Quantum-classical interface based on single flux quantum digital logic
Quantum-classical interface based on single flux quantum digital logic
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DOI：
10.1088/2058-9565/aaa3a0
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发表时间：
2018-04-01
影响因子：
6.7
通讯作者：
Ohki, T. A.
中科院分区：
文献类型：
--
作者：
McDermott, R.;Vavilov, M. G.;Ohki, T. A.
我们描述了一种集成控制和测量大规模超导多量子位阵列的方法，该阵列包括多达10（8）个物理量子位，使用基于单通量量子（SFQ）数字逻辑系列的近端协处理器。相干控制是通过用最优控制理论导出的经典比特流直接照射量子比特来实现的。量子比特的测量是由约瑟夫森光子计数器进行的，它提供了在毫开尔文阶段的投影量子测量的经典结果。我们分析了SFQ协处理器的功耗预算和物理占用空间，并讨论了与这种方法相关的挑战和机遇。
We describe an approach to the integrated control and measurement of a large-scale superconducting multiqubit array comprising up to 10(8) physical qubits using a proximal coprocessor based on the Single Flux Quantum (SFQ) digital logic family. Coherent control is realized by irradiating the qubits directly with classical bitstreams derived from optimal control theory. Qubit measurement is performed by a Josephson photon counter, which provides access to the classical result of projective quantum measurement at the millikelvin stage. We analyze the power budget and physical footprint of the SFQ coprocessor and discuss challenges and opportunities associated with this approach.