Spectroscopy on two coupled flux qubits

Abstract

We have performed spectroscopy measurements on two coupled flux qubits. The qubits are coupled inductively, which results in a ${\sigma }_1^z{\sigma }_2^z$ interaction. By applying microwave radiation, we observe resonances due to transitions from the ground state to the first two excited states. From the position of these resonances as a function of the magnetic field applied we observe the coupling of the qubits. The coupling strength agrees well with calculations of the mutual inductance.

References in corpus (6)

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• Manipulating the Quantum State of an Electrical Circuit
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• A Superconducting Persistent Current Qubit
• Quantum oscillations in two coupled charge qubits
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