Lucius Bushnaq
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View article: Stochastic Parameter Decomposition
Stochastic Parameter Decomposition Open
A key step in reverse engineering neural networks is to decompose them into simpler parts that can be studied in relative isolation. Linear parameter decomposition -- a framework that has been proposed to resolve several issues with curren…
View article: Open Problems in Mechanistic Interpretability
Open Problems in Mechanistic Interpretability Open
Mechanistic interpretability aims to understand the computational mechanisms underlying neural networks' capabilities in order to accomplish concrete scientific and engineering goals. Progress in this field thus promises to provide greater…
View article: Interpretability in Parameter Space: Minimizing Mechanistic Description Length with Attribution-based Parameter Decomposition
Interpretability in Parameter Space: Minimizing Mechanistic Description Length with Attribution-based Parameter Decomposition Open
Mechanistic interpretability aims to understand the internal mechanisms learned by neural networks. Despite recent progress toward this goal, it remains unclear how best to decompose neural network parameters into mechanistic components. W…
View article: Towards evaluations-based safety cases for AI scheming
Towards evaluations-based safety cases for AI scheming Open
We sketch how developers of frontier AI systems could construct a structured rationale -- a 'safety case' -- that an AI system is unlikely to cause catastrophic outcomes through scheming. Scheming is a potential threat model where AI syste…
View article: Using Degeneracy in the Loss Landscape for Mechanistic Interpretability
Using Degeneracy in the Loss Landscape for Mechanistic Interpretability Open
Mechanistic Interpretability aims to reverse engineer the algorithms implemented by neural networks by studying their weights and activations. An obstacle to reverse engineering neural networks is that many of the parameters inside a netwo…
View article: The Local Interaction Basis: Identifying Computationally-Relevant and Sparsely Interacting Features in Neural Networks
The Local Interaction Basis: Identifying Computationally-Relevant and Sparsely Interacting Features in Neural Networks Open
Mechanistic interpretability aims to understand the behavior of neural networks by reverse-engineering their internal computations. However, current methods struggle to find clear interpretations of neural network activations because a dec…
View article: A Causal Framework for AI Regulation and Auditing
A Causal Framework for AI Regulation and Auditing Open
Artificial intelligence (AI) systems are poised to become deeply integrated into society. If developed responsibly, AI has potential to benefit humanity immensely. However, it also poses a range of risks, including risks of catastrophic ac…
View article: $N_f = 1+2+1$ QCD+QED simulations with C$^\star$ boundary conditions
$N_f = 1+2+1$ QCD+QED simulations with C$^\star$ boundary conditions Open
We give an update on the ongoing effort of the RC$^\star$ collaboration to generate fully dynamical QCD+QED configurations with C$^\star$ boundary conditions using the openQ$^\star$D code. The simulations are tuned to the U-symmetric point…
View article: $N_f = 1+2+1$ QCD+QED simulations with C$^\star$ boundary conditions
$N_f = 1+2+1$ QCD+QED simulations with C$^\star$ boundary conditions Open
We give an update on the ongoing effort of the RC$^\\star$ collaboration to generate fully dynamical QCD+QED configurations with C$^\\star$ boundary conditions using the openQ$^\\star$D code. The simulations are tuned to the U-symmetric po…
View article: First results on QCD+QED with C* boundary conditions
First results on QCD+QED with C* boundary conditions Open
View article: Tuning of QCD+QED simulations with C$^\star$ boundary conditions
Tuning of QCD+QED simulations with C$^\star$ boundary conditions Open
We give an update on the ongoing effort of the RC$^\\star$ collaboration to generate fully dynamical QCD+QED ensembles with C$^\\star$ boundary conditions using the openQ$^\\star$D code. The simulations were tuned to the U-symmetric point …
View article: Strange and charm contributions to the HVP from C* boundary conditions
Strange and charm contributions to the HVP from C* boundary conditions Open
We present preliminary results for the determination of the leading strange and charm quark-connected contributions to the hadronic vacuum polarization contribution to the muon's $g-2$. Measurements are performed on the RC$^{\\star}$ colla…
View article: Strange and charm contributions to the HVP from C* boundary conditions
Strange and charm contributions to the HVP from C* boundary conditions Open
We present preliminary results for the determination of the leading strange and charm quark-connected contributions to the hadronic vacuum polarization contribution to the muon's $g-2$. Measurements are performed on the RC$^{\star}$ collab…
View article: Hadronic vacuum polarization with C* boundary conditions
Hadronic vacuum polarization with C* boundary conditions Open
We present a progress report on the calculation of the connected hadronic contribution to the muon $g-2$ with C$^\\star$ boundary conditions. For that purpose we use a QCD gauge ensemble with 3+1 flavors and two QCD+QED gauge ensembles wit…
View article: Hadronic vacuum polarization with C* boundary conditions
Hadronic vacuum polarization with C* boundary conditions Open
We present a progress report on the calculation of the connected hadronic contribution to the muon g-2 with C* boundary conditions. For that purpose we use a QCD gauge ensemble with 3+1 flavors and two QCD+QED gauge ensembles with 1+2+1 fl…
View article: Tuning of QCD+QED simulations with C$^{\star}$ boundary conditions
Tuning of QCD+QED simulations with C$^{\star}$ boundary conditions Open
We give an update on the ongoing effort of the RC$^\star$ collaboration to generate fully dynamical QCD+QED ensembles with C$^\star$ boundary conditions using the openQ$^\star$D code. The simulations were tuned to the U-symmetric point ($m…
View article: Baryon masses from full QCD+QED$_C$ simulations
Baryon masses from full QCD+QED$_C$ simulations Open
In these proceedings we present preliminary results for the masses of the proton, neutron and Ω− baryons obtained from QCD+QED lattice simulations performed with four dynamical quarks using C∗ boundary conditions. These results are part of…
View article: An update on QCD+QED simulations with C* boundary conditions
An update on QCD+QED simulations with C* boundary conditions Open
We present two novelties in our analysis of fully dynamical QCD+QED ensembles with C* boundary conditions. The first one is the explicit computation of the sign of the Pfaffian. We present an algorithm that provides a significant speedup c…
View article: Implementing noise reduction techniques into the OpenQ*D package
Implementing noise reduction techniques into the OpenQ*D package Open
We present the results of testing a new technique for stochastic noise reduction in the calculation of propagators by implementing it in OpenQ*D for two ensembles with O(a) improved Wilson fermion action, with periodic boundary conditions …
View article: Implementing noise reduction techniques into theOpenQ*D package
Implementing noise reduction techniques into theOpenQ*D package Open
We present the results of testing a new technique for stochastic noise reduction in the calculation of propagators by implementing it in OpenQ*D for two ensembles with O(a) improved Wilson fermion action, with periodic boundary conditions …
View article: First results on QCD+QED with C$^{*}$ boundary conditions
First results on QCD+QED with C$^{*}$ boundary conditions Open
Accounting for isospin-breaking corrections is critical for achieving subpercent precision in lattice computations of hadronic observables. A way to include QED and strong-isospin-breaking corrections in lattice QCD calculations is to impo…
View article: Baryon masses from full QCD+QED${}_\text{C}$ simulations
Baryon masses from full QCD+QED${}_\text{C}$ simulations Open
In these proceedings we present preliminary results for the masses of the proton, neutron and $Ω^-$ baryons obtained from QCD+QED lattice simulations performed with four dynamical quarks using C$^*$ boundary conditions. These results are p…
View article: An update on QCD+QED simulations with C* boundary conditions
An update on QCD+QED simulations with C* boundary conditions Open
We present two novelties in our analysis of fully dynamical QCD+QED ensembles with C* boundary conditions. The first one is the explicit computation of the sign of the Pfaffian. We present an algorithm that provides a significant speedup c…