399 citations · 1.2k across the 36 of their papers we have counts for
34 papers · 1 filter
Stimulated Parametric Down-Conversion: From Foundational Coherence to Structured Light Applications
M. F. Z. Arruda, M. G. Damaceno, G. H. dos Santos +4
Stimulated parametric down-conversion (StimPDC) is the seeded version of the process that underlies much of photonic quantum information. Replacing the vacuum at one input port wit…
High-Dimensional Deterministic Secure Quantum Communication with Reed-Solomon Erasure Coding
L. F. A. de Sousa Moura, G. L. Zanin, P. H. Souto Ribeiro +1
Deterministic Secure Quantum Communication (DSQC) is a quantum cryptographic technique engineered to transfer a message through a quantum channel, requiring an auxiliary classical…
Coincidence free certification and quantification of spatial entanglement with stimulated parametric down conversion
M. G. Damaceno, G. H. dos Santos, N. Rubiano da Silva +2
Using stimulated emission, a photon pair source can be characterized by seeding the signal mode with a bright classical beam and measuring the stimulated idler field, thus replacin…
Twisted Gaussian Schell States in Quantum Optics: Twist-Assisted Nonclassicality and Entanglement
Fabricio Toscano, G. Cañas, A. Z. Khoury +2
We introduce the Twisted Gaussian Schell (TGS) state, a two-mode mixed Gaussian state defined as the quantum-optical analog of the Twisted Gaussian Schell-model beam of classical p…
Photonic entanglement with accelerated light
R. C. Souza Pimenta, G. H. dos Santos, A. B. Barreto +2
Accelerated light has been demonstrated with laser light and diffraction. Within the diffracting field it is possible to identify a portion that carries most of the beam energy, wh…
Identifying primes from entanglement dynamics
A. L. M. Southier, L. F. Santos, P. H. Souto Ribeiro +1
Factorization is the most fundamental way to determine if a number is prime or composite. Yet, this approach becomes impracticable when considering large values of , a diffi…
Enhanced Photonic Maxwell's Demon with Correlated Baths
Guilherme L. Zanin, Michael Antesberger, Maxime J. Jacquet +3
Maxwell's Demon is at the heart of the interrelation between quantum information processing and thermodynamics. In this thought experiment, a demon generates a temperature gradient…
Experimental study of quantum thermodynamics using optical vortices
R. Medeiros de Araújo, T. Häffner, R. Bernardi +6
Non-equilibrium thermodynamics and quantum information theory are interrelated research fields witnessing an increasing interest, both theoretical and experimental. This is manly d…
Work distribution in a photonic system
M. A. A. Talarico, P. B. Monteiro, E. C. Mattei +3
We present a proposal of a set-up to measure the work distribution due to an arbitrary unitary process acting on the spatial transverse degrees of freedom of a light beam. Hermite-…
Deterministic Quantum Computation With One Photonic Qubit
M. Hor-Meyll, D. S. Tasca, S. P. Walborn +3
We show that deterministic quantum computing with one qubit (DQC1) can be experimentally implemented with a spatial light modulator, using the polarization and the transverse spati…
Testing for entanglement with periodic coarse-graining
Daniel S. Tasca, Łukasz Rudnicki, Reuben S. Aspden +3
Continuous variables systems find valuable applications in quantum information processing. To deal with an infinite-dimensional Hilbert space, one in general has to handle large nu…
Experimental determination of multipartite entanglement with incomplete information
G. H. Aguilar, S. P. Walborn, P. H. Souto Ribeiro +1
Multipartite entanglement is very poorly understood despite all the theoretical and experimental advances of the last decades. Preparation, manipulation and identification of this…
Non-Markovianity through flow of information between a system and an environment
S. Haseli, G. Karpat, S. Salimi +6
Exchange of information between a quantum system and its surrounding environment plays a fundamental role in the study of the dynamics of open quantum systems. Here we discuss the…
Experimental entanglement redistribution under decoherence channels
G. H. Aguilar, A. Valdés-Hernández, L. Davidovich +2
When an initially entangled pair of qubits undergoes local decoherence processes, there are a number of ways in which the original entanglement can spread throughout the multiparti…
Characterization of a spatial light modulator as a polarization quantum channel
G. Barreto Lemos, J. O. de Almeida, S. P. Walborn +2
Spatial light modulators are versatile devices employed in a vast range of applications to modify the transverse phase or amplitude profile of an incident light beam. Most experime…
Ancilla-assisted measurement of photonic spatial correlations and entanglement
M. Hor-Meyll, J. O. de Almeida, G. B. Lemos +2
We report an experiment in which the moments of spatial coordinates of down-converted photons are measured directly, without having to reconstruct any marginal probability distribu…
Non-Markovianity through accessible information
F. F. Fanchini, G. Karpat, B. Çakmak +6
The degree of non-Markovianity of quantum processes has been characterized in several different ways in the recent literature. However, the relationship between the non-Markovian b…
Linear-optical simulation of the cooling of a cluster-state Hamiltonian system
G. H. Aguilar, T. Kolb, D. Cavalcanti +4
A measurement-based quantum computer could consist of a local-gapped Hamiltonian system, whose thermal states --at sufficiently low temperature-- are universal resources for the co…
Flow of Quantum Correlations from a Two-Qubit System to its Environment
G. H. Aguilar, O. Jiménez Farías, A. Valdes-Hernández +3
The open-system dynamics of entanglement plays an important role in the assessment of the robustness of quantum information processes and also in the investigation of the classical…
Experimental Observation of Quantum Chaos in a Beam of Light
G. B. Lemos, R. M. Gomes, S. P. Walborn +2
The manner in which unpredictable chaotic dynamics manifests itself in quantum mechanics is a key question in the field of quantum chaos. Indeed, very distinct quantum features can…
Emergence of the pointer basis through the dynamics of correlations
M. F. Cornelio, O. Jiménez Farías, F. F. Fanchini +7
We use the classical correlation between a quantum system being measured and its measurement apparatus to analyze the amount of information being retrieved in a quantum measurement…
Experimental investigation of dynamical invariants in bipartite entanglement
O. Jiménez Farías, A. Valdés Hernández, G. H. Aguilar +5
The non-conservation of entanglement, when two or more particles interact, sets it apart from other dynamical quantities like energy and momentum. It does not allow the interpretat…
Local solutions of Maximum Likelihood Estimation in Quantum State Tomography
Douglas S. Gonçalves, Márcia A. Gomes-Ruggiero, Carlile Lavor +2
Maximum likelihood estimation is one of the most used methods in quantum state tomography, where the aim is to reconstruct the density matrix of a physical system from measurement…
Production of optical phase space vortices with non-locally distributed mode converters
R. M. Gomes, A. Salles, F. Toscano +2
Optical vortices have been observed in a wide variety of optical systems. They can be observed directly in the wavefront of optical beams, or in the correlations between pairs of e…