75 citations · 342 across the 11 of their papers we have counts for
11 papers
Arbitrary qubit transformations on tuneable Rashba rings
A. Kregar, J. H. Jefferson, A. Ramsak
An exact solution is presented for the time-dependent wavefunction of a Kramers doublet which propagates around a quantum ring with tuneable Rashba spin-orbit interaction. By propa…
Exact Nonadiabatic Holonomic Transformations of Spin-Orbit Qubits
T. Cadez, J. H. Jefferson, A. Ramsak
An exact analytical solution is derived for the wavefunction of an electron in a one-dimensional moving quantum dot in a nanowire, in the presence of time-dependent spin-orbit coup…
Non-adiabatically driven electron in quantum wire with spin-orbit interaction
T. Cadez, J. H. Jefferson, A. Ramsak
An exact solution is derived for the wave function of an electron in a semiconductor quantum wire with spin-orbit interaction and driven by external time dependent harmonic confini…
Spin detection at elevated temperatures using a driven double quantum dot
G. Giavaras, J. Wabnig, B. W. Lovett +2
We consider a double quantum dot in the Pauli blockade regime interacting with a nearby single spin. We show that under microwave irradiation the average electron occupations of th…
Entanglement between static and flying qubits in a semiconducting carbon nanotube
D. Gunlycke, J. H. Jefferson, T. Rejec +3
Entanglement can be generated by two electrons in a spin-zero state on a semiconducting single-walled carbon nanotube. The two electrons, one weakly bound in a shallow well in the…
Conductance anomalies and the extended Anderson model for nearly perfect quantum wires
T. Rejec, A. Ramsak, J. H. Jefferson
Anomalies near the conductance threshold of nearly perfect semiconductor quantum wires are explained in terms of singlet and triplet resonances of conduction electrons with a singl…
Two-electron quantum dots as scalable qubits
J. H. Jefferson, M. Fearn, D. L. J. Tipton +1
We show that two electrons confined in a square semiconductor quantum dot have two isolated low-lying energy eigenstates, which have the potential to form the basis of scalable com…
Conductance anomalies in quantum wires
T. Rejec, A. Ramsak, J. H. Jefferson
We study the conductance threshold of clean nearly straight quantum wires in the magnetic field. As a quantitative example we solve exactly the scattering problem for two-electrons…
Coulomb Blockade Resonances in Quantum Wires
T. Rejec, A. Ramsak, J. H. Jefferson
The conductance through a quantum wire of cylindrical cross section and a weak bulge is solved exactly for two electrons within the Landauer-Buettiker formalism. We show that this…
Interacting electrons in polygonal quantum dots
C E Creffield, Wolfgang Haeusler, J H Jefferson +1
The low-lying eigenstates of a system of two electrons confined within a two-dimensional quantum dot with a hard polygonal boundary are obtained by means of exact diagonalization.…
Effect of deconfinement on resonant transport in quantum wires
A. Ramsak, T. Rejec, J. H. Jefferson
The effect of deconfinement due to finite band offsets on transport through quantum wires with two constrictions is investigated. It is shown that the increase in resonance linewid…