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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
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