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| related topics |
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Improving quantum interferometry by using entanglement (to take a
decision you'd better use entanglement)
G. M. D'Ariano, Matteo G. A Paris, Paolo Perinotti
abstract: We address the use of entanglement to improve the precision of generalized
quantum interferometry, i.e. of binary measurements aimed to determine whether
or not a perturbation has been applied by a given device. For the most relevant
operations in quantum optics, we evaluate the optimal detection strategy and
the ultimate bounds to the minimum detectable perturbation. Our results
indicate that entanglement-assisted strategies improve the discrimination in
comparison with conventional schemes. A concrete setup to approach performances
of the optimal strategies is also suggested.
- oai_identifier:
- oai:arXiv.org:quant-ph/0110105
- categories:
- quant-ph
- comments:
- 2 figs
- doi:
- 10.1103/PhysRevA.65.062106
- arxiv_id:
- quant-ph/0110105
- journal_ref:
- Phys. Rev A vol 65 062106 (2002)
- created:
- 2001-10-17
Full article ▸
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