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16 papers · 1 filter
Dissipation-induced quantum phase transition in a quantum box
L. Borda, G. Zarand, P. Simon
In a recent work, Le Hur has shown that dissipative coupling to gate electrodes may play an important role in a quantum box near its degeneracy point [K. Le Hur, Phys. Rev. Lett. {…
Modified Spin-Wave Theory for Nanomagnets : Application to the Keplerate Molecule Mo(72)Fe(30)
Olivier Cepas, Timothy Ziman
We adapt Takahashi's modified spin-wave theory to the context of nano-magnets, and apply it to the molecular compound based on the giant magnetic molecule Mo(72)Fe(30). This involv…
Large energy dependence of current noise in superconducting/normal metal junctions
F. Pistolesi, M. Houzet
Interference of electronic waves undergoing Andreev reflection in diffusive conductors determines the energy profile of the conductance on the scale of the Thouless energy. A simil…
The charge shuttle as a nanomechanical ratchet
F. Pistolesi, Rosario Fazio
We consider the charge shuttle proposed by Gorelik {\em et al.} driven by a time-dependent voltage bias. In the case of asymmetric setup, the system behaves as a rachet. For pure A…
Microwave photoconductivity of two-dimensional electron systems with unidirectional periodic modulation
J. Dietel, L. Glazman, F. Hekking +1
Motivated by the recently discovered microwave-induced ``zero-resistance'' states in two-dimensional electron systems, we study the microwave photoconductivity of a two-dimensional…
Exotic Kondo effect from magnetic trimers
Bence Lazarovits, Pascal Simon, Gergely Zarand +1
Motivated by the recent experiments of Jamneala {\em et al.} [T. Jamnaela {\em et al.}, Phys. Rev. Lett. {\bf 87}, 256804 (2001)], by combining {\em ab-initio} and renormalization…