Adiabatic Controlled-NOT Gate for Quantum Computation

Authors:
D. V. Averin
Affiliations:
-
Venue:
QCQC '98 Selected papers from the First NASA International Conference on Quantum Computing and Quantum Communications
Year:
1998

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Abstract

A new variant of the controlled-NOT quantum logic gate is proposed. The gate is based on adiabatic level-crossing dynamics of the q-bits. An important advantage of the adiabatic dynamics, as opposed to the ac-driven Rabi transitions, is its considerable insensitivity to the unavoidable spread of the gate parameters. The gate has a natural implementation in terms of the Cooper pair transport in arrays of small Josephson tunnel junctions. The decoherence rate for this implementation is estimated.