Thursday, December 27, 2012

1212.6181 (Mun Dae Kim)

A circuit QED architecture with current-biased flux qubits    [PDF]

Mun Dae Kim
We theoretically study a circuit quantum electrodynamics (QED) architecture with current-biased flux qubits. The qubit is coupled to the transmission line resonator by a bias current originating from the current mode of the resonator. Ultrastrong coupling regime can be obtained by varying the capacitance between the qubit and the resonator. We propose a scalable design for the circuit QED with current-biased flux qubits, where the dc-SQUIDs take the role of switching the qubit-resonator coupling. An exact calculation on two-qubit coupling strength in the scalable design shows the transition from ferromagnetic to antiferromagnetic xy-type interaction.
View original: http://arxiv.org/abs/1212.6181

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