Dr. Georgios M. Nikolopoulos
Institute of Electronic Structure and Laser, Foundation of Research and Technology Hellas
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Academic Career Length
28Years (1999-Present)
(Calculated once Scilit publication data is synced: current year − year of first publication + 1)
Representative Publications
View All Publications10 March 2000 in Reports on Progress in Physics
Journal Article
PLP Lambropoulos
P Lambropoulos
Georgios M. NikolopoulosTNTorben R Nielsen
Torben R Nielsen
SBSøren Bay
Søren Bay
2 July 2004 in Journal of Physics: Condensed Matter
Journal Article
Georgios M. Nikolopoulos
David PetrosyanPLP Lambropoulos
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 phenomena, ranging from electron wavepacket propagation and interference to two-particle bonding and entanglement. Our studies, apart from their relevance to the exploratio no fquantum dynamics and transport in periodic structures, are also aimed at possible applications in future quantum computation schemes. (Some figures in this article are in colour only in the electronic version)
1 February 2004 in Europhysics Letters
Journal Article
Georgios M. NikolopoulosDavid PetrosyanPLP Lambropoulos
P Lambropoulos
We studythe dy namics of single-electron transport in a linear arrayof tunnel- coupled quantum dots. We show that this system can serve as an ideal quantum channel, enabling a controlled transport and entanglement of electrons in a large-scale integrated quan- tum computer.
26 October 2012 in Optics Letters
Journal Article
MBMatthieu Bellec
Matthieu Bellec
Georgios M. Nikolopoulos
Stelios TzortzakisFaithful communication is a necessary precondition for large scale all-optical networking and quantum information processing. Related theoretical investigations in different areas of physics have led to various proposals in which finite discrete lattices are used as channels for short-distance communication tasks. Here, in the framework of femtosecond-laser-written waveguide arrays, we present the first experimental realization of such a channel with judiciously engineered couplings.
28 March 2008 in Physical Review A
Journal Article
Georgios M. NikolopoulosWe discuss cryptographic applications of single-qubit rotations from the perspective of trapdoor one-way functions and public-key encryption. In particular, we present an asymmetric cryptosystem whose security relies on fundamental principles of quantum physics. A quantum public key is used for the encryption of messages while decryption is possible by means of a classical private key only. The trapdoor one-way function underlying the proposed cryptosystem maps integer numbers to quantum states of a qubit and its inversion can be infeasible by virtue of the Holevo’s theorem.
14 April 2010 in Physical Review A
Journal Article
David PetrosyanGeorgios M. NikolopoulosPLP. Lambropoulos
P. Lambropoulos
We examine the speed and fidelity of several protocols for state or single excitation transfer in finite spin chains subject to diagonal and off-diagonal disorder. We find that, for a given chain length and maximal achievable interspin exchange (XY) coupling strength, the optimal static spin-coupling protocol, implementing the fastest state transfer between the two ends of the chain, is more susceptible to off-diagonal (XY coupling) disorder, as compared to a much slower but robust adiabatic transfer protocol with time-dependent coupling strengths.
About Me
Dr. Georgios Nikolopoulos received his PhD in 2001 from the University of Crete. His PhD work was focused on the dissipative dynamics of small quantum systems, which are coupled to continua that exhibit an unconventional density of states and do not allow for standard (e.g., Born and Markov) approximations. In 2003, after his military service, he moved to TU Darmstadt where he worked as a research associate in the framework of FP6 IP SECOQC project, which focused on the development of a global network for secure communication based on quantum cryptography. Dr. Nikolopoulos joined IESL/FORTH as a Junior Researcher in 2007, and his research activities span a broad range of topics including quantum linear and non-linear optics, quantum communication, quantum cryptography, and ultracold quantum gases.