Siddiqi, I. ; Vijay, R. ; Pierre, F. ; Wilson, C. M. ; Metcalfe, M. ; Rigetti, C. ; Frunzio, L. ; Devoret, M. H. (2004) RF-driven Josephson bifurcation amplifier for quantum measurement Physical Review Letters, 93 (20). ISSN 0031-9007
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Official URL: https://doi.org/10.1103/PhysRevLett.93.207002
Related URL: http://dx.doi.org/10.1103/PhysRevLett.93.207002
Abstract
We have constructed a new type of amplifier whose primary purpose is the readout of superconducting quantum bits. It is based on the transition of a rf-driven Josephson junction between two distinct oscillation states near a dynamical bifurcation point. The main advantages of this new amplifier are speed, high sensitivity, low backaction, and the absence of on-chip dissipation. Pulsed microwave reflection measurements on nanofabricated Al junctions show that actual devices attain the performance predicted by theory.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Physical Society. |
| ID Code: | 139280 |
| Deposited On: | 21 Aug 2025 10:27 |
| Last Modified: | 21 Aug 2025 10:27 |
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