Quantum Back-Action of an Individual Variable-Strength Measurement
Abstract
The actual process of measuring a quantum system has an effect on the result making the outcome unpredictable. Using a superconducting qubit placed in a microwave cavity, Hatridge et al. (p. 178 ) found that a series of partial measurements on a quantum system left the system in a pure state. Looking at the record of the actual measurements allowed the final state of a superconducting-based quantum system to be determined accurately. Such control is crucial for achieving full feedback control of a general quantum system.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jan 11, 2013
- Source ID
- 10.1126/science.1226897
Entities
People
- B. Abdo
- F. Schackert
- K. Geerlings
- K. M. Sliwa
- Luigi Frunzio
- M. Hatridge
- M. Mirrahimi
- Michel Devoret
- Robert J. Schoelkopf
- S. M. Girvin
- S. Shankar
- Teresa Brecht
Organizations
- Army Research Office
- Institut National de Recherche en Informatique et en Automatique
- National Science Foundation
- Yale University