Article
Astronomy & Astrophysics
Marcos A. Arganaraz, Osvaldo M. Moreschi
Summary: This paper presents a definition for a pair of null coordinates adapted to Kerr spacetime, which involve solving a nonlinear differential equation for a scalar function related to Carter's constant. A two-dimensional spacelike family of round surfaces appears in this setting, characterized by Gaussian and extrinsic curvature scalars. The construction provides a double null coordinate system allowing computations over all of the Kerr spacetime.
Article
Physics, Applied
Lianyun Liu, Yue Han, Xu Zheng, Yi Qiu
Summary: When a rotating wave carrying orbital angular momentum experiences an extreme Doppler shift, the observed frequency becomes negative, which is a prerequisite for rotational superradiance. A numerical method is proposed to demonstrate the Doppler shift of the observed frequency and show the formation of acoustic rotating waves in the time domain. The method is instructive for designing experiments with static microphones and exploring the physical insight of the supperadiance phenomenon.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Eric Abraham Hurtado-Aviles, Maria Vila, Juan Jose Vilatela, Hilario Martines-Arano, Jhovani Bornacelli, Jose Antonio Garcia-Merino, Felipe Cervantes-Sodi, Carlos Torres-Torres
Summary: This study reports a significant influence of a magnetic field on the third-order nonlinear optical properties exhibited by aggregated networks of aligned carbon nanotubes, showing that the presence of a magnetic field can modify the optical transmittance in the sample and potentially generate structured light. Numerical simulations were conducted to analyze the magnetic field phenomena and electric field oscillations in the studied sample. Applications of this system to modulate structured light are immediate possibilities.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Optics
Zijun Peng, Qing Wang, Hongshan Chen, Hongyu Liu, Xin Liu, Lison Yan, Jinwei Zhang
Summary: We have successfully generated high-order transverse modes from a Kerr-lens mode-locked femtosecond laser by non-collinear pumping. The generated modes were converted into Laguerre-Gaussian vortex modes using a cylindrical lens mode converter. This work demonstrates the potential of developing Kerr-lens mode-locked bulk lasers with various pure high-order modes and opens up possibilities for generating ultrashort vortex beams.
Article
Mathematics
Sergiu Klainerman, Jeremie Szeftel
Summary: This study is a follow-up of the construction of GCM spheres in perturbations of Kerr, aiming to establish its existence and introduce the definition of angular momentum.
Article
Optics
V. E. Lembessis, K. Koksal, J. Yuan, M. Babiker
Summary: In this study, the optical dipole potential energy of a two-level atom interacting with a circularly polarized Laguerre-Gaussian laser beam of small waist is examined. The presence of a longitudinal electric field component in the beam leads to the appearance of a chiral term in the optical dipole potential energy. A bi-chromatic vortex interaction scheme is proposed to achieve a fully chiral optical dipole potential.
Article
Materials Science, Multidisciplinary
Ayman Al-Khateeb, A. Lyras, V. E. Lembessis, O. M. Aldossary
Summary: We present theoretical results on the transition amplitudes of two-photon transitions induced by a LG(10) beam in a one-activeelectron atomic system. Excitation pathways for selected two-photon transitions starting from the ground state are identified. Numerical evaluations of these transitions in Ca+ are conducted using the truncated summation method. A comparison with Gaussian beam-induced transitions is provided, along with an estimation of the relative strength when employing the two different types of light beams.
RESULTS IN PHYSICS
(2022)
Article
Physics, Particles & Fields
M. Z. Bhatti, Z. Yousaf, S. Hanif
Summary: This study expands on previous research by analyzing the impact of the f(T) gravitational field on static fluid content and electromagnetic field. By calculating a viable formulation of mass and exploring structure scalars, the study investigates the relationship between gravitational interference and mass.
EUROPEAN PHYSICAL JOURNAL C
(2022)
Article
Optics
Jinxing Xue, Candong Liu, Cangtao Zhou, Shuangchen Ruan
Summary: The study confirmed the unique high-harmonic signals with necklace-like shapes generated in a two-color vortex laser field exhibit orbital angular momentum (OAM). The OAM of the necklace harmonics is attributed to tuning the relative intensity of the two driving pulses. The findings provide a new dimension for high-harmonic manipulation in the vortex field.
Article
Optics
Fei Wang, Zhaohui Yang, Yahong Chen, Olga Korotkova, Yangjian Cai
Summary: The general properties of the coherence-orbital angular momentum (COAM) matrix for Schell-model sources with circularly symmetric spectral densities are revealed in this Letter. The structure of the COAM matrix is found to be related to the symmetries of the degree of coherence (DOC). The COAM matrix is diagonal if the DOC is real-valued and rotationally symmetric, and may acquire non-zero off diagonal elements otherwise. A potential application of these results is envisioned for extracting the rotation angle of the DOC of light through measuring the off-axis COAM matrix elements.
Article
Astronomy & Astrophysics
I Cabrera-Munguia
Summary: This paper studies binary systems composed of two unequal co-and counter-rotating extreme Kerr-Newman black holes within the framework of stationary axisymmetric spacetimes. The metric describing both configurations is introduced in a closed analytical form. The obtained results are novel and significant for understanding the merging process.
Article
Optics
Victor V. Kotlyar, Alexey A. Kovalev, Pouria Amiri, Peyman Soltani, Saifollah Rasouli
Summary: The study investigates the topological charge of the sum of two axisymmetric off-axis Laguerre-Gaussian beams, finding that when the indices are the same, the combined beam has the topological charge of one of the individual beams. Different indices result in the sum taking on specific values for the topological charge. Additionally, rules for selecting a feasible topological charge value are established, along with exploring the effects of exchanging and shifting between beams on the topological charge.
Article
Physics, Multidisciplinary
Mauro Fanciulli, Matteo Pancaldi, Emanuele Pedersoli, Mekha Vimal, David Bresteau, Martin Luttmann, Dario De Angelis, Primoz Rebernik Ribic, Benedikt Roesner, Christian David, Carlo Spezzani, Michele Manfredda, Ricardo Sousa, Ioan-Lucian Prejbeanu, Laurent Vila, Bernard Dieny, Giovanni De Ninno, Flavio Capotondi, Maurizio Sacchi, Thierry Ruchon
Summary: This study reports experimental evidence of magnetic helicoidal dichroism observed in the interaction of an extreme ultraviolet vortex beam with a magnetic vortex. Numerical simulations show that this dichroism is based on the interference of light modes with different orbital angular momenta. This observation provides insights into the interplay between orbital angular momentum and magnetism, and sets the framework for developing new analytical tools for investigating ultrafast magnetization dynamics.
PHYSICAL REVIEW LETTERS
(2022)
Article
Optics
Shunyuan Shang, Huajun Yang, Ping Jiang
Summary: This paper derives the analytical expression for the optical field of the Bessel Gauss beam after passing through an optical communication system consisting of two Cassegrain antennas in atmospheric turbulence. By optimizing the parameters, a more precise calculation of the light field is obtained. The energy efficiency of the system is investigated by considering the efficiency of the antennas and reflection losses. The effects of atmospheric turbulence and antenna defocus on the system efficiency are also studied.
Article
Astronomy & Astrophysics
H. Garcia-Compean, V. S. Manko, C. J. Ramirez-Valdez
Summary: Using the concept of thermodynamic length, the first law of thermodynamics for two equal mass Kerr-Newman black holes separated by a massless strut was consistently derived. The expression of the free energy for two generic Kerr-Newman black holes was also proposed in this study.
Article
Physics, Multidisciplinary
I. Cabrera-Munguia
PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS
(2018)
Article
Astronomy & Astrophysics
I. Cabrera-Munguia
Article
Astronomy & Astrophysics
V. S. Manko, E. Ruiz
CLASSICAL AND QUANTUM GRAVITY
(2019)
Article
Astronomy & Astrophysics
V. S. Manko, E. Ruiz
Article
Astronomy & Astrophysics
V. S. Manko, E. Ruiz
Article
Astronomy & Astrophysics
V. S. Manko, E. Ruiz, M. B. Sadovnikova
Article
Astronomy & Astrophysics
V. S. Manko, I. M. Mejia, E. Ruiz
Article
Astronomy & Astrophysics
I Cabrera-Munguia, Etevaldo dos Santos Costa Filho, Hector H. Hernandez, David Vazquez-Valdez
Article
Astronomy & Astrophysics
I. Cabrera-Munguia
Article
Astronomy & Astrophysics
Omar Pedraza, L. A. Lopez, R. Arceo, I Cabrera-Munguia
Summary: In this study, the Hayward black hole surrounded by quintessence is examined based on Kiselev's ideas. Critical values of mass and normalization factor are derived, and the horizons and extremal condition are described. By setting the quintessence state parameter at omega = 2/3, the effective potential is studied, null geodesics for different energies are analyzed, and the behavior of horizons is explored, with the shadow of the black hole being ultimately investigated.
GENERAL RELATIVITY AND GRAVITATION
(2021)
Article
Astronomy & Astrophysics
Etevaldo dos Santos Costa Filho, Angelo Guimaraes, I Cabrera-Munguia
Summary: In this paper, a general formulation of relativistic multipole moments in axistationary electrovac spacetimes is introduced in a closed analytical form. The Ernst potentials on the symmetry axis can be completely characterized by these arbitrary multipole moments, and some concrete applications are developed as well.
GENERAL RELATIVITY AND GRAVITATION
(2022)
Article
Astronomy & Astrophysics
Omar Pedraza, L. A. Lopez, R. Arceo, I Cabrera-Munguia
Summary: This paper investigates the quasinormal modes for scalar, electromagnetic, and gravitational axial perturbations in the Hayward regular black hole surrounded by quintessence (HBH-omega(q)) using the third-order WKB approximation. The dependence of the quasinormal modes on the parameters of the regular black hole and the test fields is determined, and the greybody factor is calculated through numerical analysis to give transmission and reflection coefficients for the scattered wave.
MODERN PHYSICS LETTERS A
(2022)
Article
Astronomy & Astrophysics
I Cabrera-Munguia
Summary: This paper studies binary systems composed of two unequal co-and counter-rotating extreme Kerr-Newman black holes within the framework of stationary axisymmetric spacetimes. The metric describing both configurations is introduced in a closed analytical form. The obtained results are novel and significant for understanding the merging process.
Article
Astronomy & Astrophysics
V. S. Manko, E. Ruiz
Summary: In this paper, two physically meaningful configurations of a pair of equal Kerr-Newman corotating black holes separated by a massless strut are elaborated using the general equatorially symmetric two-soliton solution. The thermodynamic properties of these binary configurations are studied and the first law of thermodynamics taking correctly into account the magnetic field contribution is formulated for each case.
Article
Astronomy & Astrophysics
I. M. Mejia, V. S. Manko, E. Ruiz
