Measurement-based quantum computer in the gapped ground state of a two-body Hamiltonian
Measurement-based quantum computer in the gapped ground state of a two-body Hamiltonian
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DOI：
10.1103/physrevlett.101.010502
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发表时间：
2008-07-04
影响因子：
8.6
通讯作者：
Miyake, Akimasa
中科院分区：
文献类型：
--
作者：
Brennen, Gavin K.;Miyake, Akimasa
我们提出了一种基于地面码测量的量子计算机方案，该方案具有两大优势。首先，每个逻辑量子位都被编码在具有最近邻二体相互作用的 spin-1 链的有间隙简并基子空间中，因此它具有内置的抗噪声鲁棒性。其次，计算是通过沿着按需动态耦合的多个链的单自旋测量来处理的，以便在与待测量的自旋的相互作用关闭后，仅将逻辑信息传送到剩余链的受间隙保护的基态中。我们描述了在光学晶格中使用捕获原子或极性分子的实现，其中间隙预计分别为 0.2 或 4.8 kHz。
We propose a scheme for a ground-code measurement-based quantum computer, which enjoys two major advantages. First, every logical qubit is encoded in the gapped degenerate ground subspace of a spin-1 chain with nearest-neighbor two-body interactions, so that it equips built-in robustness against noise. Second, computation is processed by single-spin measurements along multiple chains dynamically coupled on demand, so as to keep teleporting only logical information into a gap-protected ground state of the residual chains after the interactions with spins to be measured are turned off. We describe implementations using trapped atoms or polar molecules in an optical lattice, where the gap is expected to be as large as 0.2 or 4.8 kHz, respectively.