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

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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

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10.1103/PhysRevApplied.6.024005

PhysRevApplied.6Final published version, 662 KB

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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
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

OtaNano
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Aalto University
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OtaNano – Low Temperature Laboratory
Pertti Hakonen (Manager)
Department of Applied Physics
Facility/equipment: Facility
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Päivikki Repo (Manager)
School of Electrical Engineering
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Cite this

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title = "Dispersive Thermometry with a Josephson Junction Coupled to a Resonator",

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.",

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author = "Saira, {O. -P.} and M. Zgirski and Viisanen, {K. L.} and Golubev, {D. S.} and Pekola, {J. P.}",

year = "2016",

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doi = "10.1103/PhysRevApplied.6.024005",

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AU - Saira, O. -P.

AU - Zgirski, M.

AU - Viisanen, K. L.

AU - Golubev, D. S.

AU - Pekola, J. P.

PY - 2016/8/10

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N2 - 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.

AB - 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.

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KW - QUANTUM

KW - REFRIGERATION

KW - DYNAMICS

KW - PAIR

U2 - 10.1103/PhysRevApplied.6.024005

DO - 10.1103/PhysRevApplied.6.024005

M3 - Article

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SP - 1

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JO - Physical Review Applied

JF - Physical Review Applied

SN - 2331-7019

IS - 2

M1 - 024005

ER -

Dispersive Thermometry with a Josephson Junction Coupled to a Resonator

Abstract

Keywords

Access to Document

Centre of Excellence in Low Temperature Quantum Phenomena and Devices

Quantum technology and materials for parallel sensor-actuator units in ICT

OtaNano

OtaNano – Low Temperature Laboratory

OtaNano - Nanofab

Cite this