278 citations · 572 across the 11 of their papers we have counts for
4 papers · 1 filter
Non-adiabatic charge state transitions in singlet-triplet qubits
Tuukka Hiltunen, Juha Ritala, Topi Siro +1
In double quantum dot singlet-triplet qubits, the exchange interaction is used in both quantum gate operation and the measurement of the state of the qubit. The exchange can be con…
Enhancement models of momentum densities of annihilating electron-positron pairs: the many-body picture of natural geminals
Ilja Makkonen, Mikko M. Ervasti, Topi Siro +1
The correlated motion of a positron surrounded by electrons is a fundamental many-body problem. We approach this by modeling the momentum density of annihilating electron-positron…
Efficient linear-scaling quantum transport calculations on graphics processing units and applications on electron transport in graphene
Zheyong Fan, Andreas Uppstu, Topi Siro +1
We implement, optimize, and validate the linear-scaling Kubo-Greenwood quantum transport simulation on graphics processing units by examining resonant scattering in graphene. We co…
Lagrange mesh and exact diagonalization for numerical study of semiconductor quantum dot systems with application in singlet-triplet qubits
Tuukka Hiltunen, Juha Ritala, Oona Kupiainen +2
We present a highly flexible computational scheme for studying correlated electrons confined by an arbitrary external potential in two-dimensional semiconductor quantum dots. The m…