Modelling of quantum information processing with Ehrenfest guided tra jectories: a case study

Details Modelling of quantum information processing with Ehrenfest guided tra jectories: a case study Modelling of quantum information processing with Ehrenfest guided tra jectories: a case study

2012-01-30

arxiv.org/abs/1201.6171v1

Physics

Quantum Physics

12 pages, figures aplenty

Scientific paper

We apply a numerical method based on multi-configurational Ehrenfest tra jectories, and demonstrate converged results for the Choi fidelity of an entangling quantum gate between two two-level systems interacting through a set of bosonic modes. We consider both spin-boson and rotating wave Hamiltonians, for various numbers of mediating modes (from 1 to 100), and extend our treatment to include finite temperatures. Our results apply to two-level impurities interacting with the same band of a photonic crystal, or to two distant ions interacting with the same set of motional degrees of freedom.

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