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Resultats globals: 10 registres trobats en 0.01 segons.
Articles, 10 registres trobats
Articles 10 registres trobats  
1.
13 p, 1.7 MB Blue-detuned optical ring trap for Bose-Einstein condensates based on conical refraction / Turpin Avilés, Alejandro (Universitat Autònoma de Barcelona. Departament de Física) ; Polo Gomez, Juan (Universitat Autònoma de Barcelona. Departament de Física) ; Loiko, Yu V. (Aston Institute of Photonic Technologies) ; Küber, Johannes (Technische Universität Darmstadt. Institut für Angewandte Physik) ; Schmaltz, F. (Technische Universität Darmstadt. Institut für Angewandte Physik) ; Kalkandjiev, Todor Kirilov (Universitat Autònoma de Barcelona. Departament de Física) ; Ahufinger, Verònica (Universitat Autònoma de Barcelona. Departament de Física) ; Birkl, Gerhard (Technische Universität Darmstadt. Institut für Angewandte Physik) ; Mompart Penina, Jordi (Universitat Autònoma de Barcelona. Departament de Física)
We present a novel approach for the optical manipulation of neutral atoms in annular light structures produced by the phenomenon of conical refraction occurring in biaxial optical crystals. For a beam focused to a plane behind the crystal, the focal plane exhibits two concentric bright rings enclosing a ring of null intensity called the Poggendorff ring. [...]
2015 - 10.1364/OE.23.001638
Optics express, Vol. 23, issue 2 (Jan. 2015) , p. 1638-1650  
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2.
11 p, 385.0 KB Quantum computing in optical microtraps based on the motional states of neutral atoms / Eckert, Kai (University of Hannover. Institute of Theoretical Physics) ; Mompart Penina, Jordi (Universitat Autònoma de Barcelona. Departament de Física) ; Yi, X. X. (University of Hannover. Institute of Theoretical Physics) ; Schliemann, J. (University of Basel. Department of Physics and Astronomy) ; Bruß, Dagmar (University of Hannover. Institute of Theoretical Physics) ; Birkl, Gerhard (University of Hannover. Institute of Quantum Optics) ; Lewenstein, Maciej (University of Hannover. Institute of Theoretical Physics) ; American Physical Society
We investigate quantum computation with neutral atoms in optical microtraps where the qubit is implemented in the motional states of the atoms, i. e. , in the two lowest vibrational states of each trap. [...]
2002 - 10.1103/PhysRevA.66.042317
Physical review. A, Vol. 66, Issue 4 (October 2002) , p. 042317-1-042317-11  
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3.
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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4.
9 p, 817.9 KB One- and two-dimensional quantum walks in arrays of optical traps / Eckert, Kai (University of Hannover. Institute of Theoretical Physics) ; Mompart Penina, Jordi (Universitat Autònoma de Barcelona. Departament de Física) ; Birkl, Gerhard (Universität Darmstadt. Institut für Angewandte Physik, Technische) ; Lewenstein, Maciej (University of Hannover. Institute of Theoretical Physics) ; American Physical Society
We propose a different implementation of discrete-time quantum walks for a neutral atom in an array of optical microtraps or an optical lattice. We analyze a one-dimensional walk in position space, with the coin, the additional qubit degree of freedom that controls the displacement of the quantum walker, implemented as a spatially delocalized qubit, i. [...]
2005 - 10.1103/PhysRevA.72.012327
Physical review. A, Vol. 72, Issue 1 (July 2005) , p. 012327-1-012327-9  
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5.
6 p, 683.9 KB Coherent patterning of matter waves with subwavelength localization / Mompart Penina, Jordi (Universitat Autònoma de Barcelona. Departament de Física) ; Ahufinger, Verònica (Universitat Autònoma de Barcelona. Departament de Física) ; Birkl, Gerhard (Universität Darmstadt. Institut für Angewandte Physik, Technische) ; American Physical Society
We propose the subwavelength localization via adiabatic passage (SLAP) technique to coherently achieve state-selective patterning of matter waves well beyond the diffraction limit. The SLAP technique consists in coupling two partially overlapping and spatially structured laser fields to three internal levels of the matter wave yielding state-selective localization at those positions where the adiabatic passage process does not occur. [...]
2009 - 10.1103/PhysRevA.79.053638
Physical review. A, Vol. 79, Issue 5 (May 2009) , p. 053638-1-053638-6  
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6.
8 p, 252.8 KB Manipulating mesoscopic multipartite entanglement with atom-light interfaces / Stasinska, Julia (Universitat Autònoma de Barcelona. Departament de Física) ; Rodó Sarró, Carles (Universitat Autònoma de Barcelona. Departament de Física) ; Paganelli, Simone (Universitat Autònoma de Barcelona. Departament de Física) ; Birkl, Gerhard (Universität Darmstadt. Institut für Angewandte Physik, Technische) ; Sanpera Trigueros, Anna (Universitat Autònoma de Barcelona. Departament de Física) ; American Physical Society
Entanglement between two macroscopic atomic ensembles induced by measurement on an ancillary light system has proven to be a powerful method for engineering quantum memories and quantum state transfer. [...]
2009 - 10.1103/PhysRevA.80.062304
Physical review. A, Vol. 80, Issue 6 (December 2009) , p. 062304-1-062304-8  
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7.
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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8.
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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9.
7 p, 396.1 KB Single-site addressing of ultracold atoms beyond the diffraction limit via position-dependent adiabatic passage / Viscor, Daniel (Universitat Autònoma de Barcelona. Departament de Física) ; Rubio López, Juan Luis (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) ; Ahufinger, Verònica (Universitat Autònoma de Barcelona. Departament de Física) ; American Physical Society
We propose a single-site addressing implementation based on the subwavelength localization via adiabatic passage (SLAP) technique. We consider a sample of ultracold neutral atoms loaded into a two-dimensional optical lattice with one atom per site. [...]
2012 - 10.1103/PhysRevA.86.063409
Physical review. A, Vol. 86, Issue 6 (December 2012) , p. 063409-1-063409-7  
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10.
4 p, 200.7 KB Quantum computing with spatially delocalized qubits / Mompart Penina, Jordi (Universitat Autònoma de Barcelona. Departament de Física) ; Eckert, Kai (University of Hannover. Institute of Theoretical Physics) ; Ertmer, W. (University of Hannover. Institute of Quantum Optics) ; Birkl, Gerhard (University of Hannover. Institute of Quantum Optics) ; Lewenstein, Maciej (University of Hannover. Institute of Theoretical Physics) ; American Physical Society
We analyze the operation of quantum gates for neutral atoms with qubits that are delocalized in space, i. e. , the computational basis states are defined by the presence of a neutral atom in the ground state of one out of two trapping potentials. [...]
2003 - 10.1103/PhysRevLett.90.147901
Physical review letters, Vol. 90, Issue 14 (April 2003) , p. 147901  
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