High-fidelity measurement and quantum feedback control in circuit QED

Mohan Sarovar*, Hsi Sheng Goan, T. P. Spiller, G. J. Milburn

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Circuit QED is a promising solid-state quantum computing architecture. It also has excellent potential as a platform for quantum control-especially quantum feedback control-experiments. However, the current scheme for measurement in circuit QED is low efficiency and has low signal-to-noise ratio for single-shot measurements. The low quality of this measurement makes the implementation of feedback difficult, and here we propose two schemes for measurement in circuit QED architectures that can significantly improve signal-to-noise ratio and potentially achieve quantum-limited measurement. Such measurements would enable the implementation of quantum feedback protocols and we illustrate this with a simple entanglement-stabilization scheme.

Original languageEnglish
JournalPhysical Review A
Issue number6
Publication statusPublished - 1 Dec 2005

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