bluuebunny/crossref_metadata_2025_split huggingface dataset:
Classical gravitational self-energy from double copy
Authors: Almeida Gabriel Luz , Foffa Stefano , Sturani Riccardo 
Published: December 2020

Abstract
We apply the classical double copy to the calculation of self-energy of composite systems with multipolar coupling to gravitational field, obtaining next-to-leading order results in the gravitational coupling GN by generalizing color to kinematics replacement rules known in literature. When applied to the multipolar description of the two-body system, the self-energy diagrams studied in this work correspond to tail processes, whose physical interpretation is of radiation being emitted by the non-relativistic source, scattered by the curvature generated by the binary system and then re-absorbed by the same source. These processes contribute to the conservative two-body dynamics and the present work represents a decisive step towards the systematic use of double copy within the multipolar post-Minkowskian expansion.
Knitting wormholes by entanglement in supergravity
Authors: Balasubramanian Vijay , DeCross Matthew , Sárosi Gábor 
Published: December 2020

Abstract
We construct a single-boundary wormhole geometry in type IIB supergravity by perturbing two stacks of N extremal D3-branes in the decoupling limit. The solution interpolates from a two-sided planar AdS-Schwarzschild geometry in the interior, through a harmonic two-center solution in the intermediate region, to an asymptotic AdS space. The construction involves a CPT twist in the gluing of the wormhole to the exterior throats that gives a global monodromy to some coordinates, while preserving orientability. The geometry has a dual interpretation in $$ \mathcal{N} $$
N
= 4 SU(2N) Super Yang-Mills theory in terms of a Higgsed SU(2N) → S(U(N) × U(N)) theory in which $$ \mathcal{O} $$
O
(N2) degrees of freedom in each SU(N) sector are entangled in an approximate thermofield double state at a temperature much colder than the Higgs scale. We argue that the solution can be made long-lived by appropriate choice of parameters, and comment on mechanisms for generating traversability. We also describe a construction of a double wormhole between two universes.
Fermi seas from Bose condensates in Chern-Simons matter theories and a bosonic exclusion principle
Authors: Minwalla Shiraz , Mishra Amiya , Prabhakar Naveen 
Published: December 2020

Abstract
We generalize previously obtained results for the (all orders in the ’t Hooft coupling) thermal free energy of bosonic and fermionic large N Chern-Simons theories with fundamental matter, to values of the chemical potential larger than quasiparticle thermal masses. Building on an analysis by Geracie, Goykhman and Son, we present a simple explicit formula for the occupation number for a quasiparticle state of any given energy and charge as a function of the temperature and chemical potential. This formula is a generalization to finite ’t Hooft coupling of the famous occupation number formula of Bose-Einstein statistics, and implies an exclusion principle for Chern-Simons coupled bosons: the total number of bosons occupying any particular state cannot exceed the Chern-Simons level. Specializing our results to zero temperature we construct the phase diagrams of these theories as a function of chemical potential and the UV parameters. At large enough chemical potential, all the bosonic theories we study transit into a compressible Bose condensed phase in which the runaway instability of free Bose condensates is stabilized by the bosonic exclusion principle. This novel Bose condensate is dual to — and reproduces the thermodynamics of — the fermionic Fermi sea.
5-dimensional space-periodic solutions of the static vacuum Einstein equations
Authors: Khuri Marcus , Weinstein Gilbert , Yamada Sumio 
Published: December 2020

Abstract
An affirmative answer is given to a conjecture of Myers concerning the existence of 5-dimensional regular static vacuum solutions that balance an infinite number of black holes, which have Kasner asymptotics. A variety of examples are constructed, having different combinations of ring S1 × S2 and sphere S3 cross-sectional horizon topologies. Furthermore, we show the existence of 5-dimensional vacuum solitons with Kasner asymptotics. These are regular static space-periodic vacuum spacetimes devoid of black holes. Consequently, we also obtain new examples of complete Riemannian manifolds of nonnegative Ricci curvature in dimension 4, and zero Ricci curvature in dimension 5, having arbitrarily large as well as infinite second Betti number.
A simple quantum test for smooth horizons
Authors: Papadodimas Kyriakos , Raju Suvrat , Shrivastava Pushkal 
Published: December 2020

Abstract
We develop a new test that provides a necessary condition for a quantum state to be smooth in the vicinity of a null surface: “near-horizon modes” that can be defined locally near any patch of the null surface must be correctly entangled with each other and with their counterparts across the surface. This test is considerably simpler to implement than a full computation of the renormalized stress-energy tensor. We apply this test to Reissner-Nordström black holes in asymptotically anti-de Sitter space and provide numerical evidence that the inner horizon of such black holes is singular in the Hartle-Hawking state. We then consider BTZ black holes, where we show that our criterion for smoothness is satisfied as one approaches the inner horizon from outside. This results from a remarkable conspiracy between the properties of mode-functions outside the outer horizon and between the inner and outer horizon. Moreover, we consider the extension of spacetime across the inner horizon of BTZ black holes and show that it is possible to define modes behind the inner horizon that are correctly entangled with modes in front of the inner horizon. Although this provides additional suggestions for the failure of strong cosmic censorship, we lay out several puzzles that must be resolved before concluding that the inner horizon will be traversable.
Twin Higgs with exact Z2
Authors: Csáki Csaba , Guan Cong-Sen , Ma Teng , Shu Jing 
Published: December 2020

Abstract
We present a novel mechanism for realistic electroweak symmetry breaking in Twin Higgs/neutral naturalness models where the Z2 exchange symmetry can remain exactly unbroken. The exchange symmetry in the Yukawa sector will be implemented as an “N-trigonometric parity” $$ \sin N\frac{h}{f}\leftrightarrow \cos N\frac{h}{f} $$
sin
N

h
f

↔
cos
N

h
f

. The Yukawa couplings will be suppressed leading to an N-suppressed Higgs quadratic term, without significantly affecting the quartic. We present a concrete implementation of this idea for general (odd) values of N using maximal symmetry, and a realistic benchmark model for N = 3. We find that the tuning in the resulting Higgs potential is negligible, and also show that two-loop N-suppression violating gauge contributions can be sufficiently small. The Higgs potential and its couplings in top sector are different from other neutral naturalness models, which are the main predictions of our model and can be tested in colliders.
New 2d $$ \mathcal{N} $$ = (0, 2) dualities from four dimensions
Authors: Sacchi Matteo 
Published: December 2020

Abstract
We propose some new infra-red dualities for 2d$$ \mathcal{N} $$
N
= (0, 2) theories. The first one relates a USp(2N) gauge theory with one antisymmetric chiral, four fundamental chirals and N Fermi singlets to a Landau-Ginzburg model of N Fermi and 6N chiral fields with cubic interactions. The second one relates SU(2) linear quiver gauge theories of arbitrary length N − 1 with the addition of N Fermi singlets for any non-negative integer N. They can be understood as a generalization of the duality between an SU(2) gauge theory with four fundamental chirals and a Landau-Ginzburg model of one Fermi and six chirals with a cubic interaction. We derive these dualities from already known 4d$$ \mathcal{N} $$
N
= 1 dualities by compactifications on $$ {\mathbbm{S}}^2 $$

S
2

with suitable topological twists and we further test them by matching anomalies and elliptic genera. We also show how to derive them by iterative applications of some more fundamental dualities, in analogy with similar derivations for parent dualities in three and four dimensions.
Quantum simulation of quantum field theories as quantum chemistry
Authors: Liu Junyu , Xin Yuan 
Published: December 2020

Abstract
Conformal truncation is a powerful numerical method for solving generic strongly-coupled quantum field theories based on purely field-theoretic technics without introducing lattice regularization. We discuss possible speedups for performing those computations using quantum devices, with the help of near-term and future quantum algorithms. We show that this construction is very similar to quantum simulation problems appearing in quantum chemistry (which are widely investigated in quantum information science), and the renormalization group theory provides a field theory interpretation of conformal truncation simulation. Taking two-dimensional Quantum Chromodynamics (QCD) as an example, we give various explicit calculations of variational and digital quantum simulations in the level of theories, classical trials, or quantum simulators from IBM, including adiabatic state preparation, variational quantum eigensolver, imaginary time evolution, and quantum Lanczos algorithm. Our work shows that quantum computation could not only help us understand fundamental physics in the lattice approximation, but also simulate quantum field theory methods directly, which are widely used in particle and nuclear physics, sharpening the statement of the quantum Church-Turing Thesis.
B anomalies under the lens of electroweak precision
Authors: Alasfar Lina , Azatov Aleksandr , de Blas Jorge , Paul Ayan , Valli Mauro 
Published: December 2020

Abstract
The measurements carried out at LEP and SLC projected us into the precision era of electroweak physics. This has also been relevant in the theoretical interpretation of LHCb and Belle measurements of rare B semileptonic decays, paving the road for new physics with the inference of lepton universality violation in $$ {R}_{K^{\left(\ast \right)}} $$

R

K

∗

ratios. The simplest explanation of these flavour anomalies — sizeable one-loop contributions respecting Minimal Flavour Violation — is currently disfavoured by electroweak precision data. In this work, we discuss how to completely relieve the present tension between electroweak constraints and one-loop minimal flavour violating solutions to $$ {R}_{K^{\left(\ast \right)}} $$

R

K

∗

. We determine the correlations in the Standard Model Effective Field Theory that highlight the existence of such a possibility. Then, we consider minimal extensions of the Standard Model where our effective-field-theory picture can be realized. We discuss how these solutions to b → sℓℓ anomalies, respecting electroweak precision and without any new source of flavour violation, may point to the existence of a Z′ boson at around the TeV scale, within the discovery potential of LHC, or to leptoquark scenarios.
New boundary conditions for AdS2
Authors: Godet Victor , Marteau Charles 
Published: December 2020

Abstract
We describe new boundary conditions for AdS2 in Jackiw-Teitelboim gravity. The asymptotic symmetry group is enhanced to Diff(S1) ⋉ C∞(S1) whose breaking to SL(2, ℝ) × U(1) controls the near-AdS2 dynamics. The action reduces to a boundary term which is a generalization of the Schwarzian theory and can be interpreted as the coadjoint action of the warped Virasoro group. This theory reproduces the low-energy effective action of the complex SYK model. We compute the Euclidean path integral and derive its relation to the random matrix ensemble of Saad, Shenker and Stanford. We study the flat space version of this action, and show that the corresponding path integral also gives an ensemble average, but of a much simpler nature. We explore some applications to near-extremal black holes.
Towards a classification of rank r $$ \mathcal{N} $$ = 2 SCFTs. Part II. Special Kahler stratification of the Coulomb branch
Authors: Argyres Philip C. , Martone Mario 
Published: December 2020

Abstract
We study the stratification of the singular locus of four dimensional $$ \mathcal{N} $$
N
= 2 Coulomb branches. We present a set of self-consistency conditions on this stratification which can be used to extend the classification of scale-invariant rank 1 Coulomb branch geometries to two complex dimensions, and beyond. The calculational simplicity of the arguments presented here stems from the fact that the main ingredients needed — the rank 1 deformation patterns and the pattern of inclusions of rank 2 strata — are discrete topological data which satisfy strong self-consistency conditions through their relationship to the central charges of the SCFT. This relationship of the stratification data to the central charges is used here, but is derived and explained in a companion paper [1] by one of the authors. We illustrate the use of these conditions by re-analyzing many previously-known examples of rank 2 SCFTs, and also by finding examples of new theories. The power of these conditions stems from the fact that for Coulomb branch stratifications a conjecturally complete list of physically allowed “elementary slices” is known. By contrast, constraining the possible elementary slices of symplectic singularities relevant for Higgs branch stratifications remains an open problem.
Impact of leptonic unitarity and dark matter direct detection experiments on the NMSSM with inverse seesaw mechanism
Authors: Cao Junjie , He Yangle , Pan Yusi , Yue Yuanfang , Zhou Haijing , Zhu Pengxuan 
Published: December 2020

Abstract
In the Next-to-Minimal Supersymmetric Standard Model with the inverse seesaw mechanism to generate neutrino masses, the lightest sneutrino may act as a feasible dark matter candidate in vast parameter space. In this case, the smallness of the leptonic unitarity violation and the recent XENON-1T experiment can limit the dark matter physics. In particular, they set upper bounds of the neutrino Yukawa couplings λν and Yν. We study such effects by encoding the constraints in a likelihood function and carrying out elaborated scans over the parameter space of the theory with the Nested Sampling algorithm. We show that these constraints are complementary to each other in limiting the theory, and in some cases, they are very strict. We also study the impact of the future LZ experiment on the theory.
Tidal effects in quantum field theory
Authors: Haddad Kays , Helset Andreas 
Published: December 2020

Abstract
We apply the Hilbert series to extend the gravitational action for a scalar field to a complete, non-redundant basis of higher-dimensional operators that is quadratic in the scalars and the Weyl tensor. Such an extension of the action fully describes tidal effects arising from operators involving two powers of the curvature. As an application of this new action, we compute all spinless tidal effects at the leading post-Minkowskian order. This computation is greatly simplified by appealing to the heavy limit, where only a severely constrained set of operators can contribute classically at the one-loop level. Finally, we use this amplitude to derive the $$ \mathcal{O}\left({G}^2\right) $$
O

G
2

tidal corrections to the Hamiltonian and the scattering angle.
Holographic cosmology solutions of problems with pre-inflationary cosmology
Authors: Nastase Horatiu 
Published: December 2020

AbstractIn this paper we describe in detail how to solve the problems of pre-inflationary cosmology within the holographic cosmology model of McFadden and Skenderis [1]. The solutions of the smoothness and horizon problems, the flatness problem, the entropy and perturbation problems and the baryon asymmetry problem are shown, and the mechanisms for them complement the inflationary solutions. Most of the paper is devoted to the solution of the monopole relic problem, through a detailed calculation of 2-loop correlators of currents in a toy model which we perform inddimensions, in order to extract its leading dependence on$$ {g}_{\mathrm{eff}}^2={g}_{\mathrm{YM}}^2N/q $$geff2=gYM2N/qand find a dilution effect. Taken together with the fact that holographic cosmology gives as good a fit to CMBR as the standard paradigm of Λ CDM with inflation, it means holographic cosmology extends the inflationary paradigm into new corners, explorable only through a dual perturbative field theory in 3 dimensions.
Quantum chaos in topologically massive gravity
Authors: Liu Yan , Raju Avinash 
Published: December 2020

Abstract
We study quantum chaos of rotating BTZ black holes in Topologically Massive gravity (TMG). We discuss the relationship between chaos parameters including Lyapunov exponents and butterfly velocities from shock wave calculations of out-of-time-order correlators (OTOC) and from pole-skipping analysis. We find a partial match between pole-skipping and the OTOC results in the high temperature regime. We also find that the velocity bound puts a chaos constraint on the gravitational Chern-Simons coupling.
Global symmetries, hidden sectors and emergent (dark) vector interactions
Authors: Betzios P. , Kiritsis E. , Niarchos V. , Papadoulaki O. 
Published: December 2020

AbstractHidden theories coupled to the SM may provide emergent (dark) vectors, that are composites/bound-states of the hidden fields. This is motivated by paradigms emerging from the AdS/CFT correspondence but it is a more general phenomenon. We explore the general setup and find that UV interactions among currents or charged fields give rise to emergent vectors in the IR. We study the general properties of such vectors and argue that they can be generically different from fundamental dark photons that have been studied so far.
On the origin of long-lived particles
Authors: Barron Jared , Curtin David 
Published: December 2020

Abstract
MATHUSLA is a proposed large-volume displaced vertex (DV) detector, situated on the surface above CMS and designed to search for long-lived particles (LLPs) produced at the HL-LHC. We show that a discovery of LLPs at MATHUSLA would not only prove the existence of BSM physics, it would also uncover the theoretical origin of the LLPs, despite the fact that MATHUSLA gathers no energy or momentum information on the LLP decay products. Our analysis is simple and robust, making it easily generalizable to include more complex LLP scenarios, and our methods are applicable to LLP decays discovered in ATLAS, CMS, LHCb, or other external detectors. In the event of an LLP detection, MATHUSLA can act as a Level-1 trigger for the main detector, guaranteeing that the LLP production event is read out at CMS. We perform an LLP simplified model analysis to show that combining information from the MATHUSLA and CMS detectors would allow the LLP production mode topology to be determined with as few as ∼ 100 observed LLP decays. Underlying theory parameters, like the LLP and parent particle masses, can also be measured with ≲ 10% precision. Together with information on the LLP decay mode from the geometric properties of the observed DV, it is clear that MATHUSLA and CMS together will be able to characterize any newly discovered physics in great detail.
Degradation state prediction of rolling bearings using ARX-Laguerre model and genetic algorithms
Authors: Najeh Taoufik , Lundberg Jan 
Published: December 2020

AbstractThis study is motivated by the need for a new advanced vibration-based bearing monitoring approach. The ARX-Laguerre model (autoregressive with exogenous) and genetic algorithms (GAs) use collected vibration data to estimate a bearing’s remaining useful life (RUL). The concept is based on the actual running conditions of the bearing combined with a new linear ARX-Laguerre representation. The proposed model exploits the vibration and force measurements to reconstruct the Laguerre filter outputs; the dimensionality reduction of the model is subject to an optimal choice of Laguerre poles which is performed using GAs. The paper explains the test rig, data collection, approach, and results. So far and compared to classic methods, the proposed model is effective in tracking the evolution of the bearing’s health state and accurately estimates the bearing’s RUL. As long as the collected data are relevant to the real health state of the bearing, it is possible to estimate the bearing’s lifetime under different operating conditions.
Comprehensive genomic and immunophenotypic analysis of CD4 T cell infiltrating human triple-negative breast cancer
Authors: Zhang He , Qin Guohui , Yu Hui , Han Xu , Zhu Sha 
Published: December 2020

AbstractThe aim of this study is to investigate the gene expression module of tumor-infiltrating CD4+T cells and its potential roles in modulating immune cell functions in triple-negative breast cancer. Differentially expressed genes were identified by comparison of the expression profile in CD4+T cells isolated from tumor tissues and peripheral blood of TNBC patients respectively. The differential expression analysis was conducted using R, and then the functional and pathway enrichment of the DEGs were analyzed using GSEA, followed by integrated regulatory network construction and genetic analysis of tumor-infiltrating immune cells based on a scientific deconvolution algorithm. As a result, abundant Treg and exhausted lymphocytes were detected, accompanied by largely decreased of effector/memory and cytotoxic T cells. Immune-related gene correlation analysis showed that the extent of follicular helper T cells gene expression signatures were inversely associated with those of CD4+ naive T cells and CD4+ memory resting T cells, but positively correlated with that of CD4+ memory activated T cells. In addition, we found five core genes including IFNG, CTLA4, FAS, CXCR6, and JUN were significantly over expressed in CD4+ TILs which may contribute to exhaustion of lymphocytes and participate in biological processes associated with regulation of chemotaxis. Study provides a comprehensive understanding of the roles of DEGs associated with the chemotactic and exhausted immunophenotypes of CD4+ TILs that are a valuable resource from which future investigation may be carried out to better understand the mechanisms that promote TNBC progression.
Medizinethik und Ökonomie im Krankenhaus – die Kluft zwischen Anspruch und Wirklichkeit. Ergebnisse einer qualitativen Studie
Authors: Wehkamp Karl-Heinz 
Published: December 2020

ZusammenfassungIn einer qualitativen Interviewstudie zur Situation und zu Veränderungen in deutschen Krankenhäusern berichteten GeschäftsführerInnen und ÄrztInnen übereinstimmend von hohem und zunehmendem Druck, mittels der medizinisch-pflegerischen Leistungen Gewinne machen zu müssen. Während die GeschäftsführerInnen dabei jedoch bei patientenbezogenen ärztlichen Entscheidungen keine ethischen Konflikte sahen, berichteten ÄrztInnen von erheblichen Verletzungen des ärztlichen Ethos. Während die GeschäftsführerInnen erklärten, sie würden von den ÄrztInnen „ethisch korrektes Entscheiden“ erwarten, berichteten ÄrztInnen, dass die Rahmenbedingungen ihrer Arbeit die Unabhängigkeit ärztlicher Entscheidungen untergrüben, indem betriebswirtschaftliche Interessen die Medizin korrumpierten. Entscheidungen zur stationären Aufnahme, zur Wahl der Behandlungsprozesse und zur Entlassung der PatientInnen seien in zunehmendem Maße an wirtschaftlichen Interessen des Hauses und damit nicht allein an den medizinischen Bedarfen der PatientInnen orientiert. GeschäftsführerInnen bewerteten die Unabhängigkeit ärztlicher Entscheidungen hoch, während ÄrztInnen diese als deutlich eingeschränkt bezeichneten. Die Ergebnisse verweisen auf ungelöste Konflikte zwischen Medizinethik und „Ökonomie“. Organisationsethik ist zur Vermittlung auf der Ebene der Krankenhäuser und des Gesundheitswesens insgesamt gefordert. Sie muss sich darüber hinaus mit der Wissensproduktion im Feld der Versorgungs- und Qualitätsforschung kritisch auseinandersetzen.