Coherent-state storage and retrieval between superconducting cavities using parametric frequency conversion
Coherent-state storage and retrieval between superconducting cavities using parametric frequency conversion
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DOI：
10.1063/1.4919759
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发表时间：
2015-03
影响因子：
4
通讯作者：
A. Sirois;M. Castellanos-Beltran;M. Defeo;L. Ranzani;F. Lecocq;R. Simmonds;J. Teufel;J. Aumentado
中科院分区：
文献类型：
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作者：
A. Sirois;M. Castellanos-Beltran;M. Defeo;L. Ranzani;F. Lecocq;R. Simmonds;J. Teufel;J. Aumentado
在超导量子信息中，加工的铝超导腔已被证明是量子电路（如量子比特）的良好控制，低耗散电磁环境。它们可以拥有很大的内部品质因数，Qint > 108，并且有可能存储量子信息的时间远远超过微制造电路的时间。然而，为了用作存储元件，这些腔需要快速的“读/写”机制-换句话说，它们需要在其他感兴趣的系统（例如其他腔模式和量子位）以及任何相关的读出硬件之间的可调谐耦合。在这项工作中，我们证明了这些品质在一个简单的双腔架构中，低Q值的“读出”模式参数耦合到高Q值的“存储”模式，使我们能够存储和检索经典信息。具体来说，我们采用磁通驱动约瑟夫森结耦合方案，可控地交换两个腔之间的相干态，演示…
In superconducting quantum information, machined aluminum superconducting cavities have proven to be a well-controlled, low-dissipation electromagnetic environment for quantum circuits such as qubits. They can possess large internal quality factors, Qint > 108, and present the possibility of storing quantum information for times far exceeding those of microfabricated circuits. However, in order to be useful as a storage element, these cavities require a fast “read/write” mechanism—in other words, they require tunable coupling between other systems of interest such as other cavity modes and qubits, as well as any associated readout hardware. In this work, we demonstrate these qualities in a simple dual cavity architecture in which a low-Q “readout” mode is parametrically coupled to a high-Q “storage” mode, allowing us to store and retrieve classical information. Specifically, we employ a flux-driven Josephson junction-based coupling scheme to controllably swap coherent states between two cavities, demonstr...