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Energy spectrum of a Josephson-junction qubit with an anharmonic current–phase relationship

I. N. Askerzade^ab, I. Hashimoglu<sup>c

a</sup> Computer Engineering Department and Center of Excellence of Superconductivity Research, Ankara University, 06100 Ankara, Turkey
^b Institute of Physics Azerbaijan Academy of Sciences
^c Business Administration Department, Demircelik Campus of Karabuk University, 78050 Karabuk, Turkey

Abstract: The energy spectrum of a Josephson single-junction quantum bit, qubit with an anharmonic current–phase relationship is studied. The influence of the second harmonic amplitude in the current–phase relationship on the energy difference between qubit states is analyzed.

Received: 14.11.2014

 English version: Technical Physics, 2015, 60:9, 1402–1404

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