Document Type
Article
Date
8-18-2008
Language
English
Disciplines
Physics
Description/Abstract
We present a measurement protocol for a flux qubit coupled to a dc-Superconducting QUantum Interference Device (SQUID), representative of any two-state system with a controllable coupling to an harmonic oscillator quadrature, which consists of two steps. First, the qubit state is imprinted onto the SQUID via a very short and strong interaction. We show that at the end of this step the qubit dephases completely, although the perturbation of the measured qubit observable during this step is weak. In the second step, information about the qubit is extracted by measuring the SQUID. This step can have arbitrarily long duration, since it no longer induces qubit errors.
Recommended Citation
Plourde, Britton; Serban, I.; and Wilhelm, F. K., "Quantum Nondemolition-Like, Fast Measurement Scheme for a Superconducting Qubit" (2008). Physics - All Scholarship. 128.
https://surface.syr.edu/phy/128
Source
Harvested from Arxiv.org
Creative Commons License
This work is licensed under a Creative Commons Attribution 3.0 License.
Additional Information
Published version, minor corrections More information at http://arxiv.org/abs/0803.0958