128 citations · 298 across the 10 of their papers we have counts for
10 papers
Trapping potentials and quantum gates for microwave-dressed Rydberg atoms on an atom chip
Iason Tsiamis, Georgios Doultsinos, Andreas F. Tzortzakakis +5
Rydberg atoms in dc electric fields acquire static dipole moments. When the atoms are close to a surface producing an inhomogeneous electric field, such as by the adsorbates on an…
Qubit Analog with Polariton Superfluid in an Annular Trap
J. Barrat, A. F. Tzortzakakis, M. Niu +4
We report on the experimental realization and characterization of a qubit analog with semiconductor exciton-polaritons. In our system, a condensate of exciton-polaritons is confine…
Thermal transitions in a one-dimensional, finite-size Ising model
Varazdat Stepanyan, Andreas F. Tzortzakakis, David Petrosyan +1
We revisit the one-dimensional ferromagnetic Ising spin-chain with a finite number of spins and periodic boundaries and derive analytically and verify numerically its various stati…
Topological edge-states of the PT-symmetric Su-Schrieffer-Heeger model: An effective two-state description
A. F. Tzortzakakis, A. Katsaris, N. E. Palaiodimopoulos +4
We consider the non-Hermitian, parity-time (PT) symmetric extensions of the one-dimensional Su-Schrieffer-Heeger (SSH) model in the topological non-trivial configuration. We study…
Microscopic dynamics and an effective Landau-Zener transition in the quasi-adiabatic preparation of spatially ordered states of Rydberg excitations
A. F. Tzortzakakis, D. Petrosyan, M. Fleischhauer +1
We examine the adiabatic preparation of spatially-ordered Rydberg excitations of atoms in finite one-dimensional lattices by frequency-chirped laser pulses, as realized in a number…
Ultralong temporal coherence in optically trapped exciton-polariton condensates
K. Orfanakis, A. F. Tzortzakakis, D. Petrosyan +2
We investigate an optically trapped exciton-polariton condensate and observe temporal coherence beyond 1~ns duration. Due to the reduction of the spatial overlap with the thermal r…
Transport and spectral features in non-Hermitian open systems
A. F. Tzortzakakis, K. G. Makris, A. Szameit +1
We study the transport and spectral properties of a non-Hermitian one-dimensional disordered lattice, the diagonal matrix elements of which are random complex variables taking both…
Shape-preserving beam transmission through non-Hermitian disordered lattices
A. F. Tzortzakakis, K. G. Makris, S. Rotter +1
We investigate the propagation of Gaussian beams through optical waveguide lattices characterized by correlated non-Hermitian disorder. In the framework of coupled mode theory, we…
Josephson junctions with spin-orbit and spin-flip interactions
A. F. Tzortzakakis, N. Flytzanis
In this thesis we study short Josephson junctions which include a region with Rashba spin-orbit coupling effect. Our junctions consists of two superconductors (S) and a 2-dimension…
Non-Hermitian disorder in two-dimensional optical lattices
A. F. Tzortzakakis, K. G. Makris, E. N. Economou
In this paper, we study the properties of two-dimensional lattices in the presence of non-Hermitian disorder. In the context of coupled mode theory, we consider random gain-loss di…