Switchable ultrastrong coupling in circuit QED

Switchable ultrastrong coupling in circuit QED

We propose different designs of switchable coupling between a superconducting flux qubit and a microwave transmission line. They are based on two or more loops of Josephson junctions which are directly connected to a closed (cavity) or open transmission line. In both cases the circuit induces a coup...

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Veröffentlicht in:Physical review letters 2010-07, Vol.105 (2), p.023601-023601, Article 023601
Hauptverfasser: Peropadre, B, Forn-Díaz, P, Solano, E, García-Ripoll, J J
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Forn-Díaz, P
Solano, E
García-Ripoll, J J
description We propose different designs of switchable coupling between a superconducting flux qubit and a microwave transmission line. They are based on two or more loops of Josephson junctions which are directly connected to a closed (cavity) or open transmission line. In both cases the circuit induces a coupling that can be modulated in strength, reaching the so-called ultrastrong coupling regime in which the coupling is comparable to the qubit and photon frequencies. Furthermore, we suggest a wide set of applications for the introduced architectures.
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title Switchable ultrastrong coupling in circuit QED
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