50 citations · 100 across the 9 of their papers we have counts for
9 papers
Chaos-based Potentials in the One-dimensional Tight-binding Model Probed by the Inverse Participation Ratio
Weslley Florentino de Oliveira, Giancarlo Queiroz Pellegrino
Chaos-based potentials are defined and implemented in the one-dimensional tight-binding model as a way of simulating disorder-controlled crystalline lattices. In this setting, diso…
Quantum phase transition in an effective three-mode model of interacting bosons
H. M. Frazão, J. G. Peixoto de Faria, G. Q. Pellegrino +1
In this work we study an effective three-mode model describing interacting bosons. These bosons can be considered as exciton-polaritons in a semiconductor microcavity at the magic…
Analysis of quantum phase transition in some different Curie-Weiss models: a unified approach
Carla Maria Pontes Carneiro, Giancarlo Queiroz Pellegrino
A unified approach to the analysis of quantum phase transitions in some different Curie-Weiss models is proposed such that they are treated and analyzed under the same general sche…
Application of an inverse Holstein-Primakoff transformation to the Jaynes-Cummings model
Carla Maria Pontes Carneiro, Giancarlo Queiroz Pellegrino
A modification of the Holstein-Primakoff transformation is proposed such that creation and annihilation operators for a bosonic field are rewritten as operators of a algebr…
Quantum Entanglement and fixed point Hopf bifurcation
M. C. Nemes, K. Furuya, G. Q. Pellegrino +3
We present the qualitative differences in the phase transitions of the mono-mode Dicke model in its integrable and chaotic versions. We show that a first order phase transition occ…
Persistent current and Drude weight in one-dimensional rings with substitution potentials
Giancarlo Queiroz Pellegrino
Persistent currents and Drude weights are investigated for the tight-binding approximation to one-dimensional rings threaded by a magnetic flux and with potential given by some alm…
Recoherence in the entanglement dynamics and classical orbits in the N-atom Jaynes-Cummings model
Renato M. Angelo, Kyoko Furuya, M. Carolina Nemes +1
The rise in linear entropy of a subsystem in the N-atom Jaynes-Cummings model is shown to be strongly influenced by the shape of the classical orbits of the underlying classical ph…
(De)Localization in the Prime Schrodinger Operator
Cesar R. de Oliveira, Giancarlo Q. Pellegrino
It is reported a combined numerical approach to study the localization properties of the one-dimensional tight-binding model with potential modulated along the prime numbers. A loc…
Quantum Return Probability for Substitution Potentials
Cesar R. de Oliveira, Giancarlo Q. Pellegrino
We propose an effective exponent ruling the algebraic decay of the average quantum return probability for discrete Schrodinger operators. We compute it for some non-periodic substi…