67 citations · 441 across the 23 of their papers we have counts for
4 papers · 1 filter
Characterising superconducting filters using residual microwave background
J. S. Lehtinen, E. Mykkänen, A. Kemppinen +3
A normal metal - superconductor hybrid single-electron trap with tunable barrier is utilized as a tool for spectrum analysis at the extremely low signal levels, using only well fil…
Reducing current noise in cryogenic experiments by vacuum-insulated cables
E. Mykkänen, J. S. Lehtinen, A. Kemppinen +4
We measure the current noise of several cryogenic cables in a pulse tube based dilution refrigerator at frequencies between about 1~mHz and 50~kHz. We show that vibration-induced n…
The quantum phase slip phenomenon in superconducting nanowires with high-impedance environment
K. Yu. Arutyunov, J. S. Lehtinen, T. Rantala
Quantum phase slip (QPS) is the particular manifestation of quantum fluctuations of the order parameter of a current-biased quasi-1D superconductor. The QPS event(s) can be conside…
Junctionless Cooper pair transistor
K. Yu. Arutyunov, J. S. Lehtinen
Quantum phase slip (QPS) is the topological singularity of the complex order parameter of a quasi-one-dimensional superconductor: momentary zeroing of the modulus and simultaneous…