Article
Astronomy & Astrophysics
Quentin Henry, Mohammed Khalil
Summary: This paper investigates the waveform modes and energy flux of an eccentric binary of spinning nonprecessing compact objects. The novel results include the contributions of instantaneous spin-orbit and spin spin effects, as well as the hereditary contributions for eccentric orbits.
Article
Astronomy & Astrophysics
Donato Bini, Andrea Geralico, Piero Rettegno
Summary: This paper computes the leading order contribution to radiative losses in spinning binaries with aligned spins. Consistency checks were performed with existing post-Newtonian-based and post-Minkowskian-based results, and agreement was found. The exact expressions of the radiative losses in terms of orbital elements were obtained, even at the leading post-Newtonian order.
Article
Astronomy & Astrophysics
Antoni Ramos-Buades, Alessandra Buonanno, Mohammed Khalil, Serguei Ossokine
Summary: This study presents a new gravitational-wave model for binary black holes with rotating spins. The model accurately reproduces eccentric gravitational waves and demonstrates good consistency when compared with numerical simulations and observational data.
Article
Astronomy & Astrophysics
Alessandro Nagar, Piero Rettegno
Summary: The study evaluates the performance of an updated EOB model for spin-aligned black hole binaries, showing that the model generally has unfaithfulness below 1% compared to numerical relativity simulations, with larger discrepancies in the high-spin region of the parameter space.
Article
Astronomy & Astrophysics
Jakob Stegmann, Fabio Antonini
Summary: Close stellar binaries are likely to experience stable mass transfer, causing the donor star to lose mass to its companion. Mass transfer can result in the donor star's spin flipping onto the orbital plane of the binary, potentially dominating over tidal synchronization effects, especially in certain mass ranges of main-sequence stars.
Article
Materials Science, Multidisciplinary
Axel Hoffmann
Summary: Spintronics is a rapidly developing research field that involves complex concepts such as spin-orbit interactions, magnetic materials, and spin currents. This article presents several examples to illustrate the complexities that can be encountered in these systems and highlights the contributions of Chia-Ling Chien and his research group in the forefront of spintronics research.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Astronomy & Astrophysics
Alessandro Nagar, Alice Bonino, Piero Rettegno
Summary: The study introduces an improved EOB model for black hole binaries with different orbital configurations, accurately informed by numerical relativity simulations, with fidelity within 1% over a significant portion of the simulations. The model can reliably handle eccentric orbits and higher multipoles, as well as hyperbolic-like configurations in excellent agreement with NR results.
Article
Astronomy & Astrophysics
Quentin Henry, Sylvain Marsat, Mohammed Khalil
Summary: We studied the spin contributions to the gravitational waveforms emitted by inspiraling compact binaries in the case of quasicircular, equatorial orbits. We extended previous works by computing the full waveform decomposed in spin-weighted spherical harmonics, which requires the computation of multipolar moments of higher multipolar order and other nonlinear interactions between moments. Our results provide new insights for effective-one-body waveform models and correct the terms in current models.
Article
Physics, Multidisciplinary
E. Mornacchi, S. Rodini, B. Pasquini, P. Pedroni
Summary: By simultaneously extracting the six leading-order proton polarizabilities, we have set a milestone in the field. This achievement was made possible by new high-quality experimental data and an innovative fitting method based on bootstrapping. These results now serve as a fundamental benchmark for all future theoretical and experimental polarizability estimates.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
M. Umar Farooq, Lede Xian, Li Huang
Summary: This study systematically investigates the interplay between Dresselhaus spin-orbit coupling (DSOC) and Rashba spin-orbit coupling (RSOC) and their effects on spin Hall effect (SHE) in monoand bilayer InSe. The introduction of Rashba interaction in monolayer InSe increases Zeeman-like spin splitting and enhances spin Hall conductivity (SHC), while the SHC in the unperturbed centrosymmetric AB stacked bilayer stays insignificant in a wide energy range. On the other hand, the AB' stacked bilayer with intrinsic RSOC shows comparable SHC to the AB stacked bilayer with an external electric field, and the spin-momentum locking in the AB' stacked bilayer is switchable by a gate voltage.
Article
Astronomy & Astrophysics
Mohammed Khalil, Alessandra Buonanno, Jan Steinhoff, Justin Vines
Summary: The article introduces a new eccentric waveform model for accurately modeling compact binaries, incorporating eccentricity effects and spin effects.
Article
Nanoscience & Nanotechnology
N. S. Maslova, P. I. Arseyev, I. M. Sokolov, V. N. Mantsevich
Summary: A protocol for entanglement formation between electronic spins in the system of interacting quantum dots and circular polarized cavity photons was proposed. The entangled states are formed due to the spin-orbit interaction in the system consisting of two different types of diamond-like spatially arranged quantum dots resonantly interacting with left and right circular polarized cavity fields. The time evolution of entanglement degree (concurrence) in the presence of interaction with fermionic reservoir and cavity leakage was obtained.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2023)
Article
Astronomy & Astrophysics
Simon Stevenson
Summary: More than 50 binary black hole mergers have been observed by the LIGO and Virgo gravitational-wave observatories. Recent analysis suggests that large black hole kicks are needed to explain the spin distribution of merging binary black holes, but this view may have biased estimates. It is more likely that the majority of binary black holes form through isolated binary evolution.
ASTROPHYSICAL JOURNAL LETTERS
(2022)
Article
Astronomy & Astrophysics
Thomas M. Tauris
Summary: The detection of double black hole mergers provides insights into their physical properties and origin. The observed distribution of effective inspiral spins of the black holes contradicts theoretical predictions, but can be explained if the black hole spin axis is tossed during their formation process, similar to newborn neutron stars.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Caleb Canas, Suvrath Mahadevan, Chad F. Bender, Noah Isaac Salazar Rivera, Andrew Monson, Corey Beard, Jack Lubin, Paul Robertson, Arvind F. Gupta, William D. Cochran, Connor Fredrick, Fred Hearty, Sinclaire Jones, Shubham Kanodia, Andrea S. J. Lin, Joe P. Ninan, Lawrence W. Ramsey, Christian Schwab, Gudmundur Stefansson
Summary: A brown dwarf with M = 67 +/- 2M (J) was discovered in an eccentric orbit around the early M dwarf TOI-2119 with an orbital period of 7.200861 +/- 0.000005 days. The confirmation of its nature was made using a combination of ground-based and space-based observations. The system shows potential for probing formation scenarios and additional companions.
ASTRONOMICAL JOURNAL
(2022)
