Zobrazeno 1 - 10
of 540
pro vyhledávání: '"Ribeiro,G. P."'
Autor:
Tavares, T. S., Ribeiro, G. A. P.
We consider the interaction-round-a-face version of the isotropic six-vertex model. The associated spin chain is made of two coupled Heisenberg spin chains with different boundary twists. The phase diagram of the model and the long distance correlati
Externí odkaz:
http://arxiv.org/abs/2409.05814
Autor:
Ribeiro, G. A. P., Rigolin, Gustavo
Publikováno v:
Phys. Rev. B 109, 245122 (2024)
We comparatively study three of the most useful quantum information tools to detect quantum critical points (QCPs) when only finite temperature data are available. We investigate quantitatively how the quantum discord, the quantum teleportation based
Externí odkaz:
http://arxiv.org/abs/2406.10178
Autor:
Ribeiro, G. A. P., Rigolin, Gustavo
We show that the teleportation protocol can be efficiently used to detect quantum critical points using finite temperature data even if all resources needed to its implementation lie within the system under investigation. Contrary to a previous propo
Externí odkaz:
http://arxiv.org/abs/2403.10193
In this paper, we introduce the notions of $\alpha$-quasicomplemented and totally $\alpha$-quasicomplemented subspaces and we established some results under these contexts. We show, for example, that if $X$ is a separable or reflexive Banach space an
Externí odkaz:
http://arxiv.org/abs/2403.05806
Autor:
Ribeiro, G. A. P., Rigolin, Gustavo
Publikováno v:
Phys. Rev. A 109, 012612 (2024)
In [Phys. Rev. A 107, 052420 (2023)] we showed that the quantum teleportation protocol can be used to detect quantum critical points (QCPs) associated with a couple of different classes of quantum phase transitions, even when the system is away from
Externí odkaz:
http://arxiv.org/abs/2311.00105
Autor:
Tavares, T. S., Ribeiro, G. A. P.
Publikováno v:
Nucl. Phys. B, 995 (2023) 116333
We consider the interaction-round-a-face version of the six-vertex model for arbitrary anisotropy parameter, which allow us to derive an integrable one-dimensional quantum Hamiltonian with three-spin interactions. We apply the quantum transfer matrix
Externí odkaz:
http://arxiv.org/abs/2307.11279
Autor:
Ribeiro, G. A. P., Rigolin, Gustavo
Publikováno v:
Phys. Rev. A 107, 052420 (2023)
We show that the quantum teleportation protocol is a powerful tool to study quantum phase transitions (QPTs) at finite temperatures. We consider a pair of spins from an infinite spin-1/2 chain (XXZ model) in equilibrium with a reservoir at temperatur
Externí odkaz:
http://arxiv.org/abs/2304.02448
Autor:
Ribeiro, G. A. P.
We study the partition function per site of the integrable $Sp(2n)$ vertex model on the square lattice. We establish a set of transfer matrix fusion relations for this model. The solution of these functional relations in the thermodynamic limit allow
Externí odkaz:
http://arxiv.org/abs/2211.06487
Autor:
Syndikus, I., Petri, M., Macchiavelli, A. O., Paschalis, S., Bertulani, C. A., Aumann, T., Alvarez-Pol, H., Atar, L., Beceiro-Novo, S., Benlliure, J., Boillos, J. M., Boretzky, K., Borge, M. J. G., Brown, B. A., Caamaño, M., Caesar, C., Casarejos, E., Catford, W., Cederkall, J., Chulkov, L. V., Cortina-Gil, D., Cravo, E., Crespo, R., Dillmann, I., Fernández, P. Díaz, Elekes, Z., Enders, J., Farinon, F., Fraile, L. M., Redondo, D. Galaviz, Geissel, H., Gernhäuser, R., Golubev, P., Göbel, K., Heil, M., Heine, M., Heinz, A., Henriques, A., Holl, M., Johansson, H. T., Jonson, B., Kalantar-Nayestanaki, N., Kanungo, R., Kelic-Heil, A., Kröll, T., Kurz, N., Langer, C., Bleis, T. Le, Machado, J. F. D. C., Marganiec-Gałazka, J., Nacher, E., Nilsson, T., Nociforo, C., Panin, V., Perea, A., Pietri, S. B., Plag, R., Reifarth, R., Revel, A., Ribeiro, G., Rigollet, C., Rossi, D. M., Savran, D., Scheit, H., Simon, H., Sorlin, O., Tengblad, O., Togano, Y., Vandebrouck, M., Volkov, V., Wheldon, F. Wamers C., Wilson, G. L., Winfield, J. S., Weick, H., Woods, P., Yakorev, D., Zhukov, M., Zilges, A., Zuber, K.
Publikováno v:
PhysicsLetters B809 (2020) 135748
The evolution of the traditional nuclear magic numbers away from the valley of stability is an active field of research. Experimental efforts focus on providing key spectroscopic information that will shed light into the structure of exotic nuclei an
Externí odkaz:
http://arxiv.org/abs/2008.10126
Autor:
Ribeiro, G. A. P.
Publikováno v:
Nucl. Phys. B, 957 (2020) 115106
We study the correlation functions of the integrable $O(n)$ spin chain in the thermodynamic limit. We addressed the problem of solving functional equations of the quantum Knizhnik Zamolodchikov type for density matrix related to the $O(n)$ spin chain
Externí odkaz:
http://arxiv.org/abs/2005.09268