Propagating phonons coupled to an artificial atom
Propagating phonons coupled to an artificial atom
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DOI：
10.1126/science.1257219
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发表时间：
2014-10-10
期刊：
影响因子：
56.9
通讯作者：
Delsing, Per
中科院分区：
文献类型：
--
作者：
Gustafsson, Martin V.;Aref, Thomas;Delsing, Per
量子信息可存储在微机械谐振器中，编码为被称为声子的振动量子。然后，振动被限制在谐振器的稳态本征模式中，因此该谐振器可作为声子的本地存储器。相比之下，我们在量子体系中将传播的声子与一个人造原子耦合，并重现量子光学的研究结果，其中声音取代了光的角色。我们的研究结果凸显了声子和光子之间的相似性，但也指出了量子力学声音的特征所带来的新机遇。声子的低传播速度应能为处理量子信息提供新的动态方案，并且其短波长使得能够探索在光子系统中无法触及的原子物理领域。
Quantum information can be stored in micromechanical resonators, encoded as quanta of vibration known as phonons. The vibrational motion is then restricted to the stationary eigenmodes of the resonator, which thus serves as local storage for phonons. In contrast, we couple propagating phonons to an artificial atom in the quantum regime and reproduce findings from quantum optics, with sound taking over the role of light. Our results highlight the similarities between phonons and photons but also point to new opportunities arising from the characteristic features of quantum mechanical sound. The low propagation speed of phonons should enable new dynamic schemes for processing quantum information, and the short wavelength allows regimes of atomic physics to be explored that cannot be reached in photonic systems.