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Kerr black hole shadows cast by extraordinary light rays with Weyl corrections

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Science China(Physics,Mechanics & Astronomy) 2024年第5期67卷 18-26页

作者： Songbai Chen jiliang jing Department of Physics Institute of Interdisciplinary StudiesKey Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of EducationSynergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal UniversityChangsha 410081China Center for Gravitation and Cosmology College of Physical Science and TechnologyYangzhou UniversityYangzhou 225009China

We investigate the equation of motion for photons with Weyl corrections in a Kerr black hole spacetime in a small coupling *** results show that Weyl corrections yield phenomena of *** light rays propagating in the spacetime are separated into the ordinary rays and the extraordinary rays,and the propagation of the latter depends on the *** probe the effects of Weyl corrections on the Kerr black hole shadows casted by the extraordinary rays and find that such corrections result in a weak stretching or squeezing in the vertical direction for the black hole ***,we also study the change of the length of the Near-Horizon Extremal Kerr line(NHEK line)with Weyl *** features could help us to understand the electrodynamics with Weyl corrections from black hole shadows.

关键词： correction light stretching

Test of a model coupling of electromagnetic and gravitational fields by using high-frequency gravitational waves

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Science China(Physics,Mechanics & Astronomy) 2021年第5期64卷 22-27页

作者： Yinhua Zou Mengjie Wang jiliang jing Department of Physics Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Educationand Synergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal UniversityChangsha 410081China

Models of the coupling of electromagnetic and gravitational fields have been studied extensively for many years. In this paper,we consider the coupling between the Maxwell field and the Weyl tensor of the gravitational field to study how the wavevector of the electromagnetic wave is affected by a plane gravitational wave. We find that the wavevector depends upon the frequency and direction of polarization of the electromagnetic waves, the parameter that couples the Maxwell field and the Weyl tensor, and the angle between the direction of propagation of the electromagnetic wave and the coordinate axis. The results show that this coupling model can be tested by the detection of high-frequency gravitational waves.

关键词： modified theory gravitational wave wave vector

Effect of noncircularity on the dynamic behaviors of particles in a disformal rotating black-hole spacetime

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Science China(Physics,Mechanics & Astronomy) 2022年第5期65卷 34-42页

作者： Xuan Zhou Songbai Chen jiliang jing Department of Physics Synergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal UniversityChangsha 410081China Center for Gravitation and Cosmology College of Physical Science and TechnologyYangzhou UniversityYangzhou 225009China

A disformal rotating black-hole solution is a black-hole solution in quadratic degenerate higher-order scalar-tensor *** breaks the circular condition of spacetime different from the case of the usual Kerr *** study investigated the dynamic behaviors of the motion of timelike particles in such disformal black-hole spacetime with an extra deformation *** showed that the characteristics of the particle’s motion depend on the sign of the deformation *** the positive deformation parameter,the motion is regular and *** the negative one,as the deformation parameter changes,the motion of the particles undergoes a series of transitions between the chaotic motion and the regular motion and falls into the horizon or escapes to spatial *** means that the dynamic behavior of timelike particles in the disformal Kerr black-hole spacetime with noncircularity becomes richer than that in the usual Kerr black-hole case.

关键词： disformal rotating black-hole noncircularity quadratic degenerate higher-order scalar-tensor theories chaos

Energy flux and waveforms by coalescing spinless binary system in effective one-body theory

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Science China(Physics,Mechanics & Astronomy) 2024年第6期67卷 58-68页

作者： Sheng Long Weike Deng jiliang jing Department of Physics Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of EducationSynergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal UniversityChangsha 410081China Center for Gravitation and Cosmology College of Physical Science and TechnologyYangzhou UniversityYangzhou 225009China

We present a study on the energy radiation rate and waveforms of the gravitational wave generated by coalescing spinless binary systems up to the third post-Minkowskian approximation in the effective one-body *** derive an analytical expansion of the null tetrad components of the gravitational perturbed Weyl tensorΨ4in the effective spacetime,we utilize the method proposed by Sasaki et *** this investigation,we discover more general integral formulas that provide a theoretical framework for computing the results in any ***,we successfully compute the energy radiation rate and waveforms of the gravitational wave,which include the results of the Schwarzschild case and the correction terms resulting from the dimensionless parameters a2and a3in the effective metric.

关键词： post-Minkowskian approximation effective one-body theory gravitational waveform template

Direct characteristic-function tomography of the quantum states of quantum fields

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Science China(Physics,Mechanics & Astronomy) 2023年第11期66卷 119-125页

作者： Zehua Tian jiliang jing Jiangfeng Du CAS Key Laboratory of Microscale Magnetic Resonance School of Physical SciencesUniversity of Science and Technology of ChinaHefei230026China CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei230026China Department of Physics Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Educationand Synergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal UniversityChangsha410081China Hefei National Laboratory University of Science and Technology of ChinaHefei230088China School of Physics Zhejiang UniversityHangzhou310027China

Herein,we propose a novel strategy for implementing a direct readout of the symmetric characteristic function of the quantum states of quantum fields without the involvement of idealized measurements,an aspect that has always been deemed ill-defined in quantum field *** proposed scheme relies on the quantum control and measurements of an auxiliary qubit locally coupled to the quantum *** mapping the expectation values of both the real and imaginary parts of the field displacement operator to the qubit states,the qubit's readout provides complete information regarding the symmetric characteristic *** characterize our technique by applying it to the Kubo-Martin-Schwinger(thermal)and squeezed states of a quantum scalar *** addition,we have discussed general applications of this approach to analogue-gravity systems,such as Bose-Einstein condensates,within the scope of state-of-the-art experimental *** proposed strategy may serve as an essential in understanding and optimizing the control of quantum fields for relativistic quantum information applications,particularly in exploring the interplay between gravity and quantum,for example,the relation to locality,causality,and information.

关键词： characteristic-function tomography quantum fields Ramsey interferometry analogue gravity

Entanglement dynamics in κ-deformed spacetime

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Science China(Physics,Mechanics & Astronomy) 2024年第10期67卷 33-54页

作者： Xiaobao Liu Zehua Tian jiliang jing Department of Physics and Electrical Engineering Liupanshui Normal UniversityLiupanshui 553004China School of Physics Hangzhou Normal UniversityHangzhou 311121China CAS Key Laboratory of Microscale Magnetic Resonance and School of Physical Sciences University of Science and Technology of ChinaHefei 230026China Department of Physics Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of EducationSynergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal UniversityChangsha 410081China

We treat two identical and mutually independent two-level atoms that are coupled to a quantum field as an open quantum *** master equation that governs their evolution is derived by tracing over the degree of freedom of the *** this,we compare the entanglement dynamics of the two atoms moving with different trajectories inκ-deformed and Minkowski ***,when the environment-induced interatomic interaction does not exist,the entanglement dynamics of two static atoms inκ-deformed spacetime are reduced to that in Minkowski spacetime in the case that the spacetime deformation parameterκis sufficiently large as theoretically ***,if the atoms undergo relativistic motion,regardless of whether inertial or non-inertial,their entanglement dynamics inκ-deformed spacetime behave differently from that in Minkowski spacetime even whenκis *** investigate various types of entanglement behavior,such as decay and generation,and discuss how different relativistic motions,such as uniform motion in a straight line and circular motion,amplify the differences in the entanglement dynamics between theκ-deformed and Minkowski spacetime *** addition,when the environment-induced interatomic interaction is considered,we find that it may also enhance the differences in the entanglement dynamics between these two ***,in principle,one can tell whether she/he is inκ-deformed or Minkowski spacetime by checking the entanglement behavior between two atoms in certain circumstances.

关键词： quantum entanglement -deformed spacetime relativistic motion environment-induced interatomic interaction quan-tum field theory in curved spacetime

Polarization distribution in the image of a synchrotron emitting ring around a regular black hole

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Science China(Physics,Mechanics & Astronomy) 2022年第12期65卷 97-108页

作者： Xueyao Liu Songbai Chen jiliang jing Department of Physics Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of EducationSynergetic Innovation Center for Quantum Effects and ApplicationsHunan Normal UniversityChangsha410081China Center for Gravitation and Cosmology College of Physical Science and TechnologyYangzhou UniversityYangzhou225009China

The polarized images of a synchrotron emitting ring are studied in the regular Hayward and Bardeen black hole *** regular black holes carry a magnetic field in terms of gravity coupled to nonlinear *** show that the main features of the polarization images of the emitting rings are similar in these two regular black hole *** the magnetic charge parameter increases,the polarization intensity and the electric vector position angle in the image plane increase in Hayward and Bardeen black hole ***,the polarization intensity and electric vector position angle in the image of the emitting ring in the Hayward black hole spacetime are closer to those in the Schwarzschild *** effects of the magnetic charge parameter on the Strokes Q-U loops are also slightly smaller in the Hayward black hole *** information stored in the polarization images around Hayward and Bardeen black holes could help understand regular black holes and the gravity coupled to nonlinear electrodynamics.

关键词： black hole image regular black hole polarization distribution synchrotron emitting ring

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Selected spherical photon orbits around a deformed Kerr black hole

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Science China(Physics,Mechanics & Astronomy) 2019年第1期62卷 16-26页

作者： ChangQing Liu ChiKun Ding jiliang jing Department of Physics Hunan University of Humanities Science and Technology Department of Physics Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of EducationHunan Normal University

In this paper, we investigate the so-called spherical photon orbits around a deformed Kerr black hole with an extra deformation parameter. The change in the azimuth ?φ and the angle of dragging of nodes per revolution ?? of a complete latitudinal oscillated orbit is calculated analytically. Finally, representative six examples orbits are plotted out to illustrate how spherical photon orbits look like and exhibit some interesting behavior. Especially, these spherical photon orbits are absent in circular orbits and different from the Kerr case.

关键词： spherical photon orbits Hamiltonian formulation periodic latitudinal oscillation

Quasinormal modes and late time tails of perturbation fields on a Schwarzschild-like black hole with a global monopole in the Einstein-bumblebee theory

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Science China(Physics,Mechanics & Astronomy) 2023年第10期66卷 33-43页

作者： Xiaolin Zhang Mengjie Wang jiliang jing School of Physics and Electronics Synergetic Innovation Center for Quantum Effects and Applicationsand Institute of Interdisciplinary StudiesHunan Normal UniversityChangsha 410081China

In this paper we complete a systematic study on quasinormal modes(QNMs) and late time tails for scalar,Dirac and Maxwell fields on a spherically symmetric Schwarzschild-like black hole with a global monopole in the Einstein-bumblebee *** look for QNMs,we solve the equations of motion for all perturbation fields considered herein numerically,by employing both the matrix and the WKB methods,and find good agreements for numeric data obtained by these two techniques in the regime when both are *** impact of the bumblebee parameter c,the monopole parameter η^(2),and the multipole number l on the fundamental quasinormal frequency are analyzed in *** results are shown in terms of the quasinormal frequency measured by √1+c M ,where M is a black hole mass *** observe,by increasing the parameter c(η^(2)) with fixed first few l,that the real part of QNMs increases for all spin fields;while the magnitude of the imaginary part decreases for scalar and Dirac fields but increases for Maxwell *** increasing the multipole numberlwith fixed other parameters,we disclose that the real part of QNMs for all spin fields increases while the magnitude of the imaginary part decreases for scalar and Dirac fields but increases for Maxwell *** the eikonal limit(l>>n),QNMs for all spin fields coincide with each other and the real part scale linearly with *** particular,the asymptotic QNMs approach the corresponding results given by the first order WKB formula,and only the real part of QNMs is dependent on the bumblebee and monopole *** addition,it is shown that the late time behavior is determined not only by the multipole number but also by the bumblebee and monopole parameters,and is distinct for bosonic and fermonic ***,the presence of the bumblebee(monopole) field makes the spin fields decay *** results indicate,both in the context of QNMs and late time tails,that the bumblebee field and the monopole field play the same ro

关键词： Einstein-bumblebee theory perturbation fields dynamic evolution