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Dr Graham Kells

Name: Graham Kells

Title(s): Dr.

E-Mail: gkells@stp.dias.ie

Phone: 01 – 6140135

Address: Rm 305, DIAS, 10 Burlington Rd, Dublin 4

Research Interests: Topological Condensed Matter, Superconductivity and spin-models, Quantum Computation

Biographical Sketch

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.

Selected Publications

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)