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Efficiency of underdamped dc SQUIDs as readout devices for flux qubits
Li, Shaoxiong Wang, Zhen Han, Siyuan Qiu, Wei Yu, Yang
Li, Shaoxiong
Wang, Zhen
Han, Siyuan
Qiu, Wei
Yu, Yang
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Abstract
The flux state quantum bit (qubit) is promising for a solid state implementation of scalable quantum computing. The simplest flux state qubit consists of an rf SQUID with two fluxoid states, which can be readout with a de SQUID-the most sensitive magnetic flux detector. Efficient readout with less back-action is desirable for quantum computing. In this work, we report measurements of the switching flux and switching current distributions of under damped dc SQUIDs. The data show that single shot readout of flux qubit with very high efficiency (>99%) can be realized using underdamped hysteretic de SQUIDs.
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Date
2003-06
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Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
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Keywords
Applied physics, Readout, Engineering, Electrical & Electronic, DC SQUID, Qubit
Citation
Li, SX; Yu, Y; Qiu, W; Han, SY; Wang, Z. Efficiency of underdamped dc SQUIDs as readout devices for flux qubits. IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY. June 2003. 13(2, Part 1): 982-985.