Quantum switch for single-photon transport in a coupled superconducting transmission line resonator array

摘要

We propose and study an approach to realize quantum switch for single-photontransport in a coupled superconducting transmission line resonator (TLR) arraywith one controllable hopping interaction. We find that the single-photon witharbitrary wavevector can transport in a controllable way in this system. Wealso study how to realize controllable hopping interaction between two TLRs viaa superconducting quantum interference device (SQUID). When the frequency ofthe SQUID is largely detuned from those of the two TLRs, the variables of theSQUID can be adiabatically eliminated and thus a controllable interactionbetween two TLRs can be obtained.