44 citations · 248 across the 16 of their papers we have counts for
16 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…
Thermal entanglement in a triple quantum dot system
M. Urbaniak, S. B. Tooski, A. Ramsak +1
We present studies of thermal entanglement of a three-spin system in triangular symmetry. Spin correlations are described within an effective Heisenberg Hamiltonian, derived from t…
Geometric analysis of entangled qubit pairs
A. Ramsak
Two entangled electron spins, or qubits, are analyzed in terms of ordinary three-dimensional space geometric properties, as are the angles between their angular momenta. This formu…
Spin qubits in double quantum dots - entanglement versus the Kondo effect
A. Ramsak, J. Mravlje, R. Zitko +1
We investigate the competition between pair entanglement of two spin qubits in double quantum dots attached to leads with various topologies and the separate entanglement of each s…
Spin-fluctuation mechanism of superconductivity
A. Ramsak, P. Prelovsek
Normal and superconducting state spectral properties of cuprates are theoretically described within the extended t-J model. The method is based on the equations of motion for proje…