Article
Physics, Fluids & Plasmas
Jin-Fu Ma, Jin-Fu Chen, C. P. Sun, Hui Dong
Summary: Landauer's principle imposes a fundamental limit on the energy cost of perfectly initializing a classical bit, but in practical operations, the finite operation time leads to an increase in energy cost. Specifically, when initializing the bit, the smaller the error, the higher the energy cost. A finite-time isothermal process can be used for bit initialization, and an optimal protocol to minimize the energy cost is proposed.
Article
Astronomy & Astrophysics
W. de Paula, E. Ydrefors, J. H. Alvarenga Nogueira, T. Frederico, G. Salme
Summary: The parton distribution of the pion is calculated for the first time using a dynamical equation in Minkowski space. The equation used is the homogeneous Bethe-Salpeter equation with a ladder kernel, described by constituent quarks, gluons, and an extended quark gluon vertex. Comparisons are made with experimental data and other calculations, showing that the parton distribution function of the pion is influenced by different components and varies with longitudinal-momentum fraction.
Article
Physics, Particles & Fields
Lento Nagano, Seiji Terashima
Summary: This note computes the vacuum expectation value of the commutator of scalar fields in a d-dimensional conformal field theory on the cylinder, finding the need for smearing in both space and time to ensure finite commutators. For non-free conformal field theories, equal time commutators of scalar fields are not well-defined, even if defined from the Lagrangian. The findings also apply to conformal field theories on Minkowski space when taking the small distance limit.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Particles & Fields
A. A. Artemev
Summary: In this note, we report on the properties of correlation numbers for 2-dimensional Liouville gravity coupled with (2, 2p + 1) minimal model at large p. In the limit of p -> infinity, we show that for certain examples in a specific region of parameter space, correlation numbers reduce to Weil-Petersson volumes, analytically continued to imaginary geodesic lengths. This indicates the connection between this limit and JT-gravity. We also discuss the geometric meaning of the obtained results outside of this region, particularly the meaning of the minimal model fusion rules. Another observation is the proportionality of correlation numbers to the number of conformal blocks when p is sufficiently large compared to the parameters of the correlator. This proportionality holds even without taking the limit.
Article
Astronomy & Astrophysics
T. Blum, P. A. Boyle, M. Bruno, N. H. Christ, D. Hoying, C. Kelly, C. Lehner, R. D. Mawhinney, A. S. Meyer, D. J. Murphy, C. T. Sachrajda, A. Soni, T. Wang
Summary: Phase shifts for s-wave MM scattering in both the I = 0 and I = 2 channels are determined from lattice QCD calculations, supporting the study of direct CP violation in K -> pi pi decay. Various techniques are used to refine the results and analyze systematic errors, with comparisons made to the generalized eigenvalue problem method.
Article
Astronomy & Astrophysics
Pasquale Bosso
Summary: Quantum mechanical models with a minimal length often involve modifying the relationship between position and momentum. While this is a minor complication in momentum space, the representation in (quasi-)position space poses many issues and leads to misunderstandings. This work reviews and clarifies some aspects of minimal length models, focusing on the representation of the position operator.
CLASSICAL AND QUANTUM GRAVITY
(2021)
Article
Astronomy & Astrophysics
Domenec Espriu, Alisa Katanaeva
Summary: This study reconsiders the use of holographic techniques in describing a 4D minimal composite Higgs model with a global symmetry breaking pattern of SO(5) -> SO(4), allowing the study of spin one and spin zero resonances. By implementing experimental constraints, it is found that the model can accommodate new vector resonances, with estimates on their production couplings in Standard Model processes.
Article
Physics, Particles & Fields
Jiayin Gu, Ying-Ying Li, Lian-Tao Wang
Summary: This paper examines the analytic structure of celestial amplitudes in a massless low-energy effective field theory and finds that fixed-order loop contributions do not accurately describe the analytic structure. By summing over the leading logarithmic contributions using renormalization group equations, richer analytic structures are observed.
JOURNAL OF HIGH ENERGY PHYSICS
(2022)
Article
Astronomy & Astrophysics
Viola Gattus, Apostolos Pilaftsis
Summary: We propose minimal SuperGeometric Quantum Field Theories (SG-QFTs) that involve transformations between scalar and fermion fields. We discuss the uniqueness of defining the field-space supermetric and show that different definitions can lead to distinct theories. The minimal SG-QFT models feature non-zero fermionic curvature in both two and four spacetime dimensions.
Article
Engineering, Electrical & Electronic
Tomasz P. Stefanski, Marek Czachor
Summary: In this letter, we demonstrate that the fractional curl operator, widely used in electromagnetics since 1998, is essentially a rotation operation of components of the complex Riemann-Silberstein vector representing the electromagnetic field. We show that this operator describes another representation of rotations of the electromagnetic field decomposed into circular polarisations and can be applied to a single-qubit phase-shift gate in quantum computing.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2023)
Article
Astronomy & Astrophysics
Maria Angeles Alberti Martin, Robert Schlesier, Jochen Zahn
Summary: In this paper, we use local and covariant renormalization techniques from quantum field theory in curved spacetimes to compute semiclassical corrections to the energy density of kinks in phi 4 theory and solitons in the sine-Gordon model in (1 + 1) dimensions. We recover the known results for the semiclassical correction to the energy. Our analysis highlights a subtlety in the definition of a conserved stress tensor for scalar field theories in (1 + 1) dimensions.
Article
Physics, Particles & Fields
Marco Garofalo, Fernando Romero-Lopez, Akaki Rusetsky, Carsten Urbach
Summary: The researchers tested an alternative method to extract the scattering length from lattice simulations in a finite volume, finding that the results were comparable to traditional methods with slightly smaller statistical uncertainties at larger volumes.
EUROPEAN PHYSICAL JOURNAL C
(2021)
Article
Physics, Multidisciplinary
Heru Sukamto, Lila Yuwana, Agus Purwanto
Summary: This paper discusses the influence of minimal length on relativistic physical systems, particularly the efficiency of a relativistic quantum heat engine. The chosen working substance is a Dirac particle trapped in a one-dimensional infinite potential well. The efficiency of the quantum heat engine is calculated analytically and numerically in three thermodynamic cycles: Carnot, Otto, and Brayton cycles. The research reveals that the minimal length acts as a correction factor for relativistic energy and can either increase or decrease the efficiency of the relativistic quantum heat engine depending on the particle mass, expansion parameter, and thermodynamic cycle.
Article
Physics, Particles & Fields
Ferruccio Feruglio
Summary: The study of gauge anomaly cancellation conditions in effective field theories reveals that potential anomalies from the non-renormalizable sector can be removed by adding a local counterterm, ultimately making the condition for gauge anomaly cancellation dependent on the charge assignment of the fermion sector.
JOURNAL OF HIGH ENERGY PHYSICS
(2021)
Article
Physics, Multidisciplinary
Klaus Bering
Summary: We prove the factorization theorem by demonstrating that the generating functional of connected tree diagrams is the Legendre transform of the action. We then apply this theorem to a specific example of a local relativistic interacting field theory in 2D with certain constraints. In doing so, we simplify the proof of the assumption that no particle production leads to specific models.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2023)
Article
Astronomy & Astrophysics
S. Hossenfelder
CLASSICAL AND QUANTUM GRAVITY
(2016)
Editorial Material
Physics, Multidisciplinary
Sabine Hossenfelder
Article
Astronomy & Astrophysics
Sabine Hossenfelder, Ricardo Gallego Torrome
CLASSICAL AND QUANTUM GRAVITY
(2018)
Article
Multidisciplinary Sciences
Sabine Hossenfelder, Stacy S. McGaugh
SCIENTIFIC AMERICAN
(2018)
Article
Astronomy & Astrophysics
Sabine Hossenfelder, Tobias Mistele
INTERNATIONAL JOURNAL OF MODERN PHYSICS D
(2018)
Article
Computer Science, Interdisciplinary Applications
Tobias Mistele, Tom Price, Sabine Hossenfelder
Article
History & Philosophy Of Science
Sabine Hossenfelder
Summary: This paper critically analyzes the arguments from finetuning and naturalness in particle physics and cosmology, identifying reasons why they are not scientifically relevant. It also discusses other numerological coincidences and their problems.
Article
Physics, Multidisciplinary
Michael te Vrugt, Sabine Hossenfelder, Raphael Wittkowski
Summary: This study extends the Mori-Zwanzig projection operator formalism to address the challenge of coarse-graining in general relativity, deriving a new dynamic equation for the Hubble parameter using the Buchert equations. The effects of averaging are captured through a memory function, leading to an empirical prediction for cosmic jerk.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
S. Donadi, S. Hossenfelder
Summary: A new path-integral approach over Hilbert space is proposed, which accurately reproduces quantum mechanics by optimizing the generating functional under a variation of the final state. The advantage of this method is that entangled states are directly included in the paths, and the generating functional can be modified to incorporate wave-function collapse.
Article
Astronomy & Astrophysics
T. Mistele, S. McGaugh, S. Hossenfelder
Summary: This study made rotation curve fits using the superfluid dark matter model and evaluated the relationship between the fits, stellar mass-to-light ratios, and the resemblance to MOND. The results showed that the mass-to-light ratios obtained with superfluid dark matter are generally reasonable, but they exhibit an unnatural dependence on galaxy size. Additionally, when the fits were forced to resemble MOND, there was tension between the total dark matter mass and gravitational lensing data.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Multidisciplinary Sciences
Jonte R. Hance, Sabine Hossenfelder
Summary: This article analyzes the relationship between the wave function and the possible measurement results in quantum mechanics, and proposes a more useful explanation of this relationship. It also discusses the issue of statistical independence violations in some common interpretations and theories, and introduces the concept of superdeterministic or retrocausal. Finally, it explains how this interpretation helps make sense of some puzzling phenomena in quantum mechanics.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2022)
Review
Physics, Multidisciplinary
Jonte R. Hance, Sabine Hossenfelder
Summary: We summarize various aspects of the measurement problem in quantum mechanics, emphasizing that it is a real problem in need of a solution. We argue that current interpretations of quantum mechanics cannot provide a solution as they are only interpretations and not extensions of the theory. Additionally, we speculate on the potential benefits of solving the measurement problem.
JOURNAL OF PHYSICS COMMUNICATIONS
(2022)
Article
Optics
Sandro Donadi, Sabine Hossenfelder
Summary: The local, deterministic toy model for quantum mechanics makes the same predictions as quantum mechanics when averaged over hidden variables. The dynamics depend on the settings of the measurement device at the time of detection but not on how those settings were chosen. Furthermore, the model is neither fine tuned nor allows for superluminal signaling.
Article
Astronomy & Astrophysics
Sabine Hossenfelder
Article
Astronomy & Astrophysics
Sabine Hossenfelder, Tobias Zingg
CLASSICAL AND QUANTUM GRAVITY
(2017)
