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Controlled phase gate for solid-state charge-qubit architectures

Schirmer, S G and Oi, D K L and Greentree, A D (2005) Controlled phase gate for solid-state charge-qubit architectures. Physical Review A, 71 (1). -. ISSN 1094-1622

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Abstract

We describe a mechanism for realizing a controlled phase gate for solid-state charge qubits. By augmenting the positionally defined qubit with an auxiliary state, and changing the charge distribution in the three-dot system, we are able to effectively switch the Coulombic interaction, effecting an entangling gate. We consider two architectures, and numerically investigate their robustness to gate noise.