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22 papers · 1 filter
Kondo Impurity in a Mesoscopic Ring: Charge Persistent Current
H. -P. Eckle, H. Johannesson, C. A. Stafford
We study the influence of a magnetic impurity or ultrasmall quantum dot on the charge persistent current of a mesoscopic ring. The system consists of electrons in a one-dimensional…
Arrays of Josephson junctions in an environment with vanishing impedance
M. Aunola, J. J. Toppari, J. P. Pekola
The Hamiltonian operator for an unbiased array of Josephson junctions with gate voltages is constructed when only Cooper pair tunnelling and charging effects are taken into account…
Effect of the electromagnetic environment on arrays of small normal metal tunnel junctions: Numerical and experimental investigation
Sh. Farhangfar, A. J. Manninen, J. P. Pekola
We present results of a set of experiments to investigate the effect of dissipative external electromagnetic environment on tunneling in linear arrays of junctions in the weak tunn…
One and two dimensional tunnel junction arrays in weak Coulomb blockade regime-absolute accuracy in thermometry
J. P. Pekola, L. J. Taskinen, Sh. Farhangfar
We have investigated one and two dimensional (1D and 2D) arrays of tunnel junctions in partial Coulomb blockade regime. The absolute accuracy of the Coulomb blockade thermometer is…
Photoelectron spectra of aluminum cluster anions: Temperature effects and ab initio simulations
Jaakko Akola, Matti Manninen, Hannu Hakkinen +3
Photoelectron (PES) spectra from aluminum cluster anions (from 12 to 15 atoms) at various temperature regimes, were studied using ab-initio molecular dynamics simulations and exper…
Scaling of transverse energies and multiplicities with atomic number and energy in ultrarelativistic nuclear collisions
K. J. Eskola, K. Kajantie, P. V. Ruuskanen +1
We compute how the initial energy density and produced gluon, quark and antiquark numbers scale with atomic number and beam energy in ultrarelativistic heavy ion collisions. The co…