Gravitational wave memory in wormhole spacetimes

Chakraborty, Ipsita; Bhattacharya, Soumya; Chakraborty, Sumanta

doi:10.1103/physrevd.106.104057

Cited by 4 publications

(5 citation statements)

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“…A recent simultaneous R-matrix fit of 4 He+ 4 He elastic scattering differential cross sections and phase shifts, and of 4 He(α, γ ) 8 Be radiative capture cross section (for the 4 + → 2 + transition) around the 4 + resonance at 11.4 MeV, redetermined some properties of the low-lying states in 8 Be [373]. In particular, the obtained α values for the ground state and the 4 + state are lower than the commonly accepted values in the literature, while the reduced E2 transition strength (21.96 ± 3.86e 2 f m 4 ) is in agreement with the value obtained experimentally, and confirms the large deformation of 8 Be.…”

Section: Clustering In 8 Bementioning

confidence: 99%

Clusters in light nuclei: history and recent developments

Lombardo,

Dell’Aquila

2023

Riv. Nuovo Cim.

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In this review, we discuss recent advancements in the study of clustering phenomena occurring in light nuclei, and their influence on nuclear structure, dynamics, and astrophysics. In the introduction, we outline the historical steps leading to the concept of $$\alpha $$ α -clusterization in nuclei and provide a comprehensive description of the evolution of nuclear models capable to describe clustering aspects in nuclear systems and of the main experiments and discoveries leading to the development of this research field. We also describe some spectroscopic techniques that are used to establish the clustered nature of a given nuclear state. Some relevant experimental and theoretical findings recently reported both in experimental and theoretical works are discussed in the text. We put emphasis on recent achievements and remaining problems in the description of the structure of light isotopes, from helium to neon, including both self- and non-self-conjugate nuclei. Particular attention to the implication in the nuclear astrophysics context and to clustering effects in the dynamics of nuclear reactions is pursued all along the review.

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Section: Clustering In 8 Bementioning

confidence: 99%

Clusters in light nuclei: history and recent developments

Lombardo,

Dell’Aquila

2023

Riv. Nuovo Cim.

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“…Earlier wavelet theorem had been applied to analyze the phenomena of vibrational spectral diffusion in water, [95,100,101] ionic solutions, [102,92] and aqueous solutions of neutral molecules. [103][104][105][106][107] In the previously reported studies, the wavelet was the chosen method for frequency calculations, and it could efficiently reproduce the experimental results with a significant amount of accuracy. Wavelet-based frequency calculations are reliable and fast and can be applied to interfaces, [108] confined water, [109] and aqueous solutions of peptides and polypeptides.…”

Section: Computational Detailsmentioning

confidence: 99%

“…Time‐series wavelet method has been used to extract the instantaneous frequency of a specific probe through Fourier transform [99] of the time domain data at each timeframe. Earlier wavelet theorem had been applied to analyze the phenomena of vibrational spectral diffusion in water, [95,100,101] ionic solutions, [102,92] and aqueous solutions of neutral molecules [103–107] . In the previously reported studies, the wavelet was the chosen method for frequency calculations, and it could efficiently reproduce the experimental results with a significant amount of accuracy.…”

Section: Computational Detailsmentioning

confidence: 99%

Multiple Ensembles of the Hydrogen‐bonded Network in Ethylammonium Nitrate versus Water from Vibrational Spectral Dynamics of SCN⁻ Probe

Biswas

Mallik

2022

ChemPhysChem

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We performed classical molecular dynamics simulations to monitor the structural interactions and ultrafast dynamical and spectral response in the protic ionic liquid, ethylammonium nitrate (EAN) and water using the nitrile stretching mode of thiocyanate ion (SCN À ) as the vibrational probe. The normalized frequency distribution of the nitrile stretch in SCN À attains an asymmetric shape in EAN, indicating the existence of more than one hydrogen-bonding environment in EAN. Further, we computed the 2D IR spectrum from classical trajectories, applying the response function formalism. Spectral diffusion dynamics in EAN undergo an initial rattling of the SCN À inside the local ion-cage occurring at a timescale of 0.10 ps, followed by the breakup of the ion-cage activating molecular diffusion at 7.86 ps timescale. In contrast, the dynamics of structural reorganization occur at a timescale of 0.58 ps in H 2 O. Hence, the time dependence of the frequency-frequency correlation function decay hints at the local molecular structure and ultrafast ion dynamics of the SCN À probe. The loss of frequency correlation read from the peak shape changes in the 2D correlation spectrum as a function of waiting time is faster in H 2 O than in EAN due to the enhanced structural ordering and higher viscosity of the latter. We provide an atomic-level interpretation of the solvation environment around SCN À in EAN and water, which indicates multiple ensembles of the hydrogen bond network in EAN.

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“…These charges are defined based on the known second order and novel third order dressed Bondi aspects, considering interactions involving mass monopole-quadrupole and quadrupole-quadrupole. The investigation of the GW memory is conducted within the framework of a specific category of braneworld wormholes, which possess a unique characteristic of not requiring any exotic matter fields for their traversability as mentioned in [40]. The memory effect, which signifies the imprint of the presence of extra dimensions and the wormhole nature of the spacetime geometry, is discussed in [40].…”

Section: Introductionmentioning

confidence: 99%

“…The investigation of the GW memory is conducted within the framework of a specific category of braneworld wormholes, which possess a unique characteristic of not requiring any exotic matter fields for their traversability as mentioned in [40]. The memory effect, which signifies the imprint of the presence of extra dimensions and the wormhole nature of the spacetime geometry, is discussed in [40]. Furthermore, it has been suggested in [41,42] that the charges associated with the internal Lorentz symmetries of general relativity, along with the inclusion of higher derivative boundary terms in the action, can capture observable GW effects.…”

Section: Introductionmentioning

confidence: 99%

Gravitational wave pulse and memory effects for hairy Kiselev black hole and its analogy with Bondi–Sachs formalism

Hadi,

Rezaei Akbarieh,

Mota

2024

Class. Quantum Grav.

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The investigation of non-vacuum cosmological backgrounds containing black holes is greatlyenhanced by the Kiselev solution. This solution plays a crucial role in understanding the properties of the background and its relationship with the features of the black hole. Consequently,the gravitational memory effects at large distances from the black hole offer a valuable meansof obtaining information about the surrounding field parameter N and parameters related tothe hair of the hairy Kiselev Black hole. This paper investigates the gravitational memoryeffects in the context of the Kiselev solution through two distinct approaches. At first, thegravitational memory effect at null infinity is explored by utilizing the Bondi-Sachs formalismby introducing a gravitational wave (GW) pulse to the solution. The resulting Bondi mass isthen analyzed to gain further insight. Therefore, the Kiselev solution is being examined todetermine the variations in Bondi mass caused by the pulse of GWs. The study of changes inBondi mass is motivated by the fact that it is dynamic and time-dependent, and it measuresmass on an asymptotically null slice or the densities of energy on celestial spheres. In thesecond approach, the investigation of displacement and velocity memory effects is undertakenin relation to the deviation of two neighboring geodesics and the deviation of their derivative influenced by surrounding field parameter N and the hair of hairy Kiselev black hole.This analysis is conducted within the context of a gravitational wave pulse present in thebackground of a hairy Kiselev black hole surrounded by a field paramete

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Gravitational wave memory in wormhole spacetimes

Cited by 4 publications

References 82 publications

Clusters in light nuclei: history and recent developments

Clusters in light nuclei: history and recent developments

Multiple Ensembles of the Hydrogen‐bonded Network in Ethylammonium Nitrate versus Water from Vibrational Spectral Dynamics of SCN⁻ Probe

Gravitational wave pulse and memory effects for hairy Kiselev black hole and its analogy with Bondi–Sachs formalism

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Gravitational wave memory in wormhole spacetimes

Cited by 4 publications

References 82 publications

Clusters in light nuclei: history and recent developments

Clusters in light nuclei: history and recent developments

Multiple Ensembles of the Hydrogen‐bonded Network in Ethylammonium Nitrate versus Water from Vibrational Spectral Dynamics of SCN− Probe

Gravitational wave pulse and memory effects for hairy Kiselev black hole and its analogy with Bondi–Sachs formalism

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Multiple Ensembles of the Hydrogen‐bonded Network in Ethylammonium Nitrate versus Water from Vibrational Spectral Dynamics of SCN⁻ Probe