Dr Graham Kells

    Theoretical Physics, Physics

    Assistant Professor

    Biography

    Dr. Graham Kells is a theoretical physicist with interests in quantum technology, condensed matter,  complexity, and machine learning.   A native of Durrow Co. Laois, he completed a BSc in Applied Physics from DCU and and a PhD in Theoretical Physics at NUIM, before postdoctoral positions at MU, FU Berlin,  and then an Advanced  Fellowship in the Dublin Insitute for Advanced Studies (DIAS).  He held an Assistant professorship role in DCU before moving back to Maynooth in 2022. 

    Research Interests

    I am interested in complex quantum phenomena and much of my research to date has centred on topological band structures and their potential usefulness for quantum information processing. In this context, I have focused primarily on superconducting nano-wires, which have been proposed as a way to trap and manipulate Majorana bound-states. Other related research topics include the role played by quantum resonances in driven chaotic systems and the relationship between quantum error correction and topological spin models. More recently I’ve been working on so-called weak zero-modes and the possibility that they can be enhanced to robustly store quantum information at high temperatures.  I’ve also become interested in the formalism of third-quantisation and in measurement-induced entanglement transitions. 

    Research Projects

    Title Role Description Start date End date Amount
    Characterising and Stabilising Quantum Order in Complex Systems Principal Investigator 01/03/2017 31/12/2021

    Post Doctoral Fellows / Research Team

    Researcher Name Project Funding Body
    Kevin Kavanagh Characterising and Stabilising Quantum Order in Complex Systems
    Aaron Patrick Conlon Topological materials and topological devices

    Peer Reviewed Journal

    Year Publication
    2024 K. Kavanagh, J. K. Slingerland, S. Dooley, and G. Kells (2024) 'Topological fingerprints in Liouvillian gaps'. PHYSICAL REVIEW E, 110 . [Link] [DOI]
    2023 Graham Kells, Dganit Meidan, Alessandro Romito (2023) 'Topological transitions in weakly monitored free fermions'. Scipost Physics, 14 . [Link] [DOI]
    2022 Kavanagh, K; Dooley, S; Slingerland, JK; Kells, G (2022) 'Effects of quantum pair creation and annihilation on a classical exclusion process: the transverse XY model with TASEP'. New Journal of Physics, 24 . [DOI] [Full-Text]
    2022 Dooley S.; Kells G. (2022) 'Extreme many-body scarring in a quantum spin chain via weak dynamical constraints'. Physical Review B, 105 (15). [DOI] [Full-Text]
    2022 Nelson J.; Coopmans L.; Kells G.; Sanvito S. (2022) 'Data-driven time propagation of quantum systems with neural networks'. Physical Review B, 106 (4). [DOI] [Full-Text]
    2021 Coopmans L.; Dooley S.; Jubb I.; Kavanagh K.; Kells G. (2021) 'Dynamical phase error in interacting topological quantum memories'. Physical Review Research, 3 (3). [DOI]
    2021 Borsten L.; Jubb I.; Kells G. (2021) 'Impossible measurements revisited'. PHYSICAL REVIEW D  , 104 (2). [DOI]
    2021 Coopmans L.; Luo D.; Kells G.; Clark B.K.; Carrasquilla J. (2021) 'Protocol Discovery for the Quantum Control of Majoranas by Differentiable Programming and Natural Evolution Strategies'. Prx Quantum, 2 (2). [DOI]
    2020 Dooley S.; Kells G.; Katsura H.; Dorlas T.C. (2020) 'Simulating quantum circuits by adiabatic computation: Improved spectral gap bounds'. PHYSICAL REVIEW A, 101 (4). [DOI]
    2020 Pellegrino, D; Kells, G; Moran, N; Slingerland, JK (2020) 'Constructing edge zero modes through domain wall angle conservation'. Journal of Physics A: Mathematical and Theoretical, 53 . [DOI]
    2020 Dooley S.; Kells G. (2020) 'Enhancing the effect of quantum many-body scars on dynamics by minimizing the effective dimension'. Physical Review B, 102 (19). [DOI] [Full-Text]
    2020 Nulty, S; Vala, J; Meidan, D; Kells, G (2020) 'Constrained thermalization and topological superconductivity'. Physical Review B, 102 . [DOI]
    2019 Conlon A.; Pellegrino D.; Slingerland J.; Dooley S.; Kells G. (2019) 'Error generation and propagation in Majorana-based topological qubits'. Physical Review B, 100 (13). [DOI] [Full-Text]
    2018 Kells G.; Moran N.; Meidan D. (2018) 'Localization enhanced and degraded topological order in interacting p -wave wires'. Physical Review B, 97 (8). [DOI]
    2017 Moran N.; Pellegrino D.; Slingerland J.; Kells G. (2017) 'Parafermionic clock models and quantum resonance'. Physical Review B, 95 (23). [DOI] [Full-Text]
    2015 Kells G. (2015) 'Multiparticle content of Majorana zero modes in the interacting p -wave wire'. Physical Review B - Condensed Matter and Materials Physics, 92 (15). [DOI]
    2015 Kells, G (2015) 'Many-body Majorana operators and the equivalence of parity sectors'. Physical Review B - Condensed Matter and Materials Physics, 92 . [DOI]
    2014 Kells G.; Sen D.; Slingerland J.; Vishveshwara S. (2014) 'Topological blocking in quantum quench dynamics'. Physical Review B - Condensed Matter and Materials Physics, 89 (23). [DOI] [Full-Text]
    2013 G. Kells, V. Lahtinen and J. Vala (2013) 'Kitaev spin models from topological nanowire networks'. arXiv:1309.2447 . [Full-Text]
    2012 F. Pientka, G. Kells, A. Romito, P. W. Brouwer, and F. von Oppen (2012) 'Enhanced Zero-Bias Majorana Peak in the Differential Tunneling Conductance of Disordered Multi-subband Quantum-Wire/Superconductor Junctions'. Physical Review Letters, 109 .
    2012 G. Kells, D. Meidan and P. W. Brouwer (2012) 'Low-energy sub-gap states in multi-channel p-wave superconducting wires'. Physical Review B, 85 .
    2012 M.-T. Rieder, G. Kells, M. Duckheim, D. Meidan and P. W. Brouwer (2012) 'Endstates in multichannel spinless p-wave superconducting wires'. Physical Review B, 86 .
    2012 G. Kells, D. Meidan, and P. W. Brouwer (2012) 'Near-zero-energy end states in topologically trivial spin-orbit coupled superconducting nanowires with a smooth confinement'. Physical Review B, 86 .
    2011 Moran, N; Kells, G; Vala, J (2011) 'Diagonalisation of quantum observables on regular lattices and general graphs'. Computer Physics Communications, 182 :1083-1092. [DOI]
    2011 Kells, G; Kailasvuori, J; Slingerland, JK; Vala, J (2011) 'Kaleidoscope of topological phases with multiple Majorana species'. New Journal of Physics, 13 . [DOI] [Full-Text]
    2010 G. Kells and J. Vala (2010) 'Chiral edge modes on a p-wave magnetic spin model'. 82 . [Full-Text]
    2010 G. Kells, D. Mehta, J.K. Slingerland and J. Vala. (2010) 'Exact results on the star lattice chiral spin liquid'. Physical Review B, 81 . [Full-Text]
    2009 Kells, G; Moran, N; Vala, J (2009) 'Finite size effects in the Kitaev honeycomb lattice model on a torus'. Journal of Statistical Mechanics: Theory and Experiment, . [DOI] [Full-Text]
    2009 G. Kells, J. K. Slingerland and J. Vala. (2009) 'A description of Kitaev's honeycomb model with toric code stabilizers'. Physical Review B, 80 . [Full-Text]
    2008 Lahtinen, V; Kells, G; Carollo, A; Stitt, T; Vala, J; Pachos, JK (2008) 'Spectrum of the non-abelian phase in Kitaev's honeycomb lattice model'. Annals of Physics, 323 :2286-2310. [DOI] [Full-Text]
    2008 Kells, G; Bolukbasi, AT; Lahtinen, V; Slingerland, JK; Pachos, JK; Vala, J (2008) 'Topological Degeneracy and Vortex Manipulation in Kitaev's Honeycomb Model'. Physical Review Letters, 101 . [DOI] [Full-Text]
    2008 G. Kells, A. T. Bolukbasi, V. Lahtinen, J.K. Slingerland, J.K. Pachos and J. Vala (2008) 'Topological degeneracy and vortex dynamics in the Kitaev honeycomb model'. Physical Review Letters, 101 . [Full-Text]
    2007 T. Stitt, G. Kells and J. Vala (2007) 'LAW: A Tool for Improved Productivity with High-Performance Linear Algebra Codes. Design and Applications'. arxiv:0710.4896 . [Full-Text]
    2006 G. Kells, J. Twamley, D. M. Heffernan (2006) 'Stability analysis of the kicked Harper models accelerator modes'. Chaos, Solitons and Fractals, 36 . [Full-Text]
    2005 G. Kells (2005) 'Eigensolutions of the kicked Harper model'. quant-ph/0511108 .
    2004 G Kells, J Twamley, D. M. Heffernan (2004) 'Dynamical properties of the delta kicked harmonic oscillator'. 70 . [Full-Text]
    Certain data included herein are derived from the © Web of Science (2024) of Clarivate. All rights reserved.