Dispersive Thermometry with a Josephson Junction Coupled to a Resonator

O. -P. Saira; M. Zgirski; K. L. Viisanen; D. S. Golubev; J. P. Pekola

doi:10.1103/PhysRevApplied.6.024005

Dispersive Thermometry with a Josephson Junction Coupled to a Resonator

O. -P. Saira^*, M. Zgirski, K. L. Viisanen, D. S. Golubev, J. P. Pekola

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

24 Citations (Scopus)

277 Downloads (Pure)

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
Article number	024005
Pages (from-to)	1-8
Number of pages	8
Journal	Physical Review Applied
Volume	6
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevApplied.6.024005
Publication status	Published - 10 Aug 2016
MoE publication type	A1 Journal article-refereed

Keywords

TUNNEL-JUNCTION
QUANTUM
REFRIGERATION
DYNAMICS
PAIR

Access to Document

10.1103/PhysRevApplied.6.024005

PhysRevApplied.6Final published version, 662 KB

Projects

2 Finished

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

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., Senior, J., Pöyhönen, K., Singh, S., Feshchenko, A. & Kauppila, V.

01/01/2015 → 31/12/2018

Project: Academy of Finland: Other research funding

Equipment

OtaNano

Anna Rissanen (Manager)

Aalto University

Facility/equipment: Facility

OtaNano – Low Temperature Laboratory

Pertti Hakonen (Manager)

Department of Applied Physics

Facility/equipment: Facility

OtaNano - Nanofab

Päivikki Repo (Manager)

School of Electrical Engineering

Facility/equipment: Facility

Cite this

Saira, O. -P., Zgirski, M., Viisanen, K. L., Golubev, D. S., & Pekola, J. P. (2016). Dispersive Thermometry with a Josephson Junction Coupled to a Resonator. Physical Review Applied, 6(2), 1-8. [024005]. https://doi.org/10.1103/PhysRevApplied.6.024005

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