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European Physical Journal C: Particles and FieldsUsing effective field theory methods, we derive the Carrollian analog of the geodesic action. We find that it contains both “electric” and “magnetic” contributions that are in general coupled to each other.
Luca Ciambelli, Daniel Grumiller
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On the trajectories of null and timelike geodesics in different wormhole geometries
European Physical Journal C: Particles and Fields, 2018 The paper deals with an extensive study of null and timelike geodesics in the background of wormhole geometries. Starting with a spherically symmetric spacetime, null geodesics are analyzed for the Morris–Thorne wormhole (WH) and photon spheres are ...
Anuj Mishra, Subenoy Chakraborty
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Lyapunov exponent, ISCO and Kolmogorov–Senai entropy for Kerr–Kiselev black hole
European Physical Journal C: Particles and Fields, 2021 Geodesic motion has significant characteristics of space-time. We calculate the principle Lyapunov exponent (LE), which is the inverse of the instability timescale associated with this geodesics and Kolmogorov–Senai (KS) entropy for our rotating Kerr ...
Monimala Mondal +2 more
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Quasinormal modes of black holes with multiple photon spheres
Journal of High Energy Physics, 2022 For a static and spherically symmetric black hole, a photon sphere is composed of circular null geodesics of fixed radius, and plays an important role in observing the black hole.
Guangzhou Guo +3 more
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The forces and Penrose process in Friedman spacetime
Physics of Complex Systems, 2021 In this paper, we compare the force expressions in both comoving synchronous and Ellis coordinate systems in Friedman-Robertson-Walker spacetime in order to understand how the coordinate transformation affects the inertial forces.
Андрей Анатольевич Гриб +1 more
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Geodesics for the Painlevé–Gullstrand Form of Lense–Thirring Spacetime
Universe, 2022 Recently, the current authors have formulated and extensively explored a rather novel Painlevé–Gullstrand variant of the slow-rotation Lense–Thirring spacetime, a variant which has particularly elegant features—including unit lapse, intrinsically flat ...
Joshua Baines +3 more
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Frontiers in Human Neuroscience, 2016 In pain management as well as other clinical applications of neuromodulation, it is important to consider the timing parameters influencing activity-dependent plasticity, including pulsed versus sustained currents, as well as the spatial action of ...
Phan Luu +8 more
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European Physical Journal C: Particles and Fields, 2023 The existence of null circular geodesics in the background of non-extremal spherically symmetric asymptotically flat black holes has been proved in previous works.
Yan Peng
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Methods for Examining Electrophysiological Coherence in Epileptic Networks
Frontiers in Neurology, 2013 Epilepsy may reflect a focal abnormality of cerebral tissue, but the generation of seizures typically involves propagation of abnormal activity through cerebral networks.
Jasmine eSong +8 more
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Learning and the Development of Contexts for Action
Frontiers in Human Neuroscience, 2011 Neurophysiological evidence from animal studies suggests that frontal corticolimbic systems support early stages of learning, whereas later stages involve context representation formed in hippocampus and posterior cingulate cortex.
Phan eLuu +7 more
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