two-stroke thermal engine in the IBMQ processor. The system consists of a quantum spin chain connected to two baths at their boundaries, prepared at different temperatures using the variational quan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f66a99e0057c0eb1be81efd743d18cfb
http://arxiv.org/abs/2203.13773
http://arxiv.org/abs/2203.13773
Autor:
Emerson Serafim Barros, Ivan S. Oliveira, Vênia Camelo de Souza, Vagner Sousa da Costa, Paulo Marks de Araújo Costa
Publikováno v:
Brazilian Journal of Development. 6:30536-30545
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d736d93a407423a2f36b1facbca0c333
https://doi.org/10.34117/bjdv6n5-493
https://doi.org/10.34117/bjdv6n5-493
Publikováno v:
SSRN Electronic Journal.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a9e8e6057a4b624ba5ce95a0f2fe99b
https://doi.org/10.2139/ssrn.4212036
https://doi.org/10.2139/ssrn.4212036
Autor:
Gabriel T. Landi, Roberto S. Sarthour, Alexandre M. Souza, Roberto M. Serra, Ivan S. Oliveira, Kaonan Micadei, Eric Lutz, John P. S. Peterson
Publikováno v:
Physical Review Letters. 127
Fluctuation theorems are fundamental extensions of the second law of thermodynamics for small systems. Their general validity arbitrarily far from equilibrium makes them invaluable in nonequilibrium physics. So far, experimental studies of quantum fl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::981338a22070310c94d44816d73c524d
https://doi.org/10.1103/physrevlett.127.180603
https://doi.org/10.1103/physrevlett.127.180603