Zobrazeno 1 - 10
of 99
pro vyhledávání: '"Souza, Alexandre M."'
Autor:
Castro, Erick R., Martins, Eldues O., Sarthour, Roberto S., Souza, Alexandre M., Oliveira, Ivan S.
Publikováno v:
Front. Phys., 26 September 2024 Sec. Quantum Engineering and Technology
Recent advancements in quantum computing and quantum-inspired algorithms have sparked renewed interest in binary optimization. These hardware and software innovations promise to revolutionize solution times for complex problems. In this work, we prop
Externí odkaz:
http://arxiv.org/abs/2309.09933
Autor:
Melo, Filipe V., Sá, Nahum, Roditi, Ithzak, Landi, Gabriel T., Souza, Alexandre M., Oliveira, Ivan S., Sarthour, Roberto S.
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:
http://arxiv.org/abs/2203.13773
Autor:
Micadei, Kaonan, Peterson, John P. S., Souza, Alexandre M., Sarthour, Roberto S., Oliveira, Ivan S., Landi, Gabriel T., Serra, Roberto M., Lutz, Eric
Publikováno v:
Phys. Rev. Lett. 127, 180603 (2021)
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:
http://arxiv.org/abs/2012.06294
Autor:
Souza, Alexandre M.
Publikováno v:
Quantum Information Processing volume 20, Article number: 237 (2021)
Dynamical decoupling is a technique that protects qubits against noise. The ability to preserve quantum coherence in the presence of noise is essential for the development of quantum devices. Here the Rigetti quantum computing platform was used to te
Externí odkaz:
http://arxiv.org/abs/2006.10585
Autor:
Souza, Alexandre M., Martins, Eldues O., Roditi, Itzhak, Sá, Nahum, Sarthour, Roberto S., Oliveira, Ivan S.
Publikováno v:
Front. Phys., 18 January 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:
http://arxiv.org/abs/2005.02846
Akademický článek
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Autor:
Santos, Alan C., Nicotina, Amanda, de Souza, Alexandre M., Sarthour, Roberto S., Oliveira, Ivan S., Sarandy, Marcelo S.
Publikováno v:
EPL (Europhysics Letters) 129, 30008 (2020)
High performance quantum information processing requires efficient control of undesired decohering effects, which are present in realistic quantum dynamics. To deal with this issue, a powerful strategy is to employ transitionless quantum driving (TQD
Externí odkaz:
http://arxiv.org/abs/1906.08065
Publikováno v:
In Journal of Magnetism and Magnetic Materials 1 January 2023 565
Autor:
de Assis, Rogério J., de Mendonça, Taysa M., Villas-Boas, Celso J., de Souza, Alexandre M., Sarthour, Roberto S., Oliveira, Ivan S., de Almeida, Norton G.
Publikováno v:
Phys. Rev. Lett. 122, 240602 (2019)
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 temperature i.e., when the spin system presents population inversion. We show
Externí odkaz:
http://arxiv.org/abs/1811.02917
Autor:
Peterson, John P. S., Batalhão, Tiago B., Herrera, Marcela, Souza, Alexandre M., Sarthour, Roberto S., Oliveira, Ivan S., Serra, Roberto M.
Publikováno v:
Phys. Rev. Lett. 123, 240601 (2019)
Developments in the thermodynamics of small quantum systems envisage non-classical thermal machines. In this scenario, energy fluctuations play a relevant role in the description of irreversibility. We experimentally implement a quantum heat engine b
Externí odkaz:
http://arxiv.org/abs/1803.06021