67 citations · 263 across the 25 of their papers we have counts for
16 papers · 1 filter
Quantum-based solution of time-dependent complex Riccati equations
D. Martínez-Tibaduiza, C. González-Arciniegas, C. Farina +2
Using the Wei-Norman theory we obtain a time-dependent complex Riccati equation (TDCRE) as the solution of the time evolution operator (TEO) of quantum systems described by time-de…
Algebraic approach to a two-qubit quantum thermal machine
A. C. Duriez, D. Martínez-Tibaduiza, A. Z. Khoury
Algebraic methods for solving time dependent Hamiltonians are used to investigate the performance of quantum thermal machines. We investigate the thermodynamic properties of an eng…
Reconstructing the full modal structure of photonic states by stimulated emission tomography
Arne Keller, Antonio Zelaquett Khoury, Nicolas Fabre +4
Stimulated emission tomography is a powerful and successful technique to both improve the resolution and experimentally simplify the task of determining the modal properties of bip…
Quantum-controlled cluster states
R. F. Barros, G. B. Alves, O. Pfister +1
Quantum optical cluster states have been increasingly explored, in the light of their importance for measurement-based quantum computing. Here we set forth a new method for generat…
Bell inequality violation and operator ordering in quantum theory
H. M. Faria, K. Dechoum, A. Z. Khoury
We investigate the role played by quantum operator ordering in the correlations that characterize two-photon polarization Bell measurements. The Clauser-Horne-Shimony-Holt (CHSH) c…
Astigmatic tomography of orbital angular momentum superpositions
B. Pinheiro da Silva, D. S. Tasca, E. F. Galvão +1
We use astigmatic transformations to characterize two-dimensional superpositions of Orbital Angular Momentum (OAM) states in laser beams. We propose two methods for doing this, bot…
Intrinsic bounds of a two-qudit random evolution
A. Z. Khoury, A. M. Souza, L. E. Oxman +3
We investigate entangled qudits evolving under random, local operations and demonstrate that this evolution is constrained by intrinsic bounds, showing robust features of t…
Experimental observation of fractional topological phases with photonic qudits
A. A. Matoso, X. Sánchez-Lozano, W. M. Pimenta +6
Geometrical and topological phases play a fundamental role in quantum theory. Geometric phases have been proposed as a tool for implementing unitary gates for quantum computation.…
Three-qubit topological phase on entangled photon pairs
Markus Johansson, Antonio Z. Khoury, Kuldip Singh +1
We propose an experiment to observe the topological phases associated with cyclic evolutions, generated by local SU(2) operations, on three-qubit entangled states prepared on diffe…
Playing a quantum game on polarization vortices
A. R. C. Pinheiro, C. E. R. Souza, D. P. Caetano +3
The quantum mechanical approach to the well known prisoners dilemma, one of the basic examples to illustrate the concepts of Game Theory, is implemented with a classical optical re…
Cauchy-Schwarz characterization of tripartite quantum correlations in an optical parametric oscillator
K. Dechoum, W. S. Marques, A. Z. Khoury
We analyze the three-mode correlation properties of the electromagnetic field in a optical parametric oscillator below threshold. We employ a perturbative expansion of the Itô equa…
Environment-induced entanglement with a single photon
Malena Hor-Meyll, Adriana Auyuanet, Carolina Borges +4
We propose an all-optical setup, which couples different degrees of freedom of a single photon, to investigate entanglement generation by a common environment. The two qubits are r…
Entanglement in the above-threshold optical parametric oscillator
Alessandro S. Villar, Katiuscia N. Cassemiro, Kaled Dechoum +3
We investigate entanglement in the above-threshold Optical Parametric Oscillator, both theoretically and experimentally, and discuss its potential applications to quantum informati…
Optical parametric oscillation under injection of orbital angular momentum
B. Coutinho dos Santos, C. E. R. Souza, K. Dechoum +1
We present a theoretical model for the spatial mode dynamics of an optical parametric oscillator under injection of orbital angular momentum. This process is then interpreted in te…
Quantum phase-space analysis of the pendular cavity
M. K. Olsen, A. B. Melo, K. Dechoum +1
We perform a quantum mechanical analysis of the pendular cavity, using the positive-P representation, showing that the quantum state of the moving mirror, a macroscopic object, has…
Propagation of the Angular Spectrum in the Up-conversion
D. P. Caetano, M. P. Almeida, P. H. Souto Ribeiro +2
We study theoretical and experimentally the propagation of the angular spectrum of the light produced in the up-conversion process. The connection between the angular spectrum of t…