Quantum interferometry with and without an external phase reference

Details Quantum interferometry with and without an external phase reference Quantum interferometry with and without an external phase reference

2011-08-18

arxiv.org/abs/1108.3844v2

Phys. Rev. A 85, 011801(R) (2012)

Physics

Quantum Physics

4 pages, 2 figures (formulas corrected, conclusions unchanged)

Scientific paper

10.1103/PhysRevA.85.011801

We discuss the role of an external phase reference in quantum interferometry.
We point out inconsistencies in the literature with regard to the use of the
quantum Fisher information (QFI) in phase estimation interferometric schemes.
We discuss the interferometric schemes with and without an external phase
reference and show a proper way to use QFI in both situations.

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