Dublin Institute for Advanced Studies contact@dias.ie 00353 (0) 16140100

Dr. Graham Kells

Contact

email: gkells@stp.dias.ie
phone: 01 – 6140135
address: Rm. 405, DIAS, 10 Burlington Rd, D04 C932.

Group Webpage

Biography

I am interested in complex quantum phenomena and most of my research to date has centered on topological band-structures and their potential usefulness for quantum information processing. In this context I have focused primarily on superconducting nanowires, 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. Currently I am examining what are called strong-zero modes, and the possibility that they can be enhanced to robustly store quantum information at high temperatures.

Recent Publications

Selected Publications

Error generation and propagation in Majorana-based topological qubits
A. Conlon, D. Pellegrino, J. K. Slingerland, S. Dooley, and G. Kells, Phys. Rev. B 100, 134307 (2019)

Localisation enhanced and degraded topological order in interacting p-wave wires
G. Kells, N. Moran, and D. Meidan, Phys. Rev. B 97, 085425 (2018)

Many body Majoranas and the equivalence of parity sectors
G. Kells, Phys. Rev. B 92 081401(R) (2015)

Topological Blocking in Quantum Quench Dynamics
G. Kells, D. Sen, J. K. Slingerland and S. Vishweshwara, Phys. Rev. B, 89, 235130 (2014)

Near-zero-energy end-states in topologically trivial spin-orbit coupled superconducting nanowires with smooth confinement.
G. Kells, D. Meidan, and P. W. Brouwer , Phys. Rev. B 86, 100503(R) (2012)

Low-energy sub-gap states in multi-channel p-wave superconducting wires
G. Kells, D. Meidan and P. W. Brouwer Phys. Rev. B 85, 060507(R) (2012)

Exact results on the star lattice chiral spin liquid
G. Kells, D. Mehta, J.K. Slingerland and J. Vala Phys. Rev. B 81, 104429 (2010)

A description of Kitaev’s honeycomb model with toric-code stabilizers
G. Kells, J. K. Slingerland and J. Vala., Phys. Rev. B 80, 125415 (2009)