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- Title
Quantum phase estimation with local amplified 1001 state based on Wigner-function method.
- Authors
Xu, Xue-Xiang; Yuan, Hong-Chun
- Abstract
We demonstrate the utility of Wigner-function (WF) method in studying the quantum phase estimation. This phase estimation protocol for optical interferometry uses local amplified 1001 state as a probe state. Here, the probe state is obtained by local squeezing each mode of a single-photon-path-entangled state (1001 state). We derive analytically the WFs in describing the connection between input and output fields. In addition, the phase estimation is examined by using parity detection, and the results indicate that our strategy is super-resolving and supersensitive.
- Subjects
QUANTUM phase transitions; ESTIMATION theory; QUANTUM states; WIGNER distribution; PARTICLE physics
- Publication
Quantum Information Processing, 2015, Vol 14, Issue 1, p411
- ISSN
1570-0755
- Publication type
Article
- DOI
10.1007/s11128-014-0854-3