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Table 1 Our convention for the frequencies involved in mixing effects

From: Negative-resistance models for parametrically flux-pumped superconducting quantum interference devices

(Angular) frequency

Designation

Relation

ω 1

“signal”

ω 1

ω 2

“idler” (three-wave difference)

ω 3 ω 1

ω 3

“pump”

ω 3

ω 4

“idler” (three-wave sum)

ω 3 + ω 1

ω 5

“idler” (four-wave difference)

2 ω 3 ω 1

ω 6

“idler” (four-wave sum)

2 ω 3 + ω 1