Publications (24)
Experimental study of fluid flows in a precessing cylindrical annulus
Yufeng Lin, Jerome Noir, Andrew Jackson
The flow inside a precessing fluid cavity has been given particular attention since the end of the 19th century in geophysical and industrial contexts. The present study aims at sh…
Phase Transitions in Decision Problems Over Odd-Sized Alphabets
Andrew Jackson
In [A. Jackson, Explaining the ubiquity of phase transitions in decision problems (2025), arXiv:2501.14569], I established that phase transitions are always present in a large subs…
Kinematic dynamo in spherical Couette flow
Xing Wei, Andrew Jackson, Rainer Hollerbach
We investigate numerically kinematic dynamos driven by flow of electrically conducting fluid in the shell between two concentric differentially rotating spheres, a configuration no…
Jais and Jais-chat: Arabic-Centric Foundation and Instruction-Tuned Open Generative Large Language Models
Neha Sengupta, Sunil Kumar Sahu, Bokang Jia +29
We introduce Jais and Jais-chat, new state-of-the-art Arabic-centric foundation and instruction-tuned open generative large language models (LLMs). The models are based on the GPT-…
Design and Microfabrication Considerations for Reliable Flexible Intracortical Implants
Harbaljit S. Sohal, Konstantin Vassilevski, Andrew Jackson +2
Current microelectrodes designed to record chronic neural activity suffer from recording instabilities due to the modulus mismatch between the electrode materials and the brain. We…
Improved Accreditation of Analogue Quantum Simulation and Establishing Quantum Advantage
Andrew Jackson, Animesh Datta
We improve on the results of [A. Jackson et al. Proc. Natl. Acad. Sci. U.S.A 121 (6). 2024] on the verification of analogue quantum simulators by eliminating the use of universal H…
Precession-driven dynamos in a full sphere and the role of large scale cyclonic vortices
Yufeng Lin, Philippe Marti, Jerome Noir +1
Precession has been proposed as an alternative power source for planetary dynamos. Previous hydrodynamic simulations suggested that precession can generate very complex flows in pl…
Nomad: Autonomous Exploration and Discovery
Bokang Jia, Samta Kamboj, Satheesh Katipomu +3
We introduce Nomad, a system for autonomous data exploration and insight discovery. Given a corpus of documents, databases, or other data sources, users rarely know the full set of…
Accreditation of Analogue Quantum Simulators
Andrew Jackson, Theodoros Kapourniotis, Animesh Datta
We present an accreditation protocol for analogue, i.e., continuous-time, quantum simulators. For a given simulation task, it provides an upper bound on the variation distance betw…
Meta-Learning Bidirectional Update Rules
Mark Sandler, Max Vladymyrov, Andrey Zhmoginov +4
In this paper, we introduce a new type of generalized neural network where neurons and synapses maintain multiple states. We show that classical gradient-based backpropagation in n…
Fine-tuning Image Transformers using Learnable Memory
Mark Sandler, Andrey Zhmoginov, Max Vladymyrov +1
In this paper we propose augmenting Vision Transformer models with learnable memory tokens. Our approach allows the model to adapt to new tasks, using few parameters, while optiona…
Large-scale vortices and zonal flows in spherical rotating convection
Yufeng Lin, Andrew Jackson
Motivated by understanding the dynamics of stellar and planetary interiors, we have performed a set of direct numerical simulations of Boussinesq convection in a rotating full sphe…
Strong field, scale separated, ultra low viscosity dynamos
Andrey Sheyko, Christopher Finlay, Jean Favre +1
The mechanism by which the Earth's magnetic field is generated is thought to be thermal convection in the metallic liquid iron core. Computational considerations previously restric…
Unitary Channel Testing Under a Depolarizing Noise Assumption
Hirak Ghosh, Andrew Jackson, Animesh Datta
We present fast algorithms $\unicode{x2013}$ under the depolarizing noise assumption, often made in fault-tolerant quantum computations $\unicode{x2013}$ to test its strength. Our…
Partition Function Estimation: Quantum and Quantum-Inspired Algorithms
Andrew Jackson, Theodoros Kapourniotis, Animesh Datta
We present two algorithms, one quantum and one classical, for estimating partition functions of quantum spin Hamiltonians. The former is a DQC1 (Deterministic quantum computation w…
Where Are All The Tourists From 3025?
Andrew Jackson
This paper examines the distinct lack of clear examples of time-travellers and proposes an explanation for their absence without assuming technical barriers to constructing time ma…
Extensively Not P-Bi-Immune promiseBQP-Complete Languages
Andrew Jackson
In this paper, I first establish -- via methods other than the Gottesman-Knill theorem -- the existence of an infinite set of instances of simulating a quantum circuit to decide a…
Rapidly rotating internally heated convection: bounds on long-time averages
Yutong Zhang, Ali Arslan, Stefano Maffei +1
Convection on geophysical and astrophysical scales is subject to rapid rotation and strong heating from within the domain. In studying the long-time behaviour of the solutions for…
Geophysical Inversion and Optimal Transport
Malcolm Sambridge, Andrew Jackson, Andrew P. Valentine
We propose a new approach to measuring the agreement between two oscillatory time series, such as seismic waveforms, and demonstrate that it can be employed effectively in inverse…
Detector rates for the Small Angle Neutron Scattering instruments at the European Spallation Source
Kalliopi Kanaki, Milan Klausz, Thomas Kittelmann +7
Building the European Spallation Source (ESS), the most powerful neutron source in the world, requires significant technological advances at most fronts of instrument component des…
Quantum Accreditation with Non-Clifford Two-qubit Gates
Andrew Jackson, Theodoros Kapourniotis, Animesh Datta
We develop a family of quantum accreditation protocols for quantum circuits with non-Clifford two-qubit gates. The latter includes families of gates such as the fSim and XY familie…
Accreditation Against Limited Adversarial Noise
Andrew Jackson
I present an accreditation protocol (a variety of quantum verification) where error is assumed to be adversarial (in contrast to the assumption error is implemented by identical CP…
Explaining the Ubiquity of Phase Transitions in Decision Problems
Andrew Jackson
I present an analytic approach to establishing the presence of phase transitions in a large set of decision problems. This approach does not require extensive computational study o…
Simulating the Dynamics of T Cell Subsets Throughout the Lifetime
Stephanie Foan, Andrew Jackson, Ian Spendlove +1
It is widely accepted that the immune system undergoes age-related changes correlating with increased disease in the elderly. T cell subsets have been implicated. The aim of this w…