197 citations · 527 across the 20 of their papers we have counts for
20 papers
Open Questions about Time and Self-reference in Living Systems
Samson Abramsky, Wolfgang Banzhaf, Leo S. D. Caves +5
Living systems exhibit a range of fundamental characteristics: they are active, self-referential, self-modifying systems. This paper explores how these characteristics create chall…
Unsupervised self-organising map of prostate cell Raman spectra shows disease-state subclustering
Daniel West, Susan Stepney, Y. Hancock
Prostate cancer is a disease which poses an interesting clinical question: should it be treated? A small subset of prostate cancers are aggressive and require removal and treatment…
Noise-Aware Training of Neuromorphic Dynamic Device Networks
Luca Manneschi, Ian T. Vidamour, Kilian D. Stenning +13
Physical computing has the potential to enable widespread embodied intelligence by leveraging the intrinsic dynamics of complex systems for efficient sensing, processing, and inter…
Spatial correlations in the qubit properties of D-Wave 2000Q measured and simulated qubit networks
Jessica Park, Susan Stepney, Irene D'Amico
We show strong positive spatial correlations in the qubits of a D-Wave 2000Q quantum annealing chip that are connected to qubits outside their own unit cell. By simulating the dyna…
A perspective on physical reservoir computing with nanomagnetic devices
Dan A Allwood, Matthew O A Ellis, David Griffin +11
Neural networks have revolutionized the area of artificial intelligence and introduced transformative applications to almost every scientific field and industry. However, this succ…
Quantifying the Computational Capability of a Nanomagnetic Reservoir Computing Platform with Emergent Magnetization Dynamics
Ian T Vidamour, Matthew O A Ellis, David Griffin +12
Devices based on arrays of interconnected magnetic nano-rings with emergent magnetization dynamics have recently been proposed for use in reservoir computing applications, but for…
Reservoir Computing with Magnetic Thin Films
Matthew Dale, David Griffin, Richard F. L. Evans +6
Advances in artificial intelligence are driven by technologies inspired by the brain, but these technologies are orders of magnitude less powerful and energy efficient than biologi…
Visualising high-dimensional state spaces with "Tuple Plots"
Susan Stepney
Complex systems are described with high-dimensional data that is hard to visualise. Inselberg's parallel coordinates are one representation technique for visualising high-dimension…
MetaChem: An Algebraic Framework for Artificial Chemistries
Penelope Faulkner Rainford, Angelika Sebald, Susan Stepney
We introduce MetaChem, a language for representing and implementing Artificial Chemistries. We motivate the need for modularisation and standardisation in representation of artific…
Evolving Graphs with Semantic Neutral Drift
Timothy Atkinson, Detlef Plump, Susan Stepney
We introduce the concept of Semantic Neutral Drift (SND) for genetic programming (GP), where we exploit equivalence laws to design semantics preserving mutations guaranteed to pres…
A Substrate-Independent Framework to Characterise Reservoir Computers
Matthew Dale, Julian F. Miller, Susan Stepney +1
The Reservoir Computing (RC) framework states that any non-linear, input-driven dynamical system (the reservoir) exhibiting properties such as a fading memory and input separabilit…
Computability and Complexity of Unconventional Computing Devices
Hajo Broersma, Susan Stepney, Goran Wendin
We discuss some claims that certain UCOMP devices can perform hypercomputation (compute Turing-uncomputable functions) or perform super-Turing computation (solve NP-complete proble…
The Geometry of Speed Limiting Resources in Physical Models of Computation
Benjamin Russell, Susan Stepney
We study the maximum speed of quantum computation and how it is affected by limitations on physical resources. We show how the resulting concepts generalize to a broader class of p…
A Geometrical Derivation of a Family of Quantum Speed Limit Results
Benjamin Russell, Susan Stepney
We derive a family of quantum speed limit results in time independent systems with pure states and a finite dimensional state space, by using a geometric method based on right inva…
Zermelo Navigation in the Quantum Brachistochrone
Benjamin Russell, Susan Stepney
We analyse the optimal times for implementing unitary quantum gates in a constrained finite dimensional controlled quantum system. The family of constraints studied is that the per…
Zermelo Navigation and a Speed Limit to Quantum Information Processing
Benjamin Russell, Susan Stepney
We use a specific geometric method to determine speed limits to the implementation of quantum gates in controlled quantum systems that have a specific class of constrained control…
When does a physical system compute?
Dominic Horsman, Susan Stepney, Rob C. Wagner +1
Computing is a high-level process of a physical system. Recent interest in non-standard computing systems, including quantum and biological computers, has brought this physical bas…
A Framework for Heterotic Computing
Susan Stepney, Viv Kendon, Peter Hines +1
Computational devices combining two or more different parts, one controlling the operation of the other, for example, derive their power from the interaction, in addition to the ca…
Boolean logic gate design principles in unconventional computers: an NMR case study
Matthias Bechmann, Angelika Sebald, Susan Stepney
We present a general method for analysing novel computational substrates to determine which of their parameters can be manipulated to exhibit the complete set of 2-input boolean lo…
Highly entangled multi-qubit states with simple algebraic structure
Juan E. Tapiador, Julio C. Hernandez-Castro, John A. Clark +1
Recent works by Brown et al and Borras et al have explored numerical optimisation procedures to search for highly entangled multi-qubit states according to some computationally tra…