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Depósito Digital de Documentos de la UAB Encontrados 86 registros  anterior11 - 20siguientefinal  ir al registro: La búsqueda tardó 0.01 segundos. 
11.
4 p, 70.8 KB Experimental observation of parametric effects near period doubling in a loss-modulated CO2 laser / Chizhevsky, V. N. (National Academy of Sciences of Belarus. B.I. Stepanov Institute of Physics) ; Corbalán, R. (Ramón) (Universitat Autònoma de Barcelona. Departament de Física) ; American Physical Society
A number of parametric effects, such as suppression of period doubling, shift of the bifurcation point, scaling law relating the shift and the perturbation amplitude, influence of the detuning on the suppression, reaching of the maximum gain between the original and shifted bifurcation points, and scaling law for idler power are experimentally observed near period doubling bifurcation in a loss-driven CO2 laser that is subjected to periodic loss perturbations at a frequency that is close to a parametric resonance of the unperturbed system.
1996 - 10.1103/PhysRevA.53.1830
Physical review. A, Num. 53, Issue 3 (March 1996) , p. 1830-1833  
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12.
11 p, 215.2 KB Implications of the noncrossing property of Bohm trajectories in one-dimensional tunneling configurations / Oriols, Xavier (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica) ; Suñé, Jordi, 1963- (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica) ; Martín, Ferran, (Martín Antolín) (Universitat Autònoma de Barcelona. Departament d'Enginyeria Electrònica) ; American Physical Society
Several practical implications of the noncrossing property of one-dimensional Bohm trajectories are examined. It is shown that the position of a Bohm particle, the average transmission, reflection and dwell times, and the probability distribution of these tunneling times, can all be obtained without actually calculating trajectories. [...]
1996 - 10.1103/PhysRevA.54.2594
Physical review. A, Vol. 54, Issue 4 (October 1996) , p. 2594-2604  
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13.
11 p, 237.0 KB Scaling laws in velocity-selective coherent-population-trapping laser cooling / Morigi, Giovanna (Università di Pisa. Dipartimento di Fisica) ; Zambon, B. (Università di Pisa. Dipartimento di Fisica) ; Leinfellner, N. (Università di Pisa. Dipartimento di Fisica) ; Arimondo, Ennio (University of Colorado) ; American Physical Society
One-dimensional laser cooling based on velocity-selective coherent population trapping (VSCPT) has been investigated numerically through the solution of the optical Bloch equations and through a Monte Carlo analysis. [...]
1996 - 10.1103/PhysRevA.53.2616
Physical review. A, Vol. 53, Issue 4 (April 1996) , p. 2616-2626  
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14.
5 p, 131.0 KB Competition and bistability of longitudinal modes in a Raman laser / Corbalán, R. (Ramón) (Universitat Autònoma de Barcelona. Departament de Física) ; Cortit Subirà, Jordi (Università degli studi di Milano) ; Prati, F. (Università degli studi di Milano) ; American Physical Society
A model for Raman lasers including several longitudinal modes is analyzed. Depending on the choice of the parameters the system can exhibit single-mode emission, wide bistability domains, and self-pulsing. [...]
1996 - 10.1103/PhysRevA.53.481
Physical review. A, Vol. 53, Issue 1 (January 1996) , p. 481-485  
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15.
6 p, 120.7 KB Scattering of second-harmonic light from small spherical particles ordered in a crystalline lattice / Martorell, Jordi (Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear) ; Corbalán, R. (Ramón) (Universitat Autònoma de Barcelona. Departament de Física) ; Vilaseca, Ramon (Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear) ; American Physical Society
Experimental evidence of scattering of second-harmonic light from the surface of spherical particles of optical dimensions is presented. This mechanism for second-harmonic generation is observed in a suspension of monodisperse spherical colloidal particles, ordered in a centrosymmetric crystalline lattice. [...]
1997 - 10.1103/PhysRevA.55.4520
Physical review. A, Vol. 55, Issue 6 (June 1997) , p. 4520-4525  
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16.
4 p, 121.5 KB Scaling laws in velocity-selective coherent population trapping in the presence of polarization-gradient cooling / Menotti, C. (Università di Pisa. Dipartimento di Fisica) ; Morigi, Giovanna (Università di Pisa. Dipartimento di Fisica) ; Müller, J. H. (Università di Pisa. Dipartimento di Fisica) ; Arimondo, Ennio (Università di Pisa. Dipartimento di Fisica) ; American Physical Society
One-dimensional laser cooling based on velocity-selective coherent population trapping (VSCPT) on a 2g→1e transition has been investigated numerically through the solution of the optical Bloch equations. [...]
1997 - 10.1103/PhysRevA.56.4327
Physical review. A, Vol. 56, Issue 5 (November 1997) , p. 4327-4330  
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17.
6 p, 132.6 KB Lasing without inversion in three-level systems : self-pulsing in the cascade schemes / Mompart Penina, Jordi (Universitat Autònoma de Barcelona. Departament de Física) ; Peters, C. (Universitat Autònoma de Barcelona. Departament de Física) ; Corbalán, R. (Ramón) (Universitat Autònoma de Barcelona. Departament de Física) ; American Physical Society
Lasing without inversion (LWI) in specific models of closed three-level systems is analyzed in terms of nonlinear dynamics. From a linear stability analysis of the trivial nonlasing solution of the homogeneously broadened systems with on-resonance driving and laser fields, we find that, near lasing threshold, resonant closed Λ and V schemes yield continuous-wave LWI while resonant cascade schemes can give rise to self-pulsing LWI. [...]
1998 - 10.1103/PhysRevA.57.2163
Physical review. A, Vol. 57, Issue 3 (March 1998) , p. 2163-2168  
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18.
6 p, 133.7 KB Laser cooling of trapped atoms to the ground state : a dark state in position space / Morigi, Giovanna (Universität Innsbruck. Institut für Theoretische Physik) ; Cirac Sasturáin, Juan Ignacio, 1965- (Universität Innsbruck. Institut für Theoretische Physik) ; Ellinger, K. (Universität Innsbruck. Institut für Theoretische Physik) ; Zoller, P. (Universität Innsbruck. Institut für Theoretische Physik) ; American Physical Society
We propose a scheme that allows us to laser cool trapped atoms to the ground state of a one-dimensional confining potential. The scheme is based on the creation of a dark state by designing the laser profile, so that the hottest atoms are coherently pumped to another internal level, and then repumped back. [...]
1998 - 10.1103/PhysRevA.57.2909
Physical review. A, Vol. 57, Issue 4 (April 1998) , p. 2909-2914  
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19.
12 p, 502.6 KB Laser cooling of two trapped ions : sideband cooling beyond the Lamb-Dicke limit / Morigi, Giovanna (Universität Innsbruck. Institut für Theoretische Physik) ; Eschner, Jürgen (Universität Innsbruck. Institut für Experimentalphysik) ; Cirac Sasturáin, Juan Ignacio, 1965- (Universität Innsbruck. Institut für Theoretische Physik) ; Zoller, P. (Universität Innsbruck. Institut für Theoretische Physik) ; American Physical Society
We study laser cooling of two ions that are trapped in a harmonic potential and interact by Coulomb repulsion. Sideband cooling in the Lamb-Dicke regime is shown to work analogously to sideband cooling of a single ion. [...]
1999 - 10.1103/PhysRevA.59.3797
Physical review. A, Vol. 59, Issue 5 (May 1999) , p. 3797-3808  
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20.
9 p, 119.5 KB Temperature variation of ultraslow light in a cold gas / Morigi, Giovanna (Max Planck Institut für Quantenoptik) ; Agarwal, G. S. (Physical Research Laboratory (Ahmedabad, Índia)) ; American Physical Society
A model is developed to explain the temperature dependence of the group velocity as observed in the experiments of Hau et al. [Nature (London) 397, 594 (1999)]. The group velocity is quite sensitive to the change in the spatial density. [...]
2000 - 10.1103/PhysRevA.62.013801
Physical review. A, Vol. 62, Issue 1 (June 2000) , p. 013801-1-013801-9  
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Depósito Digital de Documentos de la UAB : Encontrados 86 registros   anterior11 - 20siguientefinal  ir al registro:
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