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arXiv 0705.0788quant-ph
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单量子水平上连续变量的非线性耦合

Nonlinear coupling of continuous variables at the single quantum level

C. F. Roos, T. Monz, K. Kim, M. Riebe, H. Haeffner, D. F. V. James, R. Blatt

摘要:

我们实验研究了储存在线性离子阱中的冷离子弦振动模式之间的非线性耦合。这种非线性是由离子的库仑相互作用引起的,并产生一个克尔型相互作用哈密顿量H = n_r*n_s,其中n_r,n_s是两个相互作用振动模的声子数算符。我们精确地测量所产生的振荡频率偏移,并观察在拉姆齐实验中的对比度的崩溃和复苏。讨论了离子阱实验对高保真度量子门操作的影响。

英文摘要:

We experimentally investigate nonlinear couplings between vibrational modes of strings of cold ions stored in linear ion traps. The nonlinearity is caused by the ions' Coulomb interaction and gives rise to a Kerr-type interaction Hamiltonian H = n_r*n_s, where n_r,n_s are phonon number operators of two interacting vibrational modes. We precisely measure the resulting oscillation frequency shift and observe a collapse and revival of the contrast in a Ramsey experiment. Implications for ion trap experiments aiming at high-fidelity quantum gate operations are discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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