Extracting unambiguous information from a single qubit by sequential observers
Fields D, Han R, Hillery M, Bergou JA (2020)
Publication Type: Journal article
Publication year: 2020
Journal
Book Volume: 101
Journal Issue: 1
DOI: 10.1103/PhysRevA.101.012118
Abstract
In a recent paper [Phys. Rev. Lett. 111, 100501 (2013)], a scheme was proposed where subsequent observers can extract unambiguous information about the initial state of a qubit, with finite joint probability of success. Here, we generalize the problem for arbitrary preparation probabilities (arbitrary priors). We discuss two different schemes: one where only the joint probability of success is maximized and another where, in addition, the joint probability of failure is also minimized. We also derive the mutual information for these schemes and show that there are some parameter regions for the scheme without minimizing the joint failure probability where, even though the joint success probability is maximum, no information is actually transmitted by Alice.
Additional Organisation(s)
Involved external institutions
Hunter College
United States (USA) (US)
Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light
Germany (DE)
United States (USA) (US)
Max-Planck-Institut für die Physik des Lichts (MPL) / Max Planck Institute for the Science of Light
Germany (DE)
How to cite
APA:
Fields, D., Han, R., Hillery, M., & Bergou, J.A. (2020). Extracting unambiguous information from a single qubit by sequential observers. Physical Review A, 101(1). https://dx.doi.org/10.1103/PhysRevA.101.012118
MLA:
Fields, Dov, et al. "Extracting unambiguous information from a single qubit by sequential observers." Physical Review A 101.1 (2020).
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