102 citations · 218 across the 11 of their papers we have counts for
8 papers · 1 filter
Energy and particle number fluctuations in superconducting heterostructures
Ville J. Kauppila, Matti A. Laakso, Tero T. Heikkilä
We consider fluctuations of the energy on a mesoscopic island coupled to two leads. We use the Keldysh effective action formalism to derive the Langevin equation for the energy of…
Manifestly non-Gaussian fluctuations in superconductor-normal metal tunnel nanostructures
M. A. Laakso, T. T. Heikkilä, Yuli V. Nazarov
We propose a mesoscopic setup which exhibits strong and manifestly non-Gaussian fluctuations of energy and temperature when suitably driven out of equilibrium. The setup consists o…
Theory of temperature fluctuation statistics in superconductor-normal metal tunnel structures
M. A. Laakso, T. T. Heikkilä, Yuli V. Nazarov
We describe the statistics of temperature fluctuations in a SINIS structure, where a normal metal island (N) is coupled by tunnel junctions (I) to two superconducting leads (S). We…
Giant current fluctuations in an overheated single electron transistor
M. A. Laakso, T. T. Heikkilä, Yuli V. Nazarov
Interplay of cotunneling and single-electron tunneling in a thermally isolated single-electron transistor (SET) leads to peculiar overheating effects. In particular, there is an in…
Fully Overheated Single-Electron Transistor
M. A. Laakso, T. T. Heikkilä, Yuli V. Nazarov
We consider the fully overheated single-electron transistor, where the heat balance is determined entirely by electron transfers. We find three distinct transport regimes correspon…
Physics of Proximity Josephson Sensor
Juha Voutilainen, Matti A. Laakso, Tero T. Heikkilä
We study the proximity Josephson sensor (PJS) in both bolometric and calorimetric operation and optimize it for different temperature ranges between 25 mK and a few Kelvin. We inve…
Charge transport in ballistic multiprobe graphene structures
M. A. Laakso, T. T. Heikkilä
We study the the transport properties of multiterminal ballistic graphene samples, concentrating on the conductance matrix, fluctuations and cross-correlations. Far away from Dirac…
Effective capacitance in a single-electron transistor
M. A. Laakso, T. Ojanen, T. T. Heikkila
Starting from the Kubo formula for conductance, we calculate the frequency-dependent response of a single-electron transistor (SET) driven by an ac signal. Treating tunneling proce…