Spectroscopy on two coupled superconducting flux qubits

We have performed spectroscopy measurements on two coupled flux qubits. The qubits are coupled inductively, which results in a sigma(z)(1)sigma(z)(2) interaction. By applying microwave radiation, we observe resonances due to transitions from the ground state to the first two excited states. From the...

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Published in:Physical review letters 2005-03, Vol.94 (9), p.090501.1-090501.4, Article 090501
Main Authors: MAJER, J. B, PAAUW, F. G, TER HAAR, A. C. J, HARMANS, C. J. P. M, MOOIJ, J. E
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Physics
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description We have performed spectroscopy measurements on two coupled flux qubits. The qubits are coupled inductively, which results in a sigma(z)(1)sigma(z)(2) 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 applied magnetic field, we observe the coupling of the qubits. The coupling strength agrees with calculations of the mutual inductance.
doi_str_mv 10.1103/PhysRevLett.94.090501
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subjects Exact sciences and technology
Physics
title Spectroscopy on two coupled superconducting flux qubits
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