Zobrazeno 1 - 10
of 1 321
pro vyhledávání: '"Martorell J"'
Publikováno v:
New J. Phys.18, 075005 (2016)
We present the properties of the ground state and low-energy excitations of Bose-Hubbard chains with a geometry that varies from open to closed and with a tunable twisted link. In the vicinity of the symmetric $\pi-$flux case the system behaves as an
Externí odkaz:
http://arxiv.org/abs/1605.00458
Autor:
Alday, A., Andrés, A.G., Angelats, C.M., Aquino, E., Astete, J., Baena, I., Barasoain, A., Bello, P., Benito, C., Benito, H., Botifoll, E., Burguera, B., Campos, C., Canduela, V., Clerigué, N., Comalrena, C., Del Campo, T., De Miguel, B., Fernández, R., Fernández, B., García, E., García, M., García, M.A., García-Vao, C., Herrero, L., Huerta, P., Humayor, J., Hurtado, P., Iturralde, I., Jordá, A., Khodayar, P., Lalinde, M., Lobato, Z., López, J., López, V., Luaces, C., Mangione, L., Martín, L., Martínez S., L., Martínez, L., Martorell, J., May, M.E., Melguizo, M.C., Mesa, S., Molina, J.C., Muñiz, M., Muñoz, J.A., Muñoz, N., Oliva, S., Palacios, M., Pérez, A., Pérez, C., Pinyot, M., Peñalba, A., Pociello, N., Rodríguez, A., Rodríguez, M.D., Señer, R., Serrano, I., Vázquez, P., Vidal, C., Martínez-Sánchez, Lidia *, López-Ávila, Javier, Barasoain-Millán, Alberto, Angelats-Romero, Carlos Miguel, Azkunaga-Santibañez, Beatriz, Molina-Cabañero, Juan Carlos
Publikováno v:
In Anales de Pediatría (English Edition) May 2021 94(5):285-292
Publikováno v:
New J. Phys. 17 (2015) 073014
We consider a Bose-Hubbard trimer, i.e. an ultracold Bose gas populating three quantum states. The latter can be either different sites of a triple-well potential or three internal states of the atoms. The bosons can tunnel between different states w
Externí odkaz:
http://arxiv.org/abs/1501.03306
Publikováno v:
Phys. Rev. A 88, 043647 (2013)
We extend a recent method to shortcut the adiabatic following to internal bosonic Josephson junctions in which the control parameter is the linear coupling between the modes. The approach is based on the mapping between the two-site Bose-Hubbard Hami
Externí odkaz:
http://arxiv.org/abs/1309.2491
Exact analytical results (in terms of Bessel functions) for the bandgaps, reflectance, and transmittance of one-dimensional photonic crystals with a sawtooth refractive index profile on the period are derived for the first time. This extends a group
Externí odkaz:
http://arxiv.org/abs/1303.2267
Publikováno v:
Opt. Express 21, A336-A354 (2013)
We compute the short-circuit diffusion current of excitons in an organic solar cell, with special emphasis on fluorescence losses. The exciton diffusion length is not uniform but varies with its position within the device, even with moderate fluoresc
Externí odkaz:
http://arxiv.org/abs/1301.6503
Publikováno v:
Phys. Rev. A 86, 063623 (2012)
We describe methods for fast production of highly coherent-spin-squeezed many-body states in bosonic Josephson junctions (BJJs). We start from the known mapping of the two-site Bose-Hubbard (BH) Hamiltonian to that of a single effective particle evol
Externí odkaz:
http://arxiv.org/abs/1207.1483
Publikováno v:
Phys. Rev. A 86, 023615 (2012)
We analyze the formation of squeezed states in a condensate of ultracold bosonic atoms confined by a double-well potential. The emphasis is set on the dynamical formation of such states from initially coherent many-body quantum states. Two cases are
Externí odkaz:
http://arxiv.org/abs/1205.6756
Publikováno v:
Phys. Rev. A 82, 063626 (2010
We examine the dynamics of a Bose-Einstein condensate in a symmetric double-well potential for a broad range of non-linear couplings. We demonstrate the existence of a region, beyond those of Josephson oscillations and self-trapping, which involves t
Externí odkaz:
http://arxiv.org/abs/1012.1023
Publikováno v:
Phys. Rev. A 81, 063625 (2010)
An analytical insight into the symmetry breaking mechanisms underlying the transition from Josephson to self-trapping regimes in Bose-Einstein condensates is presented. We obtain expressions for the ground state properties of the system of a gas of a
Externí odkaz:
http://arxiv.org/abs/1005.2203