Coupling of Josephson current qubits using a connecting loop

Preprint

17 November 2003

preprint
Published by arXiv in arXiv

Abstract

We propose a new coupling scheme for the three Josephson junction qubits which uses a connecting loop, but not mutual inductance. Present scheme offers the advantages of a large and tunable level splitting in implementing the controlled-NOT operation. We calculate the coupling strength as a function of the coupling energy of the Josephson junction and the length of the connecting loop which varies with selecting two qubits from the scalable design.

Keywords

JOSEPHSON JUNCTION
QUBITS WHICH USES
USES A CONNECTING
JOSEPHSON CURRENT
COUPLING SCHEME
CONNECTING LOOP
CURRENT QUBITS

All Related Versions

Version 1, 2003-05-07, ArXiv
Version 2, 2003-11-17, ArXiv
Version 3, 2004-09-24, ArXiv
Published version: Physical Review B, 70 (18), 184525.

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