RSS 1.0Centro de Óptica e Información Cuántica (CQOQI)
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Papers publicados por CQOQI
Contiene los artículos/papers publicados por CQOQI en revistas nacionales e internacionales
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A method to deconvolve stellar profiles The non-rotating line utilizing Gaussian sum approximation
(EDP SCIENCES S A, 2023-08-04)Context. Currently, one of the standard procedures used to determine stellar and wind parameters of massive stars involves to comparing the observed spectral lines with a grid of synthetic lines. These synthetic lines are ... -
Nonlinear optomechanical resonance entering a self-organized energy transfer pattern
(Chaos, Solitons and Fractals, 2023-08)The energy transfer between different subsystems or different vibration modes is always one of the most interested problems in the study of the resonance phenomena in coupled nonlinear dynamical systems. With an optomechanical ... -
Bayesian sampling with BeAtlas, a grid of synthetic Be star spectra I. Recovering the fundamental parameters of α Eri and β CMi
(Oxford University Press, 2023-09)Classical B emission (Be) stars are fast rotating, near-main-sequence B-type stars. The rotation and the presence of circumstellar discs profoundly modify the observables of active Be stars. Our goal is to infer stellar ... -
Mutual Information and Quantum Discord in Quantum State Discrimination with a Fixed Rate of Inconclusive Outcomes
(MDPI, 2021-01)We studied the mutual information and quantum discord that Alice and Bob share when Bob implements a discrimination with a fixed rate of inconclusive outcomes (FRIO) onto two pure non-orthogonal quantum states, generated ... -
Efficient ground state cooling of a membrane by the combination of continuous-wave field and pulses
(IOP Publishing Ltd, 2021-05-28)We present an approach that realizes the ground state cooling of the membrane-in-middle optomechanical system. Instead of straightforwardly using the continuous-wave (CW) or pulsed external drives, we consider the combinations ... -
Influence of squeezing on the weak-to-strong measurement transition
(AMER PHYSICAL SOC, 2021-06-11)In this work, we study the measurement transition for a coherent squeezed pointer state through a transition factor Gamma that involves a system-pointer coupling by using an arbitrary measured observable A. In addition, ... -
Fisher Information, Weak Values and Correlated Noise in Interferometry
(Cornell University, 2019-02-25)In this article we present an experimental proposal for quantum enhanced estimation of optomechanical parameters. The precision of the estimation is improved by using the technique of weak value amplification, which can ... -
Photon cooling by dispersive atom-field coupling with atomic postselection
(Cornell University, 2019-04-16)We propose, in a Ramsey interferometer, to cool the cavity field to its ground state, starting from a thermal distribution by a dispersive atom-field coupling followed by an atomic postselection. We also analyze the effect ... -
Phonon maser stimulated by spin postselection
(American Physical Society, 2020-06-09)In a sequence of single spins interacting longitudinally with a mechanical oscillator, and using the micromaser model with random injection, we show that after an appropriate postselection of each spin, a phonon laser ... -
PT-symmetric phonon laser under gain saturation effect
(The Optical Society, 2020-07-20)As an analog of optical laser, phonon laser has potential applications in various areas. We study a type of phonon laser implemented by two coupled micro-cavities, one of which carries optical gain medium. The phonon laser ... -
Mechanical oscillations frozen on discrete levels by two optical driving fields
(American Physical Society, 2020-07-20)We report a synchronization phenomenon which is simulated with an optomechanical system driven by two equally strong fields with different frequencies. Once the frequencies of the driving fields are properly matched, the ... -
Semi-exact solutions of sextic potential plus a centrifugal term
(SPRINGER, 2020-11)We revisit the one-dimensional quantum system of a sextic potential added with a centrifugal term, V(x)=ax(-2)+bx(2)+cx(4)+dx(6), where the parameters a,b,c and d are arbitrary. We find that its solutions can be expressed ... -
Control of interference and diffraction of a three-level atom in a double-slit scheme with cavity fields
(American Physical Society, 2020-09-28)A double-cavity with a quantum mechanical and a classical field is placed immediately behind a double-slit in order to analyze the wave-particle duality. Both fields have common nodes and antinodes through which a three-level ... -
Ultra-high optical nonreciprocity with a coupled triple-resonator structure
(IOP Publishing Ltd., 2021)Optical transmission nonreciprocity as a widely investigated phenomenon is essential to various applications. Many sophisticated mechanisms have been proposed and tested for achieving the optical nonreciprocity on integrated ... -
Controlling parameters of the wave-particle duality of a two-level atom in a double-slit scheme with cavity field
(The Optical Society, 2021-01)A double-slit scheme placed immediately before a standing wave allows one to establish two possible paths for the passage of an atom. Each path matches with a node or antinode of the wave. The atom–field interaction is ... -
Mutual Information and Quantum Discord in Quantum State Discrimination with a Fixed Rate of Inconclusive Outcomes
(MDPI Multidisciplinary Digital Publishing Institute, 2021-01-6)We studied the mutual information and quantum discord that Alice and Bob share when Bob implements a discrimination with a fixed rate of inconclusive outcomes (FRIO) onto two pure non-orthogonal quantum states, generated ... -
Coherence as a measure for non-Markovianity and its applications to color centers in diamond
(American Physical Society, 2019-04-30)The degree of non-Markovianity of a continuous bath can be quantified by means of the coherence. This simple measure is experimentally accessible through Ramsey spectroscopy, but it is limited to incoherent dynamical maps. ... -
Macroscopic nonclassical-state preparation via postselection
(American Physical Society, 2017)Macroscopic quantum superposition states are fundamental to test the classical-quantum boundary and present suitable candidates for quantum technologies. Although the preparation of such states has already been realized, ... -
Stimulated Raman adiabatic control of a nuclear spin in diamond
(American Physical Society, 2017)Coherent manipulation of nuclear spins is a highly desirable tool for both quantum metrology and quantum computation. However, most of the current techniques to control nuclear spins lack fast speed, impairing their ... -
The power of a control qubit in weak measurements
(NATURE PUBLISHING GROUP, 2017)In the late 80 s, a curious effect suggested by Aharanov et al. was found to lead to an anomalous amplification based on quantum measurements of weakly coupled systems. In this paper, we investigate the quantum control of ...