An unconventional geometric phase gate with two nonresonant quantum dots trapped in a photonic crystal cavity

Details An unconventional geometric phase gate with two nonresonant quantum dots trapped in a photonic crystal cavity An unconventional geometric phase gate with two nonresonant quantum dots trapped in a photonic crystal cavity

2010-11-28

arxiv.org/abs/1011.6009v5

JOSA B, Vol. 28, Issue 8, pp. 1959-1963 (2011)

Physics

Quantum Physics

14 pages, 3 figure

Scientific paper

10.1364/JOSAB.28.001959

We propose a scheme for realizing a two-qubit controlled phase gate via an unconventional geometric phase with two nonresonant quantum dots trapped in a photonic crystal cavity. In this system, the quantum dots simultaneously interact with a large detuned cavity mode and strong driving classical light fields. During the gate operation, the quantum dots undergo no transitions, while the cavity mode is displaced along a closed path in the phase space. In this way, the system can acquire geometric phases conditional upon the states of the quantum dots. After implementing single-qubit operations, a two-qubit controlled phase gate can be constructed.

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