95 citations · 209 across the 4 of their papers we have counts for
4 papers
Brownian refrigeration by hybrid tunnel junctions
J. T. Peltonen, M. Helle, A. V. Timofeev +3
Voltage fluctuations generated in a hot resistor can cause extraction of heat from a colder normal metal electrode of a hybrid tunnel junction between a normal metal and a supercon…
Strong gate coupling of high-Q nanomechanical resonators
Jaakko Sulkko, Mika A. Sillanpää, Pasi Häkkinen +5
The detection of mechanical vibrations near the quantum limit is a formidable challenge since the displacement becomes vanishingly small when the number of phonon quanta tends towa…
Electronic Refrigeration at the Quantum Limit
Andrey V. Timofeev, Meri Helle, Matthias Meschke +2
We demonstrate quantum limited electronic refrigeration of a metallic island in a low temperature micro-circuit. We show that matching the impedance of the circuit enables refriger…
Two-electron lateral quantum-dot molecules in a magnetic field
M. Helle, A. Harju, R. M. Nieminen
Laterally coupled quantum dot molecules are studied using exact diagonalization techniques. We examine the two-electron singlet-triplet energy difference as a function of magnetic…