Ratchet potential in superconducting
TheperiodiceffectivepotentialofasuperconductingquantuminterferencedevicecontaininganunderdampedJosephsonjunctioninthefirstbranchandadouble-barrierjunctioninthesecondisstudied.Aneffectivenon-sinusoidalexpressionforthecurrent–phaserelationwithanadditionalhalfharmonictermisusedforthedouble-
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