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Predicting spinor condensate dynamics from simple principles
M. Moreno-Cardoner, J. Mur-Petit, M. Guilleumas +3
We study the spin dynamics of quasi-one-dimensional F=1 condensates both at zero and finite temperatures for arbitrary initial spin configurations. The rich dynamical evolution exh…
Ultracold Bose Gases in 1D Disorder: From Lifshits Glass to Bose-Einstein Condensate
Pierre Lugan, David Clément, Philippe Bouyer +3
We study an ultracold Bose gas in the presence of 1D disorder for repulsive inter-atomic interactions varying from zero to the Thomas-Fermi regime. We show that for weak interactio…
Analysis of Localization Phenomena in Weakly Interacting Disordered Lattice Gases
T. Schulte, S. Drenkelforth, J. Kruse +6
Disorder plays a crucial role in many systems particularly in solid state physics. However, the disorder in a particular system can usually not be chosen or controlled. We show tha…
Quantum polarization spectroscopy of ultracold spinor gases
K. Eckert, L. Zawitkowski, A. Sanpera +2
We propose a method for the detection of ground state quantum phases of spinor gases through a series of two quantum nondemolition measurements performed by sending off-resonant, p…
Error-Resistant Distributed Quantum Computation in Trapped Ion Chain
Sibylle Braungardt, Aditi Sen De, Ujjwal Sen +1
We consider experimentally feasible chains of trapped ions with pseudo-spin 1/2, and find models that can potentially be used to implement error-resistant quantum computation. Simi…
Trapped Ion Chain as a Neural Network: Error Resistant Quantum Computation
Marisa Pons, Veronica Ahufinger, Christof Wunderlich +5
We demonstrate the possibility of realizing a neural network in a chain of trapped ions with induced long range interactions. Such models permit one to store information distribute…
Controlling high-harmonic generation and above-threshold ionization with an attosecond-pulse train
C. Figueira de Morisson Faria, P. Salieres, P. Villain +1
We perform a detailed analysis of how high-order harmonic generation (HHG) and above-threshold ionization (ATI) can be controlled by a time-delayed attosecond-pulse train superpose…
Ultracold atomic gases in optical lattices: mimicking condensed matter physics and beyond
Maciej Lewenstein, Anna Sanpera, Veronica Ahufinger +3
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 m…
Disorder versus the Mermin-Wagner-Hohenberg effect: From classical spin systems to ultracold atomic gases
Jan Wehr, Armand Niederberger, Laurent Sanchez-Palencia +1
We propose a general mechanism of random-field-induced order (RFIO), in which long-range order is induced by a random field that breaks the continuous symmetry of the model. We par…
Ordered structures in rotating ultracold Bose gases
N. Barberan, M. Lewenstein, K. Osterloh +1
The characterization of small samples of cold bosonic atoms in rotating microtraps has recently attracted increasing interest due to the possibility to deal with a few number of pa…
Remark on a Group-Theoretical Formalism for Quantum Mechanics and the Quantum-to-Classical Transition
J. K. Korbicz, M. Lewenstein
We sketch a group-theoretical framework, based on the Heisenberg-Weyl group, encompassing both quantum and classical statistical descriptions of mechanical systems. We re-define in…
Ultracold atomic Bose and Fermi spinor gases in optical lattices
K. Eckert, L. Zawitkowski, M. J. Leskinen +2
We investigate magnetic properties of Mott-insulating phases of ultracold Bose and Fermi spinor gases in optical lattices. We consider in particular the F=2 Bose gas, and the F=3/2…
Group theoretical approach to entanglement
J. K. Korbicz, M. Lewenstein
We present a novel, universal description of quantum entanglement using group theory and generalized characteristic functions. It leads to new reformulations of the separability pr…
Generalized spin squeezing inequalities in qubit systems: theory and experiment
J. K. Korbicz, O. Gühne, M. Lewenstein +3
We present detailed derivations, various improvements and application to concrete experimental data of spin squeezing inequalities formulated recently by some of us [Phys. Rev. Let…