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Broadcasting Quantum Fisher Information
- Source :
- Phys. Rev. A 87, 050302(R) (2013)
- Publication Year :
- 2012
-
Abstract
- It is well known that classical information can be cloned, but non-orthogonal quantum states cannot be cloned, and non-commuting quantum states cannot be broadcast. We conceive a scenario in which the object we want to broadcast is the statistical distinguishability, as quantified by quantum Fisher information, about a signal parameter encoded in quantum states. We show that quantum Fisher information cannot be cloned, whilst it might be broadcast even when the input states are non-commuting. This situation interpolates between cloning of classical information and no-broadcasting of quantum information, and indicates a hybrid way of information broadcasting which is of particular significance from both practical and theoretical perspectives.<br />Comment: 5 pages. Improved version. Any comments is welcome
- Subjects :
- Quantum Physics
Mathematical Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. A 87, 050302(R) (2013)
- Publication Type :
- Report
- Accession number :
- edsarx.1206.2821
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevA.87.050302