Three- and four-body interactions in spin-based quantum computers.
Three- and four-body interactions in spin-based quantum computers.
复制标题
基于自旋的量子计算机中的三体和四体相互作用。
DOI：
10.1103/physrevlett.92.077903
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发表时间：
2004
影响因子：
8.6
通讯作者：
Daniel A. Lidar
中科院分区：
文献类型：
--
作者：
Ari Mizel;Daniel A. Lidar
在设计和构建量子计算机的努力中，几个领先的提议利用了基于自旋的量子比特。这些设计通常假设自旋经历成对的相互作用。我们指出，当几个自旋相互从事成对相互作用，相互作用的定量强度可以改变和定性新的条款可以出现在哈密顿量，包括四体相互作用。在实验感兴趣的参数制度，这些相干效应是大到足以干扰计算，并可能需要新的误差校正或避免技术。
In the effort to design and to construct a quantum computer, several leading proposals make use of spin-based qubits. These designs generally assume that spins undergo pairwise interactions. We point out that, when several spins are engaged mutually in pairwise interactions, the quantitative strengths of the interactions can change and qualitatively new terms can arise in the Hamiltonian, including four-body interactions. In parameter regimes of experimental interest, these coherent effects are large enough to interfere with computation and may require new error correction or avoidance techniques.