Quantum Nondemolition Measurements of a Qubit
- 1 May 2002
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 88 (20), 207901
- https://doi.org/10.1103/physrevlett.88.207901
Abstract
The concept of quantum nondemolition (QND) measurement is extended to coherent oscillations in an individual two-state system. Such a measurement enables direct observation of an intrinsic spectrum of these oscillations avoiding the detector-induced dephasing that affects the standard (non-QND) measurements. The suggested scheme can be realized in Josephson-junction qubits which combine flux and charge dynamics.Keywords
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