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7 papers · 1 filter
Determining the ensemble N-representability of Reduced Density Matrices
Ofelia B. Oña, Gustavo E. Massaccesi, Pablo Capuzzi +5
The N-representability problem for reduced density matrices remains a fundamental challenge in electronic structure theory. Following our previous work that employs a unitary-evolu…
Parallel-in-time optical simulation of history states
Dudbil Pabón, Lorena Rebón, Sebastián Bordakevich +5
We present an experimental optical implementation of a parallel-in-time discrete model of quantum evolution, based on the entanglement between the quantum system and a finite dimen…
Comment on "Exploring chaos in the Dicke model using ground-state fidelity and the Loschmidt echo"
I. García-Mata, A. J. Roncaglia, D. A. Wisniacki
In [PRE \textbf{90}, 022920 (2014), arXiv:1404.6738] a study of the ground state fidelity of the Dicke model as a function of the coupling parameter is presented. Abrupt jumps of t…
Relaxation of isolated quantum systems beyond chaos
Ignacio García-Mata, Augusto J. Roncaglia, Diego A. Wisniacki
In classical statistical mechanics there is a clear correlation between relaxation to equilibrium and chaos. In contrast, for isolated quantum systems this relation is -- to say th…
Non-Markovian Quantum Dynamics and Classical Chaos
I. Garcia-Mata, C. Pineda, D. A. Wisniacki
We study the influence of a chaotic environment in the evolution of an open quantum system. We show that there is an inverse relation between chaos and non-Markovianity. In particu…
On the distribution of entanglement changes produced by unitary operations
J. Batle, A. R. Plastino, M. Casas +1
We consider the change of entanglement of formation produced by a unitary transformation acting on a general (pure or mixed) state describing a system of two qubits. We st…