Quantum Fidelity for Arbitrary Gaussian States.
Abstrak
We derive a computable analytical formula for the quantum fidelity between two arbitrary multimode Gaussian states which is simply expressed in terms of their first- and second-order statistical moments. We also show how such a formula can be written in terms of symplectic invariants and used to derive closed forms for a variety of basic quantities and tools, such as the Bures metric, the quantum Fisher information, and various fidelity-based bounds. Our result can be used to extend the study of continuous-variable protocols, such as quantum teleportation and cloning, beyond the current one-mode or two-mode analyses, and paves the way to solve general problems in quantum metrology and quantum hypothesis testing with arbitrary multimode Gaussian resources.
Topik & Kata Kunci
Penulis (3)
L. Banchi
S. Braunstein
S. Pirandola
Akses Cepat
- Tahun Terbit
- 2015
- Bahasa
- en
- Total Sitasi
- 190×
- Sumber Database
- Semantic Scholar
- DOI
- 10.1103/PhysRevLett.115.260501
- Akses
- Open Access ✓