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11 p, 1.5 MB |
Thermometry precision in strongly correlated ultracold lattice gases
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Mehboudi, Mohammad (Universitat Autònoma de Barcelona. Departament de Física) ;
Moreno Cardoner, María (Queen's University. Centre for Theoretical Atomic, Molecular and Optical Physics) ;
De Chiara, Gabriele (Queen's University. Centre for Theoretical Atomic, Molecular and Optical Physics) ;
Sanpera Trigueros, Anna (Universitat Autònoma de Barcelona. Departament de Física)
The precise knowledge of the temperature of an ultracold lattice gas simulating a strongly correlated system is a question of both fundamental and technological importance. Here, we address such question by combining tools from quantum metrology together with the study of the quantum correlations embedded in the system at finite temperatures. [...]
2015 - 10.1088/1367-2630/17/5/055020
New journal of physics, Vol. 17 (May 2015) , art. 55020
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2.
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25 p, 976.0 KB |
Disordered ultracold atomic gases in optical lattices : a case study of Fermi-Bose mixtures
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Ahufinger, Verònica (Universitat Autònoma de Barcelona. Departament de Física) ;
Sánchez Palencia, L. (University of Hannover. Institute of Theoretical Physics) ;
Kantian, A. (University of Hannover. Institute of Theoretical Physics) ;
Sanpera Trigueros, Anna (Universitat Autònoma de Barcelona. Departament de Física) ;
Lewenstein, Maciej (University of Hannover. Institute of Theoretical Physics) ;
American Physical Society
We present a review of properties of ultracold atomic Fermi-Bose mixtures in inhomogeneous and random optical lattices. In the strong interacting limit and at very low temperatures, fermions form, together with bosons or bosonic holes, composite fermions. [...]
2005 - 10.1103/PhysRevA.72.063616
Physical review. A, Vol. 72, Issue 6 (December 2005) , p. 063616-1-063616-25
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8 p, 236.2 KB |
Quantum-information processing in disordered and complex quantum systems
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Sen, Aditi (Institut de Ciències Fotòniques) ;
Sen, Ujjval (Institut de Ciències Fotòniques) ;
Ahufinger, Verònica (Universitat Autònoma de Barcelona. Departament de Física) ;
Briegel, Hans J. (Österreichische Akademie der Wissenschaften. Institut für Quantenoptik und Quanteninformation) ;
Sanpera Trigueros, Anna (Universitat Autònoma de Barcelona. Departament de Física) ;
Lewenstein, Maciej (University of Hannover. Institute of Theoretical Physics) ;
American Physical Society
We study quantum information processing in complex disordered many body systems that can be implemented by using lattices of ultracold atomic gases and trapped ions. We demonstrate, first in the short range case, the generation of entanglement and the local realization of quantum gates in a disordered magnetic model describing a quantum spin glass. [...]
2006 - 10.1103/PhysRevA.74.062309
Physical review. A, Vol. 74, Issue 6 (December 2006) , p. 062309-1-062309-8
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8 p, 252.8 KB |
Manipulating mesoscopic multipartite entanglement with atom-light interfaces
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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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4 p, 232.3 KB |
Experimental detection of multipartite entanglement using witness operators
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Bourennane, Mohamed (Max-Planck-Institut für Quantenoptik (Garching, Alemanya)) ;
Eibl, Manfred (Max-Planck-Institut für Quantenoptik (Garching, Alemanya)) ;
Kurtsiefer, Christian (Ludwig-Maximilians-Universität München. Fakultät für Physik) ;
Gaertner, Sascha (Max-Planck-Institut für Quantenoptik (Garching, Alemanya)) ;
Weinfurter, Harald (Max-Planck-Institut für Quantenoptik (Garching, Alemanya)) ;
Gühne, Otfried (Universität Hannover. Institut für Theoretische Physik) ;
Hyllus, Philipp (Universität Hannover. Institut für Theoretische Physik) ;
Bruß, Dagmar (Universität Hannover. Institut für Theoretische Physik) ;
Lewenstein, Maciej (Universität Hannover. Institut für Theoretische Physik) ;
Sanpera Trigueros, Anna (Universität Hannover. Institut für Theoretische Physik) ;
American Physical Society
We present the experimental detection of genuine multipartite entanglement using entanglement witness operators. To this aim, we introduce a canonical way of constructing and decomposing witness operators so that they can be directly implemented with present technology. [...]
2004 - 10.1103/PhysRevLett.92.087902
Physical review letters, Vol. 92, Issue 8 (February 2004) , p. 087902
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4 p, 104.0 KB |
Atomic Fermi-Bose mixtures in inhomogeneous and random lattices : From Fermi glass to quantum spin glass and quantum percolation
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Sanpera Trigueros, Anna (Institut de Ciències Fotòniques) ;
Kantian, A. (Universität Hannover. Institut für Theoretische Physik) ;
Sánchez Palencia, L. (Universität Hannover. Institut für Theoretische Physik) ;
Zakrzewski, J. (Uniwersytet Jagiellon'ski. Instytut Fizyki (Cracòvia, Polònia)) ;
Lewenstein, Maciej (Institut de Ciències Fotòniques) ;
American Physical Society
We investigate strongly interacting atomic Fermi-Bose mixtures in inhomogeneous and random optical lattices. We derive an effective Hamiltonian for the system and discuss its low temperature physics. [...]
2004 - 10.1103/PhysRevLett.93.040401
Physical review letters, Vol. 93, Issue 4 (July 2004) , p. 040401
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4 p, 107.7 KB |
Quantum key distillation from Gaussian states by Gaussian operations
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Navascués, M. (Institut de Ciències Fotòniques) ;
Bae, J. (Institut de Ciències Fotòniques) ;
Cirac Sasturáin, Juan Ignacio, 1965- (Max-Planck Institut für Quantenoptik) ;
Lewestein, Maciej (Institut de Ciències Fotòniques) ;
Sanpera Trigueros, Anna (Institut de Ciències Fotòniques) ;
Acín, Antonio (Institut de Ciències Fotòniques) ;
American Physical Society
We study the secrecy properties of Gaussian states under Gaussian operations. Although such operations are useless for quantum distillation, we prove that it is possible to distill a secret key secure against any attack from sufficiently entangled Gaussian states with nonpositive partial transposition. [...]
2005 - 10.1103/PhysRevLett.94.010502
Physical review letters, Vol. 94, Issue 1 (January 2005) , p. 010502
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1 p, 214.1 KB |
Nou mètode per detectar estats "exòtics" de la matèria condensada
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Sanpera Trigueros, Anna (Universitat Autònoma de Barcelona. Departament de Física)
El grup de computació quàntica de la UAB ha participat en una recerca internacional que proposa un mètode nou, superior als que existeixen fins ara, per detectar estats "exòtics" de la matèria condensada, de tal manera que la mostra (àtoms ultrafreds) no es destrueixi en ser observada. [...] El grupo de computación cuántica de la UAB ha liderado una investigación que propone un método nuevo, superior a los que existen hasta ahora, para detectar estados "exóticos" de la materia condensada de tal manera que la muestra (átomos ultrafríos) no se destruya al ser observada. [...]
2007
UAB divulga, Novembre 2007, p. 1-1
2 documents
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135 p, 2.6 MB |
Ultracold atomic gases in optical lattices : mimicking condensed matter physics and beyond
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Lewenstein, Maciej (Institut de Ciències Fotòniques) ;
Sanpera Trigueros, Anna (Universitat Autònoma de Barcelona. Departament de Física) ;
Ahufinger, Verònica (Universitat Autònoma de Barcelona. Departament de Física) ;
Damski, Bogdan (Los Alamos National Laboratory. Theory Division) ;
Sen(De), Aditi (Institut de Ciències Fotòniques) ;
Sen, Ujjwal (Institut de Ciències Fotòniques)
We review recent developments in the physics of ultracold atomic and molecular gases in optical lattices. Such systems are nearly perfect realisations of various kinds of Hubbard models, and as such may very well serve to mimic condensed matter phenomena. [...]
2007 - 10.1080/00018730701223200
Advances in Physics, Vol. 56, Núm. 2 2007) , p. 243-379
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