Detail Symmetrized Characterization of Noisy Quantum Processes   Oleh:  Emerson, Joseph ; Silva, Marcus ; Moussa, Osama ; Ryan, Colm ; Laforest, Martin ; Baugh, Jonathan ; Cory, David G. ; Laflamme, Raymond Jenis: Article from Bulletin/Magazine Dalam koleksi: SCIENCE (keterangan: ada di Proquest) vol. 317 no. 5846 (Sep. 2007), page 1893. Ketersediaan Perpustakaan FK Nomor Panggil: S01.K.2007.08 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada     Lihat Detail Induk Isi artikel A major goal of developing high-precision control of many-body quantum systems is to realize their potential as quantum computers. A substantial obstacle to this is the extreme fragility of quantum systems to "decoherence" from environmental noise and other control limitations. Although quantum computation is possible if the noise affecting the quantum system satisfies certain conditions, existing methods for noise characterization are intractable for present multibody systems. We introduce a technique based on symmetrization that enables direct experimental measurement of some key properties of the decoherence affecting a quantum system. Our method reduces the number of experiments required from exponential to polynomial in the number of subsystems. The technique is demonstrated for the optimization of control over nuclear spins in the solid state. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Kembali

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