Frequency division multiplexing readout and simultaneous manipulation of an array of flux qubits
Frequency division multiplexing readout and simultaneous manipulation of an array of flux qubits
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DOI：
10.1063/1.4739454
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发表时间：
2012-07-23
影响因子：
4
通讯作者：
Ustinov, A. V.
中科院分区：
文献类型：
--
作者：
Jerger, M.;Poletto, S.;Ustinov, A. V.
超导量子电路的一个重要理想要素是一种读出方案，其复杂性不会随着测量所涉及的量子比特数量的增加而增加。在此，我们提出一种采用单条微波线路的读出方案，它能够同时读出多个量子比特。因此，超导量子比特电路的扩展不再受读出装置的限制。我们展示了使用频分复用技术对6个磁通量子比特的并行读出，以及对3个量子比特的同时操控和时间分辨测量。我们讨论了如何将该技术扩展以读出芯片上的数百个量子比特。（C）2012美国物理学会。[http://dx.doi.org/10.1063/1.4739454]
An important desired ingredient of superconducting quantum circuits is a readout scheme whose complexity does not increase with the number of qubits involved in the measurement. Here, we present a readout scheme employing a single microwave line, which enables simultaneous readout of multiple qubits. Consequently, scaling up superconducting qubit circuits is no longer limited by the readout apparatus. Parallel readout of 6 flux qubits using a frequency division multiplexing technique is demonstrated, as well as simultaneous manipulation and time resolved measurement of 3 qubits. We discuss how this technique can be scaled up to read out hundreds of qubits on a chip. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4739454]