2007/08/31 by I. E. Linington, Nikolay V. Vitanov, N. V. Vitanov
Computer Science · Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum Information and Cryptography #Quantum Mechanics and Applications #quant-ph
paper · pdf · doi:10.1103/physreva.77.010302
published as Phys. Rev. A 77, 010302(R) (2008) · 5 pages, 4 figures. Minor changes. Journal Ref Added
openalex publication_date 2008/01/28 · arxiv created 2008/05/22 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We propose a technique for the creation of maximally entangled symmetric Dicke states in an ion trap using adiabatic passage, which requires only a pair of chirped pulses from a single laser and is applicable to any number of ions and excitations. By utilizing a particular factorization of the Hilbert space for multilevel ladders we show that the problem can be reduced to ``bow-tie''-configuration energy-level crossings. This technique is naturally robust against fluctuations in the laser intensity and the chirp rate. Even when realistic heating rates are considered, we estimate that the overall fidelity should remain high (e.g., 98% for a ten-ion Dicke state), which represents a significant improvement over traditional approaches.