286 citations · 1.2k across the 22 of their papers we have counts for
22 papers
Quantum coherence and the principle of microscopic reversibility
K. Khan, W. F. Magalhaes, Jailson S. Araujo +2
The principle of microscopic reversibility is a fundamental element in the formulation of fluctuation relations and the Onsager reciprocal relations. As such, a clear description o…
Two-point measurement of entropy production from the outcomes of a single experiment with correlated photon pairs
Gabriel H. Aguilar, Thaís L. Silva, Thiago E. Guimarães +3
Fluctuation theorems are one of the pillars of non-equilibrium thermodynamics. Broadly speaking, they concern the statistical distribution of quantities such as heat, work or entro…
Experimental demonstration of phase estimation advantage in presence of depolarizing noise by using coherent measurements
R. S. Piera, S. P. Walborn, G. H. Aguilar
We report an experimental investigation of the role of measurement in quantum metrology when the states of the probes are mixed. In particular, we investigated optimized local meas…
Interferometric sensing of the tilt angle of a Gaussian beam
S. P. Walborn, G. H. Aguilar, P. L. Saldanha +2
We investigate interferometric techniques to estimate the deflection angle of an optical beam and compare them to the direct detection of the beam deflection. We show that quantum…
Robust interferometric sensing using two-photon interference
G. H. Aguilar, R. S. Piera, P. L. Saldanha +2
Precise measurement of the angular deviation of an object is a common task in science and technology. Many methods use light for this purpose. Some of these exploit interference ef…
Detection of quantum non-Markovianity close to the Born-Markov approximation
Thais de Lima Silva, Stephen P. Walborn, Marcelo F. Santos +2
We calculate in an exact way the conditional past-future correlation for the decay dynamics of a two-level system in a bosonic bath. Different measurement processes are considered.…
Exposure of subtle multipartite quantum nonlocality
M. M. Taddei, T. L. Silva, R. V. Nery +3
The celebrated Einstein-Podolsky-Rosen quantum steering has a complex structure in the multipartite scenario. We show that a naively defined criterion for multipartite steering all…
Distillation of quantum steering
R. V. Nery, M. M. Taddei, P. Sahium +3
We show -- both theoretically and experimentally -- that Einstein-Podolsky-Rosen steering can be distilled. We present a distillation protocol that outputs a perfectly correlated s…
Experimental investigation of linear-optics-based quantum target detection
G. H. Aguilar, M. A. de Souza, R. M. Gomes +4
The development of new techniques to improve measurements is crucial for all sciences. By employing quantum systems as sensors to probe some physical property of interest allows th…
Entanglement between more than two hundred macroscopic atomic ensembles in a solid
P. Zarkeshian, C. Deshmukh, N. Sinclair +12
We create a multi-partite entangled state by storing a single photon in a crystal that contains many large atomic ensembles with distinct resonance frequencies. The photon is re-em…
Heralded single photons based on spectral multiplexing and feed-forward control
M. Grimau Puigibert, G. H. Aguilar, Q. Zhou +6
We propose and experimentally demonstrate a novel approach to a heralded single photon source based on spectral multiplexing (SMUX) and feed-forward-based spectral manipulation of…
Experimental multipartite entanglement and randomness certification of the W state in the quantum steering scenario
A. Máttar, P. Skrzypczyk, G. H. Aguilar +4
Recently [Cavalcanti \textit{et al.} Nat Commun \textbf{6}, 7941 (2015)] proposed a method to certify the presence of entanglement in asymmetric networks, where some users do not h…
Quantum teleportation across a metropolitan fibre network
Raju Valivarthi, Marcel. li Grimau Puigibert, Qiang Zhou +7
If a photon interacts with a member of an entangled photon pair via a so-called Bell-state measurement (BSM), its state is teleported over principally arbitrary distances onto the…
Detection of entanglement in asymmetric quantum networks and multipartite quantum steering
D. Cavalcanti, P. Skrzypczyk, G. H. Aguilar +3
The future of quantum communication relies on quantum networks composed by observers sharing multipartite quantum states. The certification of multipartite entanglement will be cru…
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…
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…
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…