George Fleming
YOU?
Author Swipe
View article: Studying QED <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:msub> <mml:mi/> <mml:mn>3</mml:mn> </mml:msub> </mml:math> with radial quantization on the lattice: Free limit
Studying QED with radial quantization on the lattice: Free limit Open
To investigate the three-dimensional quantum electrodynamics in the radial quantization on the lattice, the lattice action is constructed and the free limit is studied on $S^2 \times \mathbb{R}$. With the overlap fermion, it is numerically…
View article: Hyperstealth dark matter and long-lived particles
Hyperstealth dark matter and long-lived particles Open
A new dark matter candidate is proposed that arises as the lightest baryon from a confining SU(N) gauge theory which equilibrates with the Standard Model only through electroweak interactions. Surprisingly, this candidate can be as light a…
View article: Filtered Rayleigh-Ritz is all you need
Filtered Rayleigh-Ritz is all you need Open
Recent work has shown that the (block) Lanczos algorithm can be used to extract approximate energy spectra and matrix elements from (matrices of) correlation functions in quantum field theory, and identified exact coincidences between Lanc…
View article: Fermion determinants on a quantum computer
Fermion determinants on a quantum computer Open
We present a quantum algorithm to compute the logarithm of the determinant of the fermion matrix, assuming access to a classical lattice gauge field configuration. The algorithm uses the quantum eigenvalue transform, and quantum mean estim…
View article: Ising on $\mathbb{S}^2$ -- The Affine Conjecture
Ising on $\mathbb{S}^2$ -- The Affine Conjecture Open
We review the recent construction \cite{brower2024isingmodelmathbbs2} of the 2d Ising model on a triangulated sphere $\mathbb{S}^2$. Surprisingly, this led to a precise map of the lattice couplings to the target geometry in order to reach …
View article: Automated tuning for HMC mass ratios
Automated tuning for HMC mass ratios Open
We extended previous work on tuning HMC parameters using gradient information to include Hasenbusch mass ratios. The inclusion of mass ratios adds many more parameters that need to be tuned, and also allows for lots of variations in the ch…
View article: Hyper Stealth Dark Matter and Long-Lived Particles
Hyper Stealth Dark Matter and Long-Lived Particles Open
A new dark matter candidate is proposed that arises as the lightest baryon from a confining $SU(N)$ gauge theory which equilibrates with the Standard Model only through electroweak interactions. Surprisingly, this candidate can be as light…
View article: Stealth dark matter spectrum using Laplacian Heaviside smearing and irreducible representations
Stealth dark matter spectrum using Laplacian Heaviside smearing and irreducible representations Open
We present nonperturbative lattice calculations in the quenched approximation of the low-lying meson and baryon spectrum of the SU(4) gauge theory with fundamental fermion constituents. This theory is one instance of stealth dark matter, a…
View article: Stealth Dark Matter
Stealth Dark Matter Open
View article: Light scalar meson and decay constant in SU(3) gauge theory with eight dynamical flavors
Light scalar meson and decay constant in SU(3) gauge theory with eight dynamical flavors Open
The SU(3) gauge theory with Nf=8 nearly massless Dirac fermions has long been of theoretical and phenomenological interest due to the near-conformality arising from its proximity to the conformal window. One particularly interesting featur…
View article: Fermion determinants on a quantum computer
Fermion determinants on a quantum computer Open
We present a quantum algorithm to compute the logarithm of the determinant of the fermion matrix, assuming access to a classical lattice gauge field configuration. The algorithm uses the quantum eigenvalue transform, and quantum mean estim…
View article: Operator product expansion for radial lattice quantization of 3D <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>ϕ</mml:mi><mml:mn>4</mml:mn></mml:msup></mml:math> theory
Operator product expansion for radial lattice quantization of 3D theory Open
At its critical point, the three-dimensional lattice Ising model is described by a conformal field theory (CFT), the 3D Ising CFT. Instead of carrying out simulations on Euclidean lattices, we use the quantum finite elements method to impl…
View article: Matching Curved Lattices to Anisotropic Tangent Planes
Matching Curved Lattices to Anisotropic Tangent Planes Open
Radial quantization would be the ideal formalism for studying strongly-coupled near-conformal quantum field theories but it requires the ability to perform lattice calculations on static, curved manifolds, specifically a very long cylinder…
View article: A survey for variable young stars with small telescopes – IX. Evolution of spot properties on YSOs in IC 5070
A survey for variable young stars with small telescopes – IX. Evolution of spot properties on YSOs in IC 5070 Open
We present spot properties on 32 periodic young stellar objects in IC 5070. Long term, ∼5 yr, light curves in the V, R, and I-bands are obtained through the HOYS (Hunting Outbursting Young Stars) citizen science project. These are dissecte…
View article: A survey for variable stars with small telescopes: IX -- Evolution of Spot Properties on YSOs in IC5070
A survey for variable stars with small telescopes: IX -- Evolution of Spot Properties on YSOs in IC5070 Open
We present spot properties on 32 periodic young stellar objects in IC 5070. Long term, $\sim$5 yr, light curves in the $V$, $R$, and $I$-bands are obtained through the HOYS (Hunting Outbursting Young Stars) citizen science project. These a…
View article: A survey for variable young stars with small telescopes – VIII. Properties of 1687 <i>Gaia</i> selected members in 21 nearby clusters
A survey for variable young stars with small telescopes – VIII. Properties of 1687 <i>Gaia</i> selected members in 21 nearby clusters Open
The Hunting Outbursting Young Stars (HOYS) project performs long-term, optical, multifilter, high cadence monitoring of 25 nearby young clusters and star-forming regions. Utilizing Gaia DR3 data, we have identified about 17 000 potential y…
View article: A survey for variable young stars with small telescopes: VIII -- Properties of 1687 Gaia selected members in 21 nearby clusters
A survey for variable young stars with small telescopes: VIII -- Properties of 1687 Gaia selected members in 21 nearby clusters Open
The Hunting Outbursting Young Stars (HOYS) project performs long-term, optical, multi-filter, high cadence monitoring of 25 nearby young clusters and star forming regions. Utilising Gaia DR3 data we have identified about 17000 potential yo…
View article: Stealth dark matter spectrum using LapH and Irreps
Stealth dark matter spectrum using LapH and Irreps Open
We present non-perturbative lattice calculations of the low-lying meson and baryon spectrum of the SU(4) gauge theory with fundamental fermion constituents. This theory is one instance of stealth dark matter, a class of strongly coupled th…
View article: Nonperturbative Exploration of Near-Conformal Dynamics
Nonperturbative Exploration of Near-Conformal Dynamics Open
This project had three major goals: Explore qheories of composite dark matter and composite Higgs bosons through the work of the Lattice Strong Dynamics (LSD) collaboration.; Extend lattice gauge theories to curved manifolds through the wo…
View article: Hidden conformal symmetry from the lattice
Hidden conformal symmetry from the lattice Open
We analyze newly expanded and refined data from lattice studies of an SU(3) gauge theory with eight Dirac fermions in the fundamental representation. We focus on the light composite states emerging from these studies, consisting of a set o…
View article: The Operator Product Expansion for Radial Lattice Quantization of 3D $ϕ^4$ Theory
The Operator Product Expansion for Radial Lattice Quantization of 3D $ϕ^4$ Theory Open
At its critical point, the three-dimensional lattice Ising model is described by a conformal field theory (CFT), the 3d Ising CFT. Instead of carrying out simulations on Euclidean lattices, we use the Quantum Finite Elements method to impl…
View article: Dataset for "The Operator Product Expansion for Radial Lattice Quantization of 3D φ4 Theory"
Dataset for "The Operator Product Expansion for Radial Lattice Quantization of 3D φ4 Theory" Open
Description of the data This dataset is supplement to the paper "The Operator Product Expansion for Radial Lattice Quantization of 3D φ4 Theory". It contains the raw data for the partial wave expansion coefficients of the scalar four-point…
View article: Dataset for "The Operator Product Expansion for Radial Lattice Quantization of 3D φ4 Theory"
Dataset for "The Operator Product Expansion for Radial Lattice Quantization of 3D φ4 Theory" Open
Description of the data This dataset is supplement to the paper "The Operator Product Expansion for Radial Lattice Quantization of 3D φ4 Theory". It contains the raw data for the partial wave expansion coefficients of the scalar four-point…
View article: Beyond Generalized Eigenvalues in Lattice Quantum Field Theory
Beyond Generalized Eigenvalues in Lattice Quantum Field Theory Open
Two analysis techniques, the generalized eigenvalue method (GEM) or Prony's (or related) method (PM), are commonly used to analyze statistical estimates of correlation functions produced in lattice quantum field theory calculations. GEM ta…
View article: Beyond Generalized Eigenvalues
Beyond Generalized Eigenvalues Open
Two analysis techniques, the generalized eigenvalue method (GEM) or Prony's method (PM), are commonly used to analyze statistical estimates of correlation functions produced in lattice quantum field theory calculations. GEM takes full adva…
View article: Light Scalar Meson and Decay Constant in SU(3) Gauge Theory with Eight Dynamical Flavors
Light Scalar Meson and Decay Constant in SU(3) Gauge Theory with Eight Dynamical Flavors Open
The SU(3) gauge theory with $N_f=8$ nearly massless Dirac fermions has long been of theoretical and phenomenological interest due to the near-conformality arising from its proximity to the conformal window. One particularly interesting fea…
View article: Dataset for "Light Scalar Meson and Decay Constant in SU(3) Gauge Theory with Eight Dynamical Flavors"
Dataset for "Light Scalar Meson and Decay Constant in SU(3) Gauge Theory with Eight Dynamical Flavors" Open
Decoding File Names: Consider the file name f8l24t48b48m00889_S0.csv. We will break down the meaning of the various pieces of the filename "f8" means 8 Dirac flavors. "l24t48" means 243×48 lattice. "b48" means…
View article: Hidden Conformal Symmetry from the Lattice
Hidden Conformal Symmetry from the Lattice Open
We analyze newly expanded and refined data from lattice studies of an SU(3) gauge theory with eight Dirac fermions in the fundamental representation. We focus on the light composite states emerging from these studies, consisting of a set o…
View article: Computing the Central Charge of the 3D Ising CFT Using Quantum Finite Elements
Computing the Central Charge of the 3D Ising CFT Using Quantum Finite Elements Open
The 3D Ising conformal field theory (CFT) describes different physical systems, such as uniaxial magnets or fluids, at their critical points. In absence of an analytical solution for the 3D Ising model, the scaling dimensions and operator …
View article: A survey for variable young stars with small telescopes: VI – Analysis of the outbursting Be stars NSW 284, gaia 19eyy, and VES 263
A survey for variable young stars with small telescopes: VI – Analysis of the outbursting Be stars NSW 284, gaia 19eyy, and VES 263 Open
This paper is one in a series reporting results from small telescope observations of variable young stars. Here, we study the repeating outbursts of three likely Be stars based on long-term optical, near-infrared, and mid-infrared photomet…