Article
Physics, Multidisciplinary
Jacome Armas, Akash Jain
Summary: The research presents the formulation of the Schwinger-Keldysh effective field theory of hydrodynamics without boost symmetry and explores various transport coefficients and fluctuation modes. The new hydrodynamic framework provides a unified stable approach for studying different types of fluids.
Article
Physics, Particles & Fields
Ping Gao, Hong Liu
Summary: In non-maximally quantum chaotic systems, the exponential behavior of OTOCs is caused by the summation of exchanges of an infinite tower of higher spin operators. We construct an (0 + 1)-dimensional EFT to capture these exchanges and predict the general structure of OTOCs.
JOURNAL OF HIGH ENERGY PHYSICS
(2023)
Article
Multidisciplinary Sciences
Bokai Zhang, Premkumar Leishangthem, Yang Ding, Xinliang Xu
Summary: This work presents an effective model for near-field hydrodynamic interactions, validated numerically, which has a significant impact on the dynamics of bacterium-sphere pairs and can efficiently simulate active fluids systems.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Physics, Particles & Fields
Xiaoyang Huang, Andrew Lucas
Summary: This paper develops a hydrodynamic effective field theory on the Schwinger-Keldysh contour for fluids with conservation of charge, energy, and momentum, but with only discrete rotational symmetry. The effects of anisotropy on thermodynamics and first-order dissipative hydrodynamics are explained through simple examples in two spatial dimensions, although the theory can be extended to any number of spatial dimensions and any rotation group (discrete or continuous). The study uncovers several possible terms in the equations of motion that are compatible with the existence of an entropy current, but not with the ability to couple the fluid to background gauge fields and vielbein.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Multidisciplinary Sciences
J. A. Camargo-Martinez, F. Mesa, G. I. Gonzalez-Pedreros
Summary: This study analyzes the temperature effects on the calculation of the functional derivative of the superconducting transition temperature Tc with respect to the electron-phonon coupling function alpha F-2(omega) and the mu* parameter. By identifying the frequency regions where phonons are most effective in raising Tc, it provides insights into the physical conditions and theoretical estimation of Tc in the superconducting state.
Article
Astronomy & Astrophysics
Stefan Floerchinger, Eduardo Grossi
Summary: The article discusses how the quantum effective action encodes Noether currents at the full quantum level. It also explores extended transformations and the corresponding nonconserved Noether currents. The paper focuses on symmetries and extended transformations associated with space-time geometry and presents a new divergence-type equation of motion for the shear current.
Article
Astronomy & Astrophysics
Gabriel S. Rocha, Gabriel S. Denicol
Summary: Matching conditions are crucial in determining the overall consistency properties of relativistic fluid dynamics. This paper derives transient fluid dynamics from kinetic theory without imposing a specific matching condition, and then examines how the choice of matching condition affects the equations of motion and transport coefficients.
Article
Physics, Particles & Fields
Temple He, R. Loganayagam, Mukund Rangamani, Akhil Sivakumar, Julio Virrueta
Summary: This article investigates planar black holes in AdS, which are holographically dual to compressible relativistic fluids and possess long-lived phonon modes. These modes capture the physics of attenuated sound propagation and energy transfer in the plasma. The open effective field theory of the fluctuating phonon degree of freedom is described, and the dynamics of the phonon is encoded in a single scalar field with non-trivial spatial momentum dependence. The article also discusses the classification of gravitational modes based on their Markovianity index and remarks on the presence of additional spatially homogeneous zero modes.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
Michael Trott
Summary: This specific methodology helps to assign theoretical uncertainties in a systematic way in the Standard Model effective field theory during leading-order global fits, while also reducing computational and theoretical burden to advance such analyses to dimension eight systematically.
Article
Astronomy & Astrophysics
Zi-Yu Dong, Teng Ma, Jing Shu, Yu-Hui Zheng
Summary: This paper solves the long-standing problem of operator basis construction for fields with all masses and spins. It proposes a novel method to systematically construct a complete set of lowest dimensional amplitude bases and presents a matrix projection method for constructing massive amplitude bases involving identical particles.
Article
Astronomy & Astrophysics
Swastik Bhattacharya, S. Shankaranarayanan
Summary: This work describes the interaction between non-stationary black hole horizons and external fields using effective field theory methods, providing insights beyond classical black hole physics. The authors construct a low-energy effective field theory description for the horizon-fluid of a 4-dimensional, asymptotically flat, Einstein black hole, finding that a deformed Conformal Field Theory can naturally satisfy the requirements of near-horizon symmetries and length scales due to external perturbations. The study also determines the mass and viscosity of the horizon-fluid, which affects the scrambling time of black holes.
Article
Astronomy & Astrophysics
Y. S. Hung, S. P. Miao
Summary: In this article, we consider two models that couple derivatives of the inflaton to ordinary matter, including fermions and scalars. Such couplings induce changes to the inflaton kinetic energy, similar to the cosmological Coleman-Weinberg potentials from nonderivative couplings. Our objective is to investigate whether these quantum-induced k-essence models can provide efficient reheating without affecting the observational constraints on primordial inflation. Our numerical studies demonstrate that it is difficult to preserve both properties simultaneously.
Article
Astronomy & Astrophysics
Nikolay Bobev, Vasil Dimitrov, Valentin Reys, Annelien Vekemans
Summary: Using recent results in four-derivative 5d N = 2 minimal gauged supergravity, the regularized on-shell action of the Euclidean solution in this theory that admits a Lorentzian continuation to an AdS(5) black hole with one electric charge and two angular momenta is evaluated. It is shown that the supersymmetric limit of this solution can be described purely in terms of angular momentum fugacities and the 't Hooft anomalies for the U(1)(R) R symmetry of the dual 4d N = 1 superconformal field theory using holography. This holographic calculation is in perfect agreement with recent studies of the 4d N = 1 superconformal index on the second sheet. Additionally, the leading four-derivative corrections to the Bekenstein-Hawking entropy are explicitly calculated for the black hole solution.
Review
Physics, Multidisciplinary
Johan Henriksson
Summary: The critical O(N) CFT, occurring in spacetime dimensions 2 < d < 4, is a significant example of a conformal field theory, with the Ising CFT at N = 1, 2 <= d < 4, as a notable instance. Besides its many physical applications, it serves as a practical platform for testing new approaches and techniques based on conformal symmetry. Various conformal data have been computed in perturbative limits, such as the 4 - epsilon expansion, the large N expansion, and the 2+epsilon similar to expansion. This report provides an overview of the critical O(N) CFT, discusses methods for studying it, and presents a comprehensive collection of conformal data, including additional computations of order epsilon anomalous dimensions available in an ancillary data file.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2023)
Article
Physics, Particles & Fields
Javier Fuentes-Martin, Matthias Koenig, Julie Pages, Anders Eller Thomsen, Felix Wilsch
Summary: This article introduces Matchete, a computer tool for matching weakly-coupled models at one-loop order. It can directly compute all matching contributions and simplify redundant operators from the output. This tool is crucial for studying the impact of new-physics models on low-energy observables.
EUROPEAN PHYSICAL JOURNAL C
(2023)
Article
Physics, Multidisciplinary
Luca V. Delacretaz, Alberto Nicolis, Riccardo Penco, Rachel A. Rosen
PHYSICAL REVIEW LETTERS
(2015)
Article
Physics, Particles & Fields
Alberto Nicolis, Riccardo Penco, Federico Piazza, Riccardo Rattazzi
JOURNAL OF HIGH ENERGY PHYSICS
(2015)
Article
Physics, Particles & Fields
Solomon Endlich, Alberto Nicolis, Riccardo Penco
JOURNAL OF HIGH ENERGY PHYSICS
(2015)
Article
Astronomy & Astrophysics
Jonghee Kang, Alberto Nicolis
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2016)
Article
Physics, Particles & Fields
A. Esposito, S. Garcia-Saenz, A. Nicolis, R. Penco
JOURNAL OF HIGH ENERGY PHYSICS
(2017)
Article
Physics, Particles & Fields
Sebastian Garcia-Saenz, Ermis Mitsou, Alberto Nicolis
JOURNAL OF HIGH ENERGY PHYSICS
(2018)
Article
Physics, Multidisciplinary
Angelo Esposito, Rafael Krichevsky, Alberto Nicolis
PHYSICAL REVIEW LETTERS
(2019)
Article
Physics, Particles & Fields
Lasma Alberte, Alberto Nicolis
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Article
Astronomy & Astrophysics
Alberto Nicolis, Guanhao Sun
Summary: In the context of icosahedral inflation, the mixed scalar-tensor two-point function is expected to be perturbatively small within the effective field theory, but it can be significantly larger than the tensor spectrum. Observational implications for the CMB temperature-polarization spectrum are discussed.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2021)
Article
Physics, Particles & Fields
Ioanna Kourkoulou, Alberto Nicolis, Guanhao Sun
Summary: The article discusses a technically similar problem in a system called framid, where the stress-energy tensor has a Lorentz-invariant expectation value on the ground state without symmetry-based selection rules enforcing it. The Lorentz invariance of the expectation value is verified through explicit one-loop computations, which depend on highly nontrivial cancellations to yield the expected results.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Astronomy & Astrophysics
Alberto Nicolis, Federico Piazza, Kenza Zeghari
Summary: This paper revisits rotating cosmologies within the framework of mini-superspace, emphasizing the symmetries and conservation laws. The physical rotation of solid-driven cosmologies is characterized by a conserved angular momentum. The results confirm previous findings regarding the slow decay of anisotropies in solid inflation.
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS
(2022)
Article
Physics, Particles & Fields
Austin Joyce, Alberto Nicolis, Alessandro Podo, Luca Santoni
Summary: The text discusses the subtleties of renormalization that arise when deriving a low-energy effective action by integrating out heavy fields of a more complete theory. It provides a concrete example of applying this method to derive the U(1) Goldstone low-energy effective theory and the one-loop equation of state for the superfluid phase of (complex) phi(4). Additionally, it analyzes a renormalizable scalar SO(N) theory at finite chemical potential, demonstrating the absence of the original SO(N) symmetry in the effective theory for the gapless Goldstone.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Physics, Particles & Fields
Angelo Esposito, Rafael Krichevsky, Alberto Nicolis
JOURNAL OF HIGH ENERGY PHYSICS
(2020)
Article
Materials Science, Multidisciplinary
Alberto Nicolis, Riccardo Penco
Article
Optics
Angelo Esposito, Rafael Krichevsky, Alberto Nicolis
