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Articles 23 registres trobats  anterior11 - 20següent  anar al registre: La cerca s'ha fet en 0.00 segons. 
11.
3 p, 124.5 KB Spin-induced angular momentum switching / Fernández Calvo, Gabriel (Universitat Autònoma de Barcelona. Departament de Física) ; Picón Álvarez, Antonio (Universitat Autònoma de Barcelona. Departament de Física)
When light is transmitted through optically inhomogeneous and anisotropic media the spatial distribution of light can be modified according to its input polarization state. A complete analysis of this process, based on the paraxial approximation, is presented, and we show how it can be exploited to produce a spin-controlled change in the orbital angular momentum of light beams propagating in patterned space-variant optical axis phase plates. [...]
2007 - 10.1364/OL.32.000838
Optics letters, Vol. 32, No. 7 (1 April 2007) , p. 838-840  
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12.
22 p, 469.7 KB La ruptura de matrimonios entre españoles y extranjeros con menores. Una estadística comparada / Domínguez Álvarez, Juan Antonio (Consejo Superior de Investigaciones Científicas (Espanya). Instituto de Estudios Sociales Avanzados)
En España, los matrimonios, los nacimientos y las disoluciones matrimoniales en el seno de hogares binacionales se han incrementado notablemente en los últimos años y, con ello, su relevancia social. [...]
In Spain, marriages, births and the dissolution of marriages in binational households have increased notably in recent years, as well as the social impact of this phenomenon. The aim of this paper is to explore the specific characteristics of marital ruptures between Spanish and non-Spanish spouses and compare them to ruptures between Spanish-only couples. [...]
2014 - 10.5565/rev/papers.593
Papers : revista de sociologia, Vol. 99, Núm. 2 (Abril-Juny 2014) , p. 213-234  
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13.
10 p, 167.8 KB Quantum field theory of photons with orbital angular momentum / Fernández Calvo, Gabriel (Universitat Autònoma de Barcelona. Departament de Física) ; Picón Álvarez, Antonio (Universitat Autònoma de Barcelona. Departament de Física) ; Bagán Capella, Emili (Universitat Autònoma de Barcelona. Departament de Física) ; American Physical Society
A quantum-field-theory approach is put forward to generalize the concept of classical spatial light beams carrying orbital angular momentum to the single-photon level. This quantization framework is carried out both in the paraxial and nonparaxial regimes. [...]
2006 - 10.1103/PhysRevA.73.013805
Physical review. A, Vol. 73, Issue 1 (January 2006) , p. 013805-1-013805-10  
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14.
8 p, 313.2 KB Measuring two-photon orbital angular momentum entanglement / Fernández Calvo, Gabriel (Universitat Autònoma de Barcelona. Departament de Física) ; Picón Álvarez, Antonio (Universitat Autònoma de Barcelona. Departament de Física) ; Bramon Planas, Albert (Universitat Autònoma de Barcelona. Departament de Física) ; American Physical Society
We put forward an approach to estimate the amount of bipartite spatial entanglement of down-converted photon states correlated in orbital angular momentum and the magnitude of the transverse (radial) wave vectors. [...]
2007 - 10.1103/PhysRevA.75.012319
Physical review. A, Vol. 75, Issue 1 (January 2007) , p. 012319-1-012319-8  
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15.
7 p, 1.5 MB Manipulation of single-photon states encoded in transverse spatial modes : possible and impossible tasks / Fernández Calvo, Gabriel (Universitat Autònoma de Barcelona. Departament de Física) ; Picón Álvarez, Antonio (Universitat Autònoma de Barcelona. Departament de Física) ; American Physical Society
Controlled generation and manipulation of photon states encoded in their spatial degrees of freedom is a crucial ingredient in many quantum-information tasks exploiting higher-than-two dimensional encoding. [...]
2008 - 10.1103/PhysRevA.77.012302
Physical review. A, Vol. 77, Issue 1 (January 2008) , p. 012302-1-012302-7  
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16.
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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17.
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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18.
9 p, 468.6 KB Two-center interferences in photoionization of a dissociating H2+ molecule / Picón Álvarez, Antonio (University of Colorado at Boulder. Department of Physics) ; Bahabad, A. (University of Colorado at Boulder. Department of Physics) ; Kapteyn, H. C. (University of Colorado at Boulder. Department of Physics) ; Murnane, M. M. (University of Colorado at Boulder. Department of Physics) ; Becker, A. (University of Colorado at Boulder. Department of Physics) ; American Physical Society
We analyze two-center interference effects in the yields of ionization of a dissociating hydrogen molecular ion by an ultrashort vuv laser pulse. To this end, we performed numerical simulations of the time-dependent Schrödinger equation for a H2+ model ion interacting with two time-delayed laser pulses. [...]
2011 - 10.1103/PhysRevA.83.013414
Physical review. A, Vol. 83, Issue 1 (January 2011) , p. 013414-1-013414-9  
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19.
6 p, 586.0 KB Coherent control of vibrational state population in a nonpolar molecule / Picón Álvarez, Antonio (University of Colorado at Boulder. Department of Physics) ; Biegert, J. (Institut de Ciències Fotòniques) ; Jaron-Becker, A. (University of Colorado at Boulder. Department of Physics) ; Becker, A. (University of Colorado at Boulder. Department of Physics) ; American Physical Society
A coherent control scheme for the population distribution in the vibrational states of nonpolar molecules is proposed. Our theoretical analysis and results of numerical simulations for the interaction of the hydrogen molecular ion in its electronic ground state with an infrared laser pulse reveal a selective two-photon transition between the vibrational states via a coupling with the first excited dissociative state. [...]
2011 - 10.1103/PhysRevA.83.023412
Physical review. A, Vol. 83, Issue 2 (February 2011) , p. 023412-1-023412-6  
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20.
4 p, 1.3 MB Measuring the complete transverse spatial mode spectrum of a wave field / Fernández Calvo, Gabriel (Instituto de Matemàtica Aplicada en Ciencia e Ingeniería (Ciudad Real)) ; Picón Álvarez, Antonio (Universitat Autònoma de Barcelona. Departament de Física) ; Zambrini, Roberta (Institute for Cross-Disciplinary Physics and Complex Systems (Palma de Mallorca)) ; American Physical Society
We put forward a method that allows the experimental determination of the entire spatial mode spectrum of any arbitrary monochromatic wave field in a plane normal to its propagation direction. For coherent optical fields, our spatial spectrum analyzer can be implemented with a small number of benchmark refractive elements embedded in a single Mach-Zehnder interferometer. [...]
2008 - 10.1103/PhysRevLett.100.173902
Physical review letters, Vol. 100, Issue 17 (April 2008) , p. 173902  
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Articles : 23 registres trobats   anterior11 - 20següent  anar al registre:
Vegeu també: autors amb noms similars
4 Alvarez, A.
4 Alvarez, A.
3 Alvarez, A.M.
6 Alvarez, Aida
1 Alvarez, Airam
3 Alvarez, Alejandra
2 Alvarez, Ana Candelaria
1 Alvarez, António M.
2 Alvarez, Aureli
1 Alvárez, Anibal
6 Àlvarez, Aida
4 Álvarez, A.
6 Álvarez, Aida
1 Álvarez, Alba
1 Álvarez, Alejandro
8 Álvarez, Amador
1 Álvarez, Ana M.
1 Álvarez, Antonio
1 Álvarez, Arianna
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