from
by
Christian Adamcewicz, Paul D. Lasky, Eric Thrane
Fri Nov 10 2023 11:42:01 (23 hours)
# 1.
Theoretical studies of angular momentum transport suggest that isolated stellar-mass black holes are born with negligible dimensionless spin magnitudes $\chi \lesssim 0.01$. However, recent gravitational-wave observations indicate $\gtrsim 15\%$ of binary black hole systems contain at least one black hole with a non-negligible spin magnitude. One explanation is that the first-born black hole spins up the stellar core of what will become the second-born black hole through tidal interactions. Typically, the second-born black hole is the “secondary” (less-massive) black hole, though, it may become the “primary” (more-massive) black hole through a process known as mass-ratio reversal. We investigate this hypothesis by analysing data from the third gravitational-wave transient catalog (GWTC-3) using a “single-spin” framework in which only one black hole may spin in any given binary. Given this assumption, we show that at least $28\%$ (90% credibility) of the LIGO–Virgo–KAGRA binaries contain a primary with significant spin, possibly indicative of mass-ratio reversal. We find no evidence for binaries that contain a secondary with significant spin. However, the single-spin framework is moderately disfavoured (natural log Bayes factor $\ln {\cal B} = 3.1$) when compared to a model that allows both black holes to spin. If future studies can firmly establish that most merging binaries contain two spinning black holes, it may call into question our understanding of formation mechanisms for binary black holes or the efficiency of angular momentum transport in black hole progenitors.
Send To > Keep unreadDelete
from
by
Suddhasattwa Brahma, Abhinove Nagarajan Seenivasan
Fri Nov 10 2023 11:41:53 (23 hours)
# 2.
If gravity is fundamentally quantum, any two quantum particles must get entangled with each other due to their mutual interaction through gravity. This phenomenon, dubbed gravity-mediated entanglement, has led to recent efforts of detecting perturbative quantum gravity in table-top experimental setups. In this paper, we generalize this to imagine two idealized massive oscillators, in their ground state, which get entangled due to gravity in an expanding universe, and find that the curvature of the background spacetime leaves its imprints on the resulting entanglement profile. Thus, detecting gravity-mediated entanglement from cosmological observations will open up an exciting new avenue of measuring the local expansion rate of the cosmos.
Send To > Keep unreadDelete
from
Fri Nov 10 2023 10:55:34 (1 day)
# 3.
C. Barbado, Luis and Del Santo, Flavio (2023) On playing gods: The fallacy of the many-worlds interpretation. [Preprint]
Send To > Keep unreadDelete
from
Fri Nov 10 2023 10:49:22 (1 day)
# 4.
Drezet, aurélien (2023) Local causality in the works of Einstein, Bohm and Bell. [Preprint]
Send To > Keep unreadDelete
from
Fri Nov 10 2023 10:46:58 (1 day)
# 5.
Weinstein, Galina (2023) Was Einstein a Lone Genius? [Preprint]
Send To > Keep unreadDelete
from
by
Ryan Wilkinson
Thu Nov 09 2023 18:00:00 (1 day)
# 6.
Author(s): Ryan Wilkinson
The resolution of a major discrepancy between theory and experiment for strontium atomic clocks could help improve the precision of these timekeepers.
[Physics 16, s160] Published Thu Nov 09, 2023
Send To > Keep unreadDelete
from
by
Andrés F. Ducuara, Paul Skrzypczyk, Francesco Buscemi, Peter Sidajaya, and Valerio Scarani
Thu Nov 09 2023 18:00:00 (1 day)
# 7.
Author(s): Andrés F. Ducuara, Paul Skrzypczyk, Francesco Buscemi, Peter Sidajaya, and Valerio Scarani
The interplay between thermodynamics and information theory has a long history, but its quantitative manifestations are still being explored. We import tools from expected utility theory from economics into stochastic thermodynamics. We prove that, in a process obeying Crooks’s fluctuation relations…
[Phys. Rev. Lett. 131, 197103] Published Thu Nov 09, 2023
Send To > Keep unreadDelete
from
by
P. Chandra
Thu Nov 09 2023 08:00:00 (2 days)
# 8.
Nature Physics, Published online: 09 November 2023; doi:10.1038/s41567-023-02191-4
Kenneth Wilson worked on the renormalization group during the Cold War, when communication between scientists in the Soviet Union and in the West was restricted. Nevertheless, Soviet physicists had a strong influence on Wilson’s work.
Send To > Keep unreadDelete
from
Thu Nov 09 2023 08:00:00 (2 days)
# 9.
Nature Physics, Published online: 09 November 2023; doi:10.1038/s41567-023-02300-3
It has been around fifty years since Kenneth Wilson’s work on the renormalization group. Nature Physics celebrates this anniversary with a collection of Comments on its development and applications.
Send To > Keep unreadDelete
from
by
Stefanie Reichert
Thu Nov 09 2023 08:00:00 (2 days)
# 10.
Nature Physics, Published online: 09 November 2023; doi:10.1038/s41567-023-02292-0
Gravity is attractive
Send To > Keep unreadDelete
from
by
Richard Brierley
Thu Nov 09 2023 08:00:00 (2 days)
# 11.
Nature Physics, Published online: 09 November 2023; doi:10.1038/s41567-023-02287-x
The gravity of quantum thermalization
Send To > Keep unreadDelete
from
Thu Nov 09 2023 07:38:18 (2 days)
# 12.
Arsiwalla, Xerxes and Elshatlawy, Hatem and Rickles, Dean (2023) Pregeometry, Formal Language and Constructivist Foundations of Physics. [Preprint]
Send To > Keep unreadDelete
from
by
Robert B. Griffiths
Wed Nov 08 2023 18:00:00 (2 days)
# 13.
Author(s): Robert B. Griffiths
This is a response to comments and criticisms found in the preceding Comment [Phys. Rev. A 108, 056201 (2023)] by Vaidman on the paper in Phys. Rev. A 107, 062219 (2023).
[Phys. Rev. A 108, 056202] Published Wed Nov 08, 2023
Send To > Keep unreadDelete
from
by
Lev Vaidman
Wed Nov 08 2023 18:00:00 (2 days)
# 14.
Author(s): Lev Vaidman
In a recent paper, Griffiths [Phys. Rev. A 107, 062219 (2023)] analyzed a protocol for transmission of information between two parties introduced by Salih et al. [Phys. Rev. Lett. 110, 170502 (2013)]. There is a considerable controversy about the counterfactuality of this protocol, and Griffiths sug…
[Phys. Rev. A 108, 056201] Published Wed Nov 08, 2023
Send To > Keep unreadDelete
from
Wed Nov 08 2023 13:02:14 (2 days)
# 15.
Fraser, Doreen and Papageorgiou, Maria (2023) Note on episodes in the history of modeling measurements in local spacetime regions using QFT. [Preprint]
Send To > Keep unreadDelete
from
Wed Nov 08 2023 13:01:37 (2 days)
# 16.
Fortin, Sebastian and Jaimes Arriaga, Jesús Alberto (2018) About the nature of the wave function and its dimensionality: the case of quantum chemistry. [Preprint]
Send To > Keep unreadDelete
from
Wed Nov 08 2023 13:00:44 (2 days)
# 17.
Gao, Shan (2023) Can the ontology of Bohmian mechanics consists only in particles? The PBR theorem says no.
Send To > Keep unreadDelete
from
by
Flavio Del Santo, Nicolas Gisin
Wed Nov 08 2023 11:11:28 (3 days)
# 18.
We propose an interpretation of physics named potentiality realism. This view, which can be applied to classical as well as to quantum physics, regards potentialities (i.e. intrinsic, objective propensities for individual events to obtain) as elements of reality, thereby complementing the actual properties taken by physical variables. This allows one to naturally reconcile realism and fundamental indeterminism in any theoretical framework. We discuss our specific interpretation of propensities, that require them to depart from being probabilities at the formal level, though allowing for statistics and the law of large numbers. This view helps reconcile classical and quantum physics by showing that most of the conceptual problems that are customarily taken to be unique issues of the latter — such as the measurement problem — are actually in common to all indeterministic physical theories.
Send To > Keep unreadDelete
from
Tue Nov 07 2023 04:57:13 (4 days)
# 19.
Guo, Bixin (2020) Two Approaches to Reduction: A Case Study from Statistical Mechanics. [Preprint]
Send To > Keep unreadDelete
from
by
Scott A. Walter
Mon Nov 06 2023 11:01:33 (5 days)
# 20.
In the early 1880s, Henri Poincar\’e discovered a new equilibrium figure for uniformly-rotating fluid masses — the pear, or piriform figure — and speculated that in certain circumstances the pear splits into two unequal parts, and provides thereby a model for the origin of binary stars. The contemporary emergence of photometric and spectroscopic studies of variable stars fueled the first models of eclipsing binaries, and provided empirical support for a realist view of equilibrium figures — including the pear — in the cosmic realm. The paper reviews astrophysical interpretation of the Poincar\’e pear and the Poincar\’e-Darwin fission hypothesis with respect to research on variable stars from 1885 to 1901.
Send To > Keep unreadDelete
from
Sun Nov 05 2023 15:59:24 (5 days)
# 21.
Krátký, Matěj and Read, James (2023) On functional freedom and Penrose’s critiques of string theory. [Preprint]
