Dipòsit Digital de Documents de la UAB 14 registres trobats  1 - 10següent  anar al registre: La cerca s'ha fet en 0.00 segons. 
1.
170 p, 8.5 MB A Theoretical study on some exotic quantum phase transitions / Yuste Roca, Abel Vicenç, autor. ; Sanpera Trigueros, Anna, supervisor acadèmic. ; Universitat Autònoma de Barcelona. Departament de Física.
El meu doctorat està dedicat a analitzar transicions de fases quàntiques de naturalesa exòtica en sistemes fortament correlacionats descrits per Hamiltonians de spin. D'una banda, m'he centrat en l'estudi de transicions de fase quàntiques localitzades a prop de punts multicr ı́tics. [...]
My Ph. D. is devoted to the analysis of some exotic quantum phase transitions arising in strongly correlated systems described by spin Hamiltonians. On the one hand, my studies have focused on quantum phase transitions occurring close to multicritical points. [...]

[Barcelona] : Universitat Autònoma de Barcelona, 2019.  
2.
11 p, 1.5 MB Thermometry precision in strongly correlated ultracold lattice gases / 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  
3.
140 p, 3.8 MB Quantum metrology and thermometry in open systems : thermal equilibrium and beyond / Mehboudi, Mohammad, autor ; Sanpera Trigueros, Anna, supervisor acadèmic ; Universitat Autònoma de Barcelona. Departament de Física
En mi tesis exploro la metrología cuántica en sistemas abiertos, con especial enfoque en la estimaci ón de temperatura cuántica o termometría. Para este objetivo, voy a clasificar mi estudio en dos regímenes diferentes de equilibrio térmico y más allá del equilibrio térmico. [...]
In my thesis I explore quantum metrology in open systems, with a special focus on quantum temperature estimation, or thermometry. For this aim, I categorize my study in two different regimes of thermal equilibrium and beyond thermal equilibrium. [...]

[Bellaterra] : Universitat Autònoma de Barcelona, 2017  
4.
25 p, 976.0 KB Disordered ultracold atomic gases in optical lattices : a case study of Fermi-Bose mixtures / 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  
5.
8 p, 236.2 KB Quantum-information processing in disordered and complex quantum systems / Sen, Aditi (Institut de Ciències Fotòniques (Castelldefels, Catalunya)) ; Sen, Ujjval (Institut de Ciències Fotòniques (Castelldefels, Catalunya)) ; 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  
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  
7.
4 p, 232.3 KB Experimental detection of multipartite entanglement using witness operators / Bourennane, Mohamed (Max-Planck-Institut für Quantenoptik (Garching, Alemanya)) ; Eibl, Manfred (Max-Planck-Institut für Quantenoptik (Garching, Alemanya)) ; Kurtsiefer, Christian (Ludwig-Maximilians-Universität. Sektion 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  
8.
4 p, 104.0 KB Atomic Fermi-Bose mixtures in inhomogeneous and random lattices : From Fermi glass to quantum spin glass and quantum percolation / Sanpera Trigueros, Anna (Institut de Ciències Fotòniques (Barcelona, Catalunya)) ; 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 (Barcelona, Catalunya)) ; 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  
9.
4 p, 107.7 KB Quantum key distillation from Gaussian states by Gaussian operations / Navascués, M. (Institut de Ciències Fotòniques (Barcelona, Catalunya)) ; Bae, J. (Institut de Ciències Fotòniques (Barcelona, Catalunya)) ; Cirac Sasturáin, Juan Ignacio, 1965- (Max-Planck Institut für Quantenoptik) ; Lewestein, Maciej (Institut de Ciències Fotòniques (Barcelona, Catalunya)) ; Sanpera Trigueros, Anna (Institut de Ciències Fotòniques (Barcelona, Catalunya)) ; Acín, Antonio (Institut de Ciències Fotòniques (Barcelona, Catalunya)) ; 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  
10.
4 p, 915.2 KB Lattice solitons in quasicondensates / Ahufinger, Verònica (Universitat Autònoma de Barcelona. Departament de Física) ; Sanpera Trigueros, Anna (Universität Hannover. Institut für Theoretische Physik) ; American Physical Society
We analyze finite temperature effects in the generation of bright solitons in condensates in optical lattices. We show that even in the presence of strong phase fluctuations solitonic structures with a well defined phase profile can be created. [...]
2005 - 10.1103/PhysRevLett.94.130403
Physical review letters, Vol. 94, Issue 13 (April 2005) , p. 130403  

Dipòsit Digital de Documents de la UAB : 14 registres trobats   1 - 10següent  anar al registre:
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