Effect of voltage bias on the dc SQUID characteristics

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)

Abstract

The dynamics of the dc SQUID, when voltage biased through an inductor, is computed by numerical simulation and by perturbative analytical calculation. We find that the dynamic resistance decreases from its current-biased value at low bias voltages, where the inductive series reactance no longer separates the Josephson voltage oscillation from the bias source. The flux-to-current conversion ratio, however, remains almost unaffected. This effect is sometimes important in setups, where a second SQUID is used as a readout amplifier.
Original languageEnglish
Pages (from-to)127-136
Number of pages10
JournalJournal of Low Temperature Physics
Volume123
Issue number1-2
DOIs
Publication statusPublished - 2001
MoE publication typeA1 Journal article-refereed

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SQUIDs
Bias voltage
Electric potential
electric potential
reactance
inductors
Fluxes
readout
Computer simulation
amplifiers
oscillations
simulation

Cite this

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title = "Effect of voltage bias on the dc SQUID characteristics",
abstract = "The dynamics of the dc SQUID, when voltage biased through an inductor, is computed by numerical simulation and by perturbative analytical calculation. We find that the dynamic resistance decreases from its current-biased value at low bias voltages, where the inductive series reactance no longer separates the Josephson voltage oscillation from the bias source. The flux-to-current conversion ratio, however, remains almost unaffected. This effect is sometimes important in setups, where a second SQUID is used as a readout amplifier.",
author = "Mikko Kiviranta and Heikki Sepp{\"a}",
year = "2001",
doi = "10.1023/A:1017549632586",
language = "English",
volume = "123",
pages = "127--136",
journal = "Journal of Low Temperature Physics",
issn = "0022-2291",
publisher = "Springer",
number = "1-2",

}

Effect of voltage bias on the dc SQUID characteristics. / Kiviranta, Mikko; Seppä, Heikki.

In: Journal of Low Temperature Physics, Vol. 123, No. 1-2, 2001, p. 127-136.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Effect of voltage bias on the dc SQUID characteristics

AU - Kiviranta, Mikko

AU - Seppä, Heikki

PY - 2001

Y1 - 2001

N2 - The dynamics of the dc SQUID, when voltage biased through an inductor, is computed by numerical simulation and by perturbative analytical calculation. We find that the dynamic resistance decreases from its current-biased value at low bias voltages, where the inductive series reactance no longer separates the Josephson voltage oscillation from the bias source. The flux-to-current conversion ratio, however, remains almost unaffected. This effect is sometimes important in setups, where a second SQUID is used as a readout amplifier.

AB - The dynamics of the dc SQUID, when voltage biased through an inductor, is computed by numerical simulation and by perturbative analytical calculation. We find that the dynamic resistance decreases from its current-biased value at low bias voltages, where the inductive series reactance no longer separates the Josephson voltage oscillation from the bias source. The flux-to-current conversion ratio, however, remains almost unaffected. This effect is sometimes important in setups, where a second SQUID is used as a readout amplifier.

U2 - 10.1023/A:1017549632586

DO - 10.1023/A:1017549632586

M3 - Article

VL - 123

SP - 127

EP - 136

JO - Journal of Low Temperature Physics

JF - Journal of Low Temperature Physics

SN - 0022-2291

IS - 1-2

ER -