2008/10/24 by K. J. Xu, Xu, K. J., Y. P. Huang +5
Physics and Astronomy · #FOS: Physical sciences #Other Condensed Matter (cond-mat.other) #Quantum Physics (quant-ph) #cond-mat.other #quant-ph
paper · pdf · doi:10.48550/arxiv.0810.4489
arxiv created 2008/10/24 · arxiv updated 2009/12/01
We propose a scheme for a two-qubit conditional phase gate by quantum Zeno effect with semiconductor quantum dots. The system consists of two charged dots and one ancillary dot that can perform Rabi oscillations under a resonant laser pulse. The quantum Zeno effect is induced by phonon-assisted exciton relaxation between the ancillary dot and the charged dots, which is equivalent to a continuous measurement. We solve analytically the master equation and simulate the dynamics of the system using a realistic set of parameters. In contrast to standard schemes, larger phonon relaxation rates increase the fidelity of the operations.