Geometric phase gate based on the ac Stark shift
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We present an alternate derivation of the geometric phase gate based on the ac Stark shift for two qubits coupled to a shared cavity mode. Our derivation differs from the standard one in that the qubit-light coupling occurs purely as an ac Stark shift, rather than a state-dependent force. We derive expressions for the geometric phases induced on the qubit states arising from the displacement of coherent light. Simple analytic expressions are obtained for sinusodial driving of the cavity field.
Quantum Information Processing
Copyright 2015 Springer Netherlands. This is an electronic version of an article published in Quantum Information Processing, Vol. 14, pp. 943-950, 2015. Quantum Information Processing is available online at: http://link.springer.com/ with the open URL of your article
Quantum Information, Computation and Communication