Gustavo Deczka Telles
University of São Paulo
Magnetic fieldPhysicsHyperfine structureVortexExcited stateAtomic physicsMaterials scienceTurbulenceIonizationSuperfluidityTrap (computing)Condensed matter physicsTrappingMagneto-optical trapQuantum turbulenceQuantum electrodynamicsBose–Einstein condensateQuantum mechanicsRadiative transferExcitationQuantumHeteronuclear molecule
82Publications
11H-index
427Citations
Publications 75
Newest
#1Sergio Couto Martins (USP: University of São Paulo)
#2Leandro Alvares Machado (USP: University of São Paulo)
Last. Vanderlei Salvador Bagnato (USP: University of São Paulo)H-Index: 64
view all 6 authors...
Source
#1Axel U. J. LodeH-Index: 24
#2Marios C. TsatsosH-Index: 13
view all 7 authors...
Granulation of quantum matter -- the formation of persistent small-scale patterns -- is realized in the images of quasi-one-dimensional Bose-Einstein condensates perturbed by a periodically modulated interaction. Our present analysis of a mean-field approximation suggests that granulation is caused by the gradual transformation of phase undulations into density undulations. This is achieved by a suitably large modulation frequency, while for low enough frequencies the system exhibits a quasi-adi...
#1J. H. V. Nguyen (Rice University)H-Index: 1
#2Marios C. Tsatsos (USP: University of São Paulo)H-Index: 13
Last. Randall G. Hulet (Rice University)H-Index: 58
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We explore, both experimentally and theoretically, the response of an elongated Bose-Einstein condensate to modulated interactions. We identify two distinct regimes differing in modulation frequency and modulation strength. Longitudinal surface waves are generated either resonantly or parametrically for modulation frequencies near the radial trap frequency or twice the trap frequency, respectively. The dispersion of these waves, the latter being a Faraday wave, is well-reproduced by a mean-field...
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#1Ofir E. Alon (University of Haifa)H-Index: 34
#2Vanderlei Salvador Bagnato (USP: University of São Paulo)H-Index: 64
Last. Axel U. J. Lode (University of Vienna)H-Index: 24
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Bose-Einstein condensates (BECs) offer a fruitful, often uncharted ground for exploring physics of many-particle systems. In the present year of the MCTDHB project at the HLRS, we maintained and extended our investigations of BECs and interacting bosonic systems using the MultiConfigurational Time-Dependent Hartree for Bosons (MCTDHB) method and running the MCTDHB and MCTDH-X software packages on the Cray XC40 system Hazel Hen. The results we disseminate within this report comprise: (i) Entropie...
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We present an alternative method for determining the sound velocity in atomic Bose–Einstein condensates, based on thermodynamic global variables. The total number of trapped atoms was as a function of temperature carefully studied across the phase transition, at constant volume. It allowed us to evaluate the sound velocity resulting in consistent values from the quantum to classical regime, in good agreement with previous results found in literature. We also provide some insight about the domina...
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#1F. J. VivancoH-Index: 2
#2A. R. FritschH-Index: 4
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#2A. R. FritschH-Index: 4
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#1P. E. S. TavaresH-Index: 6
#2A. R. FritschH-Index: 4
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#1P. E. S. Tavares (USP: University of São Paulo)H-Index: 6
#2A. R. Fritsch (USP: University of São Paulo)H-Index: 4
Last. Vanderlei Salvador Bagnato (USP: University of São Paulo)H-Index: 64
view all 7 authors...
Abstract We report the results of the direct comparison of a freely expanding turbulent Bose–Einstein condensate and a propagating optical speckle pattern. We found remarkably similar statistical properties underlying the spatial propagation of both phenomena. The calculated second-order correlation together with the typical correlation length of each system is used to compare and substantiate our observations. We believe that the close analogy existing between an expanding turbulent quantum gas...
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