Projects per year
Abstract
We embed a small Josephson junction in a microwave resonator that allows simultaneous dc biasing and dispersive readout. Thermal fluctuations drive the junction into phase diffusion and induce a temperature-dependent shift in the resonance frequency. By sensing the thermal noise of a remote resistor in this manner, we demonstrate primary thermometry in the range of 300 mK to below 100 mK, and high-bandwidth (7.5 MHz) operation with a noise-equivalent temperature of better than 10 mu K/root Hz. At a finite bias voltage close to a Fiske resonance, amplification of the microwave probe signal is observed. We develop an accurate theoretical model of our device based on the theory of dynamical Coulomb blockade.
Original language | English |
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Article number | 024005 |
Pages (from-to) | 1-8 |
Number of pages | 8 |
Journal | Physical Review Applied |
Volume | 6 |
Issue number | 2 |
DOIs | |
Publication status | Published - 10 Aug 2016 |
MoE publication type | A1 Journal article-refereed |
Keywords
- TUNNEL-JUNCTION
- QUANTUM
- REFRIGERATION
- DYNAMICS
- PAIR
Projects
- 2 Finished
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Centre of Excellence in Low Temperature Quantum Phenomena and Devices
Golubev, D., Ronzani, A., Volovik, G., Viisanen, K., Westström, A., Tuoriniemi, J., Najafi Jabdaraghi, R. (., Pekola, J., Pöyhönen, K., Singh, S., Feshchenko, A. & Kauppila, V.
01/01/2015 → 31/12/2017
Project: Academy of Finland: Other research funding
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Quantum technology and materials for parallel sensor-actuator units in ICT
Pekola, J. & Saira, O.
01/01/2015 → 31/12/2016
Project: Academy of Finland: Other research funding
Equipment
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OtaNano – Low Temperature Laboratory
Pertti Hakonen (Manager)
Department of Applied PhysicsFacility/equipment: Facility
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OtaNano - Nanofab
Päivikki Repo (Manager)
School of Electrical EngineeringFacility/equipment: Facility