130 citations · 195 across the 3 of their papers we have counts for
4 papers · 1 filter
Security bound of two-bases quantum key-distribution protocols using qudits
Georgios M. Nikolopoulos, Gernot Alber
We investigate the security bounds of quantum cryptographic protocols using -level systems. In particular, we focus on schemes that use two mutually unbiased bases, thus extendi…
Robustness of the BB84 quantum key distribution protocol against general coherent attacks
Georgios M. Nikolopoulos, Gernot Alber
It is demonstrated that for the entanglement-based version of the Bennett-Brassard (BB84) quantum key distribution protocol, Alice and Bob share provable entanglement if and only i…
Electron wavepacket propagation and entanglement in a chain of coupled quantum dots
G. M. Nikolopoulos, D. Petrosyan, P. Lambropoulos
We study the coherent dynamics of one- and two-electron transport in a linear array of tunnel-coupled quantum dots. We find that this system exhibits a rich variety of coherent phe…
Beyond single-photon localization at the edge of a Photonic Band Gap
Georgios M. Nikolopoulos, P. Lambropoulos
We study spontaneous emission in an atomic ladder system, with both transitions coupled near-resonantly to the edge of a photonic band gap continuum. The problem is solved through…