Engineering entanglement: The fast-approach phase gate

Dan Vager, Bilha Segev, Y. B. Band

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Optimal-control techniques and a fast-approach scheme are used to implement a collisional controlled-phase gate in a model of cold atoms in an optical lattice, significantly reducing the gate time as compared to adiabatic evolution while maintaining high fidelity. Objective functionals are given for which optimal paths are obtained for evolution that yields a controlled-phase gate up to single-atom Rabi shifts. Furthermore, the fast-approach procedure is used to design a path to significantly increase the fidelity of nonadiabatic transport in a recent experiment. In addition, the entanglement power of phase gates is quantified.

Original languageEnglish
Article number022325
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume72
Issue number2
DOIs
StatePublished - 1 Aug 2005

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