121 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of LisbonPT135 papers
- Instituto Superior TécnicoPT23 papers
- Universidade Lusófona de Humanidades e TecnologiasPT23 papers
- Iscte – Instituto Universitário de LisboaPT8 papers
- Mathematical Institute of the Serbian Academy of Sciences and Arts7 papers
- Serbian Academy of Sciences and ArtsRS7 papers
- Universidad Complutense de MadridES7 papers
- Universidade LusófonaPT7 papers
- Universidade Técnica de LisboaPT7 papers
- University of AlgarvePT7 papers
- Instituto de Plasmas e Fusão NuclearPT6 papers
- Scuola Internazionale Superiore di Studi AvanzatiIT5 papers
12 papers · 1 filter
Dynamical quantum phase transitions from random matrix theory
David Pérez-García, Leonardo Santilli, Miguel Tierz
We uncover a novel dynamical quantum phase transition, using random matrix theory and its associated notion of planar limit. We study it for the isotropic XY Heisenberg spin chain.…
Boundaries and profiles in the Wigner formalism
Nuno Costa Dias, João Nuno Prata
We consider a quantum device contained in an interval in the context of the Weyl-Wigner formalism. This approach was originally suggested by Frensley, and is known to be plagued wi…
Entanglement and separability in the noncommutative phase-space scenario
Alex E. Bernardini, Catarina Bastos, Orfeu Bertolami +2
Quantumness and separability criteria for continuous variable systems are discussed for the case of a noncommutative (NC) phase-space. In particular, the quantum nature and the ent…
Deformation Quantization of Confined Systems
Nuno Costa Dias, Joao Nuno Prata
The Weyl-Wigner formulation of quantum confined systems poses several interesting problems. The energy stargenvalue equation, as well as the dynamical equation does not display the…
Features of Moyal Trajectories
Nuno Costa Dias, Joao Nuno Prata
We study the Moyal evolution of the canonical position and momentum variables. We compare it with the classical evolution and show that, contrary to what is commonly found in the l…
Quantum control in infinite dimensions
Witold Karwowski, R. Vilela Mendes
Accurate control of quantum evolution is an essential requirement for quantum state engineering, laser chemistry, quantum information and quantum computing. Conditions of controlla…
Quantum sensitive dependence
V. I. Man'ko, R. Vilela Mendes
Wave functions of bounded quantum systems with time-independent potentials, being almost periodic functions, cannot have time asymptotics as in classical chaos. However, bounded qu…
Quantum computation by quantum-like systems
M. A. Man'ko, V. I. Man'ko, R. Vilela Mendes
Using a quantumlike description for light propagation in nonhomogeneous optical fibers, quantum information processing can be implemented by optical means. Quantum-like bits (qulbi…
Lyapunov exponent in quantum mechanics. A phase-space approach
V. I. Man'ko, R. Vilela Mendes
Using the symplectic tomography map, both for the probability distributions in classical phase space and for the Wigner functions of its quantum counterpart, we discuss a notion of…
Saddle scars: Existence and applications
R. Vilela Mendes
A quantum scar is a wave function which displays an high intensity in the region of a classical unstable periodic orbit. Saddle scars are states related to the unstable harmonic mo…
Collision states and scar effects in charged three-body problems
R. Vilela Mendes
Semiclassical methods form a bridge between classical systems and their quantum counterparts. An interesting phenomenon discovered in this connection is the scar effect, whereby en…
On the nonlinearity interpretation of q- and f-deformation and some applications
V. I. Man'ko, R. Vilela Mendes
q-oscillators are associated to the simplest non-commutative example of Hopf algebra and may be considered to be the basic building blocks for the symmetry algebras of completely i…