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Articles 28 records found  beginprevious19 - 28  jump to record: Search took 0.00 seconds. 
19.
5 p, 435.2 KB Three-level atom optics via the tunneling interaction / Eckert, Kai (University of Hannover. Institute of Theoretical Physics) ; Lewenstein, Maciej (University of Hannover. Institute of Theoretical Physics) ; Corbalán, R. (Ramón) (Universitat Autònoma de Barcelona. Departament de Física) ; Birkl, Gerhard (University of Hannover. Institute of Quantum Optics) ; Ertmer, W. (University of Hannover. Institute of Quantum Optics) ; Mompart Penina, Jordi (Universitat Autònoma de Barcelona. Departament de Física) ; American Physical Society
Three-level atom optics is introduced as a simple, efficient, and robust method to coherently manipulate and transport neutral atoms. The tunneling interaction among three trapped states allows us to realize the spatial analog of the stimulated Raman adiabatic passage, coherent population trapping, and electromagnetically induced transparency techniques and offers a wide range of possible applications. [...]
2004 - 10.1103/PhysRevA.70.023606
Physical review. A, Vol. 70, Issue 2 (August 2004) , p. 023606-1-023606-5  
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20.
4 p, 544.2 KB Deterministic cavity-QED source of polarization-entangled photon pairs / García Maraver, Rocío (Universitat Autònoma de Barcelona. Departament de Física) ; Eckert, Kai (Universitat Autònoma de Barcelona. Departament de Física) ; Corbalán, R. (Ramón) (Universitat Autònoma de Barcelona. Departament de Física) ; Mompart Penina, Jordi (Universitat Autònoma de Barcelona. Departament de Física) ; American Physical Society
We present two cavity quantum electrodynamics proposals that, sharing the same basic elements, allow for the deterministic generation of entangled photon pairs by means of a three-level atom successively coupled to two single longitudinal mode high-Q optical resonators presenting polarization degeneracy. [...]
2006 - 10.1103/PhysRevA.74.031801
Physical review. A, Vol. 74, Issue 3 (September 2006) , p. 031801-1-031801-4  
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21.
9 p, 219.2 KB Ultrashort pulse control of space-dependent excitations in a three-level system / Loiko, Yu. (Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear) ; Serrat, C. (Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear) ; Vilaseca, Ramon (Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear) ; Ahufinger, Verònica (Universitat Autònoma de Barcelona. Departament de Física) ; Mompart Penina, Jordi (Universitat Autònoma de Barcelona. Departament de Física) ; Corbalán, R. (Ramón) (Universitat Autònoma de Barcelona. Departament de Física) ; American Physical Society
Coherent control of regions with spatial excitation of populations and coherence between two lower states in three-level Λ-type quantum systems mediated by the self-induced transparency (SIT) phenomenon is theoretically investigated with one- and two-color ultrashort pulses and with pulse sequences beyond the slowly varying envelope (SVEA) and rotating wave (RWA) approximations. [...]
2007 - 10.1103/PhysRevA.75.023801
Physical review. A, Vol. 75, Issue 2 (February 2007) , p. 023801-1-023801-9  
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22.
8 p, 644.8 KB Atomtronics with holes : coherent transport of an empty site in a triple-well potential : / Benseny, Antoni (Universitat Autònoma de Barcelona. Departament de Física) ; Fernández-Vidal, Sònia, 1978- (Universitat Autònoma de Barcelona. Departament de Física) ; Bagudà, Joan (Universitat Autònoma de Barcelona. Departament de Física) ; Corbalán, R. (Ramón) (Universitat Autònoma de Barcelona. Departament de Física) ; Picón Álvarez, Antonio (Universitat Autònoma de Barcelona. Departament de Física) ; Roso, Luis (Centro de Láseres Pulsados (Salamanca, Castella i Lleó)) ; Birkl, Gerhard (Universität Darmstadt. Institut für Angewandte Physik, Technische) ; Mompart Penina, Jordi (Universitat Autònoma de Barcelona. Departament de Física) ; American Physical Society
We investigate arrays of three traps with two fermionic or bosonic atoms. The tunneling interaction between neighboring sites is used to prepare multisite dark states for the empty site (i. e. , the hole) which allows for the coherent manipulation of its external degrees of freedom. [...]
2010 - 10.1103/PhysRevA.82.013604
Physical review. A, Vol. 82, Issue 1 (July 2010) , p. 013604-1-013604-8  
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23.
7 p, 824.8 KB Dipole spectrum structure of nonresonant nonpertubative driven two-level atoms / Picón Álvarez, Antonio (Universitat Autònoma de Barcelona. Departament de Física) ; Roso, Luis (Centro de Láseres Pulsados (Salamanca, Castella i Lleó)) ; Mompart Penina, Jordi (Universitat Autònoma de Barcelona. Departament de Física) ; Varela, O. (Universidad de Salamanca. Departamento de Física Aplicada) ; Ahufinger, Verònica (Universitat Autònoma de Barcelona. Departament de Física) ; Corbalán, R. (Ramón) (Universitat Autònoma de Barcelona. Departament de Física) ; Plaja, L. (Universidad de Salamanca. Departamento de Física Aplicada) ; American Physical Society
We analyze the dipole spectrum of a two-level atom excited by a nonresonant intense monochromatic field under the electric dipole approximation and beyond the rotating wave approximation. We show that the apparently complex spectral structure can be completely described by two families: harmonic frequencies of the driving field and field-induced nonlinear fluorescence. [...]
2010 - 10.1103/PhysRevA.81.033420
Physical review. A, Vol. 81, Issue 3 (March 2010) , p. 033420-1-033420-7  
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24.
8 p, 806.0 KB Adiabatic splitting, transport, and self-trapping of a Bose-Einstein condensate in a double-well potential / Ottaviani, Carlo (Universitat Autònoma de Barcelona. Departament de Física) ; Ahufinger, Verònica (Universitat Autònoma de Barcelona. Departament de Física) ; Corbalán, R. (Ramón) (Universitat Autònoma de Barcelona. Departament de Física) ; Mompart Penina, Jordi (Universitat Autònoma de Barcelona. Departament de Física) ; American Physical Society
We show that the adiabatic dynamics of a Bose-Einstein condensate (BEC) in a double-well potential can be described in terms of a dark variable resulting from the combination of the population imbalance and the spatial atomic coherence between the two wells. [...]
2010 - 10.1103/PhysRevA.81.043621
Physical review. A, Vol. 81, Issue 4 (April 2010) , p. 043621-1-043621-8  
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25.
7 p, 561.1 KB Filtering of matter-wave vibrational states via spatial adiabatic passage / Loiko, Yury (National Academy of Sciences of Belarus. B.I. Stepanov Institute of Physics) ; Ahufinger, Verònica (Universitat Autònoma de Barcelona. Departament de Física) ; Corbalán, R. (Ramón) (Universitat Autònoma de Barcelona. Departament de Física) ; Birkl, Gerhard (Universität Darmstadt. Institut für Angewandte Physik, Technische) ; Mompart Penina, Jordi (Universitat Autònoma de Barcelona. Departament de Física) ; American Physical Society
We discuss the filtering of the vibrational states of a cold atom in an optical trap by chaining this trap with two empty ones and adiabatically controlling the tunneling. Matter-wave filtering is performed by selectively transferring the population of the highest populated vibrational state to the most distant trap while the population of the rest of the states remains in the initial trap. [...]
2011 - 10.1103/PhysRevA.83.033629
Physical review. A, Vol. 83, Issue 3 (March 2011) , p. 033629-1-033629-7  
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26.
4 p, 219.3 KB Cavity solitons in two-level lasers with dense amplifying medium / Ahufinger, Verònica (Universitat Autònoma de Barcelona. Departament de Física) ; Garcia-Ojalvo, Jordi (Universitat Politècnica de Catalunya. Departament de Física i Enginyeria Nuclear) ; Mompart Penina, Jordi (Universitat Autònoma de Barcelona. Departament de Física) ; Torrent, M. C. (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
Local-field effects are known to induce bistability in dense optical media. We examine theoretically whether this property is preserved in broad-area cavities, and show that bistability between the homogeneous lasing and nonlasing states of the system persists provided a Fourier filtering technique is used to prevent off-axis emission. [...]
2003 - 10.1103/PhysRevLett.91.083901
Physical review letters, Vol. 91, Issue 8 (August 2003) , p. 083901  
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27.
4 p, 94.5 KB Coherent population trapping in two-electron three-level systems with aligned spins / Mompart Penina, Jordi (Universitat Autònoma de Barcelona. Departament de Física) ; Corbalán, R. (Ramón) (Universitat Autònoma de Barcelona. Departament de Física) ; Roso, Luis (Universidad de Salamanca. Departamento de Física Aplicada) ; American Physical Society
The possibility of coherent population trapping in two electron states with aligned spins (orthosystem) is evidenced. From the analysis of a three-level atomic system containing two electrons, and driven by the two laser fields needed for coherent population trapping, a conceptually new kind of dark state appears. [...]
2002 - 10.1103/PhysRevLett.88.020601
Physical review letters, Vol. 88, Issue 2 (December 2001) , p. 023603  
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28.
4 p, 215.3 KB La llum, vista a través de l'electrodinàmica quàntica / Corbalán, R. (Ramón) (Universitat Autònoma de Barcelona. Departament de Física)
El premi Nobel de física del 2005 es va concedir a tres investigadors en el camp de l'òptica quàntica. És sorprenent el que actualment s'arriba a fer amb la llum, treballant en l'àmbit de l'electrodinàmica quàntica.
2006 - 10.5565/rev/ciencies.307
Ciències : revista del professorat de ciències de primària i secundària, N. 4 (2006) p. 41-44  
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Articles : 28 records found   beginprevious19 - 28  jump to record:
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41 Corbalan, R.
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