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Mostrando ítems 81-90 de 124
Determination of spatial quantum states by using point diffraction interferometry
(IOP Publishing, 2020-11)
We present a method to reconstruct pure spatial qudits of arbitrary dimension d, which is based on a point diffraction interferometer. In the proposed scheme, the quantum states are codified in the discretized transverse ...
Harnessing gauge fields for maximally entangled generation
(2014)
We study the generation of entanglement between two species of bosons living on a ring lattice, where each group of particles can be described by a d-dimensional Hilbert space (qudit). Gauge fields are exploited to create ...
Robustez da fase topológica fracionária ao ruído de fase
(Universidade Federal de Minas GeraisUFMG, 2015-03-13)
In 1984, Berry discovered the geometric phase arising from the geometric structure of the quantum state parameter space and has become an important quantity in Quantum Mechanics. The geometric phase carries the geometric ...
Discrete coherent and squeezed states of many-qudit systems
(2010)
We present a method for orientation-selective enhancement of the first derivatives of an image. The proposed method is based on the polarization properties of the twisted-nematic liquid-crystal displays (LCDs). LCDs are ...
Simplified recursive newton-type algorithm for instantaneous modal parameter estimation of sub-synchronous oscillations
(2012)
We propose a scheme for the deterministic sharing arbitrary qudit states among three distant parties and characterize the set of ideal quantum channels. We also show that the use of non-ideal quantum channels for quantum ...
Correlated multipartite quantum states
(American Physical Society, 2013-03)
We investigate quantum states that possess both maximum entanglement and maximum discord between the pertinent parties. Since entanglement (discord) is defined only for bipartite (two-qubit) systems, we use an appropriate ...
Characterizing d-dimensional quantum channels by means of quantum process tomography
(Optical Society of America, 2018-09)
In this Letter, we propose a simple optical architecture based on phase-only programmable spatial light modulators, in order to characterize general processes on photonic spatial quantum systems in a >2 Hilbert space. We ...
Engenharia de estados espaciais de dimensões híbridas
(Universidade Federal de Minas GeraisUFMG, 2016-03-04)
In recent decades, Parametric Down Conversion (PDC) has been the main method of production of entangled photonic quantum states, most often bipartite. Inaddition, the discretization (withinacertainrange) of transversal ...
Multiphoton Jaynes-Cummings Model: Arbitrary Rotations in Fock Space and Quantum Filters
(2019-03-28)
The multiphoton Jaynes-Cummings model is investigated and applications in quantum information science are explored. Considering the strong atom-field coupling regime and an N-photon interaction, a nonlinear driving field ...