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Resultats globals: 33 registres trobats en 0.03 segons.
Articles, 30 registres trobats
Documents de recerca, 1 registres trobats
Materials acadèmics, 2 registres trobats
Articles 30 registres trobats  1 - 10següentfinal  anar al registre:
1.
13 p, 194.7 KB Dynamics of an ion chain in a harmonic potential / Morigi, Giovanna (University of Ulm. Department of Quantum Physics) ; Fishman, Shmuel (Technion. Department of Physics (Haifa, Israel))
Cold ions in anisotropic harmonic potentials can form ion chains of various sizes. Here, the density of ions is not uniform, and thus the eigenmodes are not phononic-like waves. We study chains of N 1 ions and evaluate analytically the long-wavelength modes and the density of states in the short-wavelength limit. [...]
2004 - 10.1103/PhysRevE.70.066141
Physical review. E : Statistical, nonlinear, and soft matter physics, Vol. 70, Number 6 (December 2004) , p. 066141/1-066141/13  
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2.
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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3.
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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4.
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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5.
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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6.
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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7.
16 p, 296.6 KB Doppler cooling of a Coulomb crystal / Morigi, Giovanna (Max-Planck-Institut für Quantenoptik) ; Eschner, Jürgen (University of Innsbruck. Institut für Experimentalphysik) ; American Physical Society
We study theoretically Doppler laser cooling of a cluster of two-level atoms confined in a linear ion trap. Using several consecutive steps of averaging we derive, from the full quantum-mechanical master equation, an equation for the total mechanical energy of a one-dimensional crystal, defined on a coarse-grained energy scale whose grid size is smaller than the linewidth of the electronic transition. [...]
2001 - 10.1103/PhysRevA.64.063407
Physical review. A, Vol. 64, Issue 6 (November 2001) , p. 063407-1-063407-16  
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8.
4 p, 60.9 KB Measuring irreversible dynamics of a quantum harmonic oscillator / Morigi, Giovanna (Max-Planck-Institut für Quantenoptik) ; Solano, Enrique (Max-Planck-Institut für Quantenoptik) ; Englert, Berthold-Georg (Max-Planck-Institut für Quantenoptik) ; Walther, Herbert (Max-Planck-Institut für Quantenoptik) ; American Physical Society
We show that the unitary evolution of a harmonic oscillator coupled to a two-level system can be undone by a suitable manipulation of the two-level system-more specifically, by a quasi-instantaneous phase change. [...]
2002 - 10.1103/PhysRevA.65.040102
Physical review. A, Vol. 65, Issue 4 (April 2002) , p. 040102-1-040102-4  
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9.
9 p, 130.8 KB Phase-dependent interaction in a four-level atomic configuration / Morigi, Giovanna (Max-Planck-Institut für Quantenoptik) ; Franke-Arnold, Sonja (University of Strathclyde. Department of Physics) ; Oppo, Gian-Luca (University of Strathclyde. Department of Physics) ; American Physical Society
We study a four-level atomic scheme interacting with four lasers in a closed-loop configuration with a ⋄ (diamond) geometry. We investigate the influence of the laser phases on the steady state. We show that, depending on the phases and the decay characteristic, the system can exhibit a variety of behaviors, including population inversion and complete depletion of an atomic state. [...]
2002 - 10.1103/PhysRevA.66.053409
Physical review. A, Vol. 66, Issue 5 (November 2002) , p. 053409-1-053409-9  
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10.
9 p, 106.9 KB Cooling atomic motion with quantum interference / Morigi, Giovanna (Universität Ulm. Abteilung Quantenphysik) ; American Physical Society
We theoretically investigate the quantum dynamics of the center of mass of trapped atoms, whose internal degrees of freedom are driven in a Λ-shaped configuration with the lasers tuned at two-photon resonance. [...]
2003 - 10.1103/PhysRevA.67.033402
Physical review. A, Vol. 67, Issue 3 (March 2003) , p. 033402-1-033402-9  
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Articles : 30 registres trobats   1 - 10següentfinal  anar al registre:
Documents de recerca 1 registres trobats  
1.
151 p, 1.5 MB Cavity Quantum Electrodynamics with Ultracold Atoms / Habibian, Hessam ; Morigi, Giovanna, dir. (Universität des Saarlandes) ; Corbalán, R., , dir. (Universitat Autònoma de Barcelona. Departament de Física) ; Universitat Autònoma de Barcelona. Departament de Física
Die vorliegende Arbeit befasst sich mit der Wechselwirkung ultrakalter Atome mit der Mode eines optischen Resonators hoher Güte. Die Atome sind dabei in einem periodischen Potenzial gefangen, dessen Periodizität nicht kommensurabel mit der Wellenlänge des Resonators ist. [...]
In this thesis we investigate the interactions between ultracold atoms confined by a periodic potential and a mode of a high-finesse optical cavity whose wavelength is incommensurate with the potential periodicity. [...]
[Barcelona] : Universitat Autònoma de Barcelona, 2013  
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Materials acadèmics 2 registres trobats  
1.
2 p, 2.3 MB Interacció llum-materia [26121] / Morigi, Giovanna ; Universitat Autònoma de Barcelona. Facultat de Ciències
2006-07
Llicenciat en Física [535]  
Registre complet - Creative Commons
2.
2 p, 26.6 KB Interacció llum-materia [26121] / Morigi, Giovanna ; Universitat Autònoma de Barcelona. Facultat de Ciències
2005-06
Llicenciat en Física [535]  
Registre complet - Creative Commons

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