The spin degree of freedom of an electron or a nucleus is one of the most basic properties of
nature and functions as an excellent qubit, as it provides a natural two-level system that is …

Engineered, highly controllable quantum systems are promising simulators of emergent
physics beyond the simulation capabilities of classical computers. An important problem in …

We have developed nanoscale double-gated field-effect-transistors for the study of electron
states and transport properties of single deliberately implanted phosphorus donors. The …

We study exchange coupling in Si double quantum dots, which have been proposed as
suitable candidates for spin qubits due to their long spin coherence times. We discuss in …

Electron spins confined in semiconductor quantum dots (QDs) are one of potential
candidates for physical implementation of scalable quantum information processing …

We present an experiment for education which demonstrates random transmission or
reflection of heralded single photons on beam splitters. With our set-up, we can realize …

We employ density functional calculated eigenstates as a basis for exact diagonalization
studies of semiconductor double quantum dots, with two electrons, through the transition …

We analyze experimentally and theoretically the transport spectra of a gated lateral GaAs
double quantum dot containing two holes. The strong spin-orbit interaction present in the …

c-plane GaN/AlN quantum dots (QDs) are promising zero-dimensional quantum
nanostructures that exhibit single photon emission properties up to room temperature and …

We investigate the time evolution of a Gaussian wave packet (GWP) in a tight-binding chain
with a uniform nearest-neighbor hopping integral. Analytical investigations and numerical …