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Artículos Encontrados 30 registros  inicioanterior21 - 30  ir al registro: La búsqueda tardó 0.01 segundos. 
21.
10 p, 336.2 KB Resonance fluorescence of a cold atom in a high-finesse resonator / Bienert, Marc (Universidad Nacional Autónoma de México. Instituto de Ciencias Físicas) ; Torres, Mauricio (Universidad Nacional Autónoma de México. Instituto de Ciencias Físicas) ; Zippilli, Stefano (Universitat Autònoma de Barcelona. Departament de Física) ; Morigi, Giovanna (Universitat Autònoma de Barcelona. Departament de Física) ; American Physical Society
We study the spectra of emission of a system composed by an atom, tightly confined inside a high-finesse resonator, when the atom is driven by a laser and is at steady state of the cooling dynamics induced by laser and cavity fields. [...]
2007 - 10.1103/PhysRevA.76.013410
Physical review. A, Vol. 76, Issue 1 (July 2007) , p. 013410-1-013410-10  
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22.
4 p, 283.8 KB Generation of Einstein-Podolsky-Rosen-entangled radiation through an atomic reservoir / Pielawa, Susanne (Universitat Autònoma de Barcelona. Departament de Física) ; Morigi, Giovanna (Universitat Autònoma de Barcelona. Departament de Física) ; Vitali, David (Università di Camerino. Dipartimento di Fisica) ; Davidovich, L. (Universidade Federal do Rio de Janeiro. Instituto de Física) ; American Physical Society
We propose a scheme for generating two-mode squeezing in high-Q resonators using a beam of atoms with random arrival times, which acts as a reservoir for the field. The scheme is based on four-wave mixing processes leading to emission into two cavity modes, which are resonant with the Rabi sidebands of the atomic dipole transition, driven by a saturating classical field. [...]
2007 - 10.1103/PhysRevLett.98.240401
Physical review letters, Vol. 98, Issue 24 (June 2007) , p. 240401-1-24040-4  
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23.
10 p, 323.6 KB Non linear optics with two trapped atoms / Fernández-Vidal, Sònia, 1978- (Universitat Autònoma de Barcelona. Departament de Física) ; Zippilli, Stefano (Universitat Autònoma de Barcelona. Departament de Física) ; Morigi, Giovanna (Universitat Autònoma de Barcelona. Departament de Física) ; American Physical Society
We show theoretically that two atomic dipoles in a resonator constitute a nonlinear medium, whose properties can be controlled through the relative position of the atoms inside the cavity and the detuning and intensity of the driving laser. [...]
2007 - 10.1103/PhysRevA.76.053829
Physical review. A, Vol. 76, Issue 5 (November 2007) , p. 053829-1-053829-10  
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24.
4 p, 107.2 KB Ground state laser cooling using electromagnetically induced transparency / Morigi, Giovanna (Max-Planck Institut für Quantenoptik) ; Eschner, Jürgen (University of Innsbruck. Institut für Experimentalphysik) ; Keitel, Christoph H. (University of Freiburg. Theoretische Quantendynamik) ; American Physical Society
A laser cooling method for trapped atoms is described which achieves ground state cooling by exploiting quantum interference in a driven Λ-shaped arrangement of atomic levels. The scheme is technically simpler than existing methods of sideband cooling, yet it can be significantly more efficient, in particular when several motional modes are involved, and it does not impose restrictions on the transition linewidth. [...]
2000 - 10.1103/PhysRevLett.85.4458
Physical review letters, Vol. 85, Issue 21 (November 2000) , p. 4458-4461  
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25.
4 p, 562.1 KB Suppression of Bragg scattering by collective interference of spatially ordered atoms with a high-Q cavity mode / Zippilli, Stefano (Universität Ulm. Abteilung für Quantenphysik) ; Morigi, Giovanna (Universität Ulm. Abteilung für Quantenphysik) ; Ritsch, Helmut (Universität Innsbruck. Institut für Theoretische Physik) ; American Physical Society
When N driven atoms emit in phase into a high-Q cavity mode, the intracavity field generated by collective scattering interferes destructively with the pump driving the atoms. Hence atomic fluorescence is suppressed and cavity loss becomes the dominant decay channel for the whole ensemble. [...]
2004 - 10.1103/PhysRevLett.93.123002
Physical review letters, Vol. 93, Issue 12 (September 2004) , p. 123002  
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26.
4 p, 256.4 KB Eigenmodes and thermodynamics of a Coulomb chain in a harmonic potential / Morigi, Giovanna (University of Ulm. Department of Quantum Physics) ; Fishman, Shmuel (Technion. Department of Physics (Haifa, Israel)) ; American Physical Society
The density of ions trapped in a harmonic potential in one dimension is not uniform. Consequently the eigenmodes are not phononlike waves. We calculate the long-wavelength modes in the continuum limit, and evaluate the density of states in the short-wavelength limit for chains of N≫1 ions. [...]
2004 - 10.1103/PhysRevLett.93.170602
Physical review letters, Vol. 93, Issue 17 (October 2004) , p. 170602  
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27.
4 p, 909.0 KB Cooling trapped atoms in optical resonators / Zippilli, Stefano (Universität Ulm. Abteilung für Quantenphysik) ; Morigi, Giovanna (Universitat Autònoma de Barcelona. Departament de Física) ; American Physical Society
We derive an equation for the cooling dynamics of the quantum motion of an atom trapped by an external potential inside an optical resonator. This equation has broad validity and allows us to identify novel regimes where the motion can be efficiently cooled to the potential ground state. [...]
2005 - 10.1103/PhysRevLett.95.143001
Physical review letters, Vol. 95, Issue 14 (September 2005) , p. 143001  
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28.
4 p, 183.2 KB Entangled light pulses from single cold atoms / Morigi, Giovanna (Universitat Autònoma de Barcelona. Departament de Física) ; Eschner, Jürgen (Institut de Ciències Fotòniques) ; Mancini, Stefano (Università di Camerino. Dipartimento di Fisica) ; Vitali, David (Università di Camerino. Dipartimento di Fisica) ; American Physical Society
The coherent interaction between a laser-driven single trapped atom and an optical high-finesse resonator allows one to produce entangled multiphoton light pulses on demand. The mechanism is based on the mechanical effect of light. [...]
2006 - 10.1103/PhysRevLett.96.023601
Physical review letters, Vol. 96, Issue 2 (January 2006) , p. 23601  
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29.
4 p, 202.8 KB Cavity cooling of internal molecular motion / Morigi, Giovanna (Universitat Autònoma de Barcelona. Departament de Física) ; Pinkse, Pepijn W. H. (Max-Planck-Institut für Quantenoptik) ; Kowalewski, Markus (Ludwig-Maximilians-Universität München) ; de Vivie-Riedle, Regina (Ludwig-Maximilians-Universität München) ; American Physical Society
We predict that it is possible to cool rotational, vibrational, and translational degrees of freedom of molecules by coupling a molecular dipole transition to an optical cavity. The dynamics is numerically simulated for a realistic set of experimental parameters using OH molecules. [...]
2007 - 10.1103/PhysRevLett.99.073001
Physical review letters, Vol. 99, Issue 7 (August 2007) , p. 73001  
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30.
4 p, 233.5 KB Mott insulator states of ultracold atoms in optical resonators / Larson, Jonas (Institut de Ciències Fotòniques) ; Damski, Bogdan (Los Alamos National Laboratory) ; Morigi, Giovanna (Universitat Autònoma de Barcelona. Departament de Física) ; Lewenstein, Maciej (Institució Catalana de Recerca i Estudis Avançats) ; American Physical Society
We study the low temperature physics of an ultracold atomic gas in the potential formed inside a pumped optical resonator. Here, the height of the cavity potential, and hence the quantum state of the gas, depends not only on the pump parameters, but also on the atomic density through a dynamical ac-Stark shift of the cavity resonance. [...]
2008 - 10.1103/PhysRevLett.100.050401
Physical review letters, Vol. 100, Issue 5 (February 2008) , p. 50401  
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Artículos : Encontrados 30 registros   inicioanterior21 - 30  ir al registro:
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