Manuel Torres
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View article: Unveiling the nature of the Einstein Probe transient EP 241021a
Unveiling the nature of the Einstein Probe transient EP 241021a Open
We present a multi-wavelength analysis of the fast X-ray transient EP 241021a, discovered by the Wide-field X-ray Telescope aboard the \emph{Einstein Probe} satellite on 2024 October 21. The event was not detected in gamma-rays. Follow-up …
View article: Gradient-descent methods for fast quantum state tomography
Gradient-descent methods for fast quantum state tomography Open
Quantum state tomography (QST) is a widely employed technique for characterizing the state of a quantum system. However, it is plagued by two fundamental challenges: computational and experimental complexity grows exponentially with the nu…
View article: The orbital period and inclination of the neutron star X-ray transient MAXI J1807+132
The orbital period and inclination of the neutron star X-ray transient MAXI J1807+132 Open
The neutron star X-ray transient MAXI J1807+132 has undergone outbursts in 2017, 2019, and 2023. We conducted an $R$-band time series photometry campaign using the Isaac Newton Telescope during the 2022 quiescent state. We detected a perio…
View article: Revisiting the fundamental parameters for the black hole X-ray transient Swift J1753.5-0127
Revisiting the fundamental parameters for the black hole X-ray transient Swift J1753.5-0127 Open
We present time-resolved Gran Telescopio Canarias optical spectroscopy and William Herschel Telescope $i$-band photometry of the X-ray transient SWIFT J1753.5-0127 in quiescence. The $i$-band light curve is dominated by flickering with an …
View article: State-dependent signatures of jets and winds in the optical and infrared spectrum of the black hole transient GX 339$-$4
State-dependent signatures of jets and winds in the optical and infrared spectrum of the black hole transient GX 339$-$4 Open
GX 339$-$4 is one of the prototypical black hole X-ray transients, exhibiting recurrent outbursts that allow detailed studies of black hole accretion and ejection phenomena. In this work we present four epochs of optical and near-infrared …
View article: Azimuthal Correlation Anisotropies in p + p Collisions Simulated by Pythia
Azimuthal Correlation Anisotropies in p + p Collisions Simulated by Pythia Open
Stimulated by the keen interest of possible collective behavior in high-energy proton-proton and proton-nucleus collisions, we study two-particle angular correlations in pseudorapidity and azimuthal differences in simulated p + p interacti…
View article: Multi-kinks in scalar field theories with non-degenerate vacua: The commensurable and non degenerate double sine-Gordon model
Multi-kinks in scalar field theories with non-degenerate vacua: The commensurable and non degenerate double sine-Gordon model Open
This paper considers generic scalar fields models in one space dimension,the potentials of which have several vacuum states. It is shown that the partial breaking of the vacuum degeneracy provides a mechanism for the appearance of static m…
View article: Kink solutions in a generalized scalar φ <sup>4</sup> <sub>G</sub> field model
Kink solutions in a generalized scalar φ <sup>4</sup> <sub>G</sub> field model Open
We study a scalar field model in a two dimensional space-time with a generalized potential which has four minima, obtaining novel kink solutions with well defined properties although the potential is non-analytical at the origin. T…
View article: Kink solutions in a generalized scalar $ϕ^4_G$ field model
Kink solutions in a generalized scalar $ϕ^4_G$ field model Open
We study a scalar field model in a two dimensional space-time with a generalized $ϕ^4_G$ potential which has four minima, obtaining novel kink solutions with well defined properties although the potential is non-analytical at the origin. T…
View article: Kink solutions in a generalized scalar $\phi^4_G$ field model
Kink solutions in a generalized scalar $\phi^4_G$ field model Open
We study a scalar field model in a two dimensional space-time with a generalized $\phi^4_G$ potential which has four minima, obtaining novel kink solutions with well defined properties although the potential is non-analytical at the origin…