✦ LIBER ✦
Programmable quantum measurement device that approximates all projective measurements on a qubit
✍ Scribed by J. Fiurášek; M. Dušek; R. Filip
- Book ID
- 105357245
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 72 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0015-8208
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
A “universal” quantum measurement device is proposed. It can approximate any projective measurement on a qubit. The measurement basis is selected by the quantum state of a “program register''. The device is optimized with respect to maximal average fidelity. A contra‐intuitive result is that if two qubits in the same state are used as a program the average fidelity is higher than if the second program qubit is in the respective orthogonal state.